All Headlights On - Wiring Diagram

[ag4gt]

I installed the one wire mod for having all four headlights on as suggested by n2obigblock in his post at

http://www.fullsizechevy.com/forum/showthread.php?s=&threadid=85936

and it works just fine. However having an inquisitive mind I would like to know what I have done to the headlight circuit of my wife’s truck. If anyone has a wiring diagram for the ’01 Silverado and could post it, I would like very much to see it.

Thanks

[LS6TT]

will this work for the 88-94's as well?

[highgmc]

you can do it all in the under hood fusebox

[bad95z71]

just bought the painless kit:banghead:

[ibthumpin]

Originally posted by highgmc
you can do it all in the under hood fusebox
yeah, thats what the other thread says...... :whatever:

[Steveo_supremo]

will this work for the 88-94's as well?

:banghead: :banghead: :banghead: :banghead:
No, use a relay.

[Beyond Static©]

88-98 instructions

Get a relay that is made for 12v use(I got mine at O-reillys for under $4.) The posts on the relay are numbered-#85,86,87,30. Use a test light(or volt meter) to test the wires to find which wires are the right ones when finding the low beams and high beams. If it's the right wire, it will read around 12v on the volt meter. The headlight wiring harness is on the driver's side, running over the fender wells. Tap the wires in as follows:

#87 post goes to Low Beam
#85 post goes to High Beam
#86 post goes to Ground
#30 post goes to constant 12v( I ran this into the cab in the main distribution box so I wouldnt have wire running all round the engine compartment).

I cut some of the insallation off the wires I needed(high beam and low beam), and soldered a 6" wire with each. This way I could solder them to the relay, and have strong connections. Then use either heat shrink or electrical tape to cover the connections. Now find a good ground, and run that wire. Next, run the 12v wire to constant power, using an inline fuse with a 20 amp fuse.

I'm pretty sure someone said if you have a 99-02, you dont need to run a constant 12v. Just low beam, high beam, and ground.

[ShamrockCustoms]

Interesting info !

[97Silverado]

I did this mod along with Silverstar bulbs on both our FSCs. Absolutely awesome!!

[LiquidFX]

any pix

[LiquidFX]

i tired that and i cant get the fog lights to come on at all, and the only way all four lights are on is if the fog light switch is off.

[cxpcman]

i tired that and i cant get the fog lights to come on at all, and the only way all four lights are on is if the fog light switch is off.
.how do you wire it . post a diagram to see whats wrong !

[chrisk1500]

I did this mod to the '94 the other day and it works ok when I have my lights on. The only problem I am having is that my DRLs only work when the dimmer switch is on the bright setting. If I flick the dimmer switch (without the lights on - just DRLs on) the DRLs shut off and won't come back on unless I unplug and replug the relay back in. What is wrong with my setup?

[cxpcman]

maybe you conect the power cable to the dimm cable instead of the battery

[97Silverado]

I did this mod to the '94 the other day and it works ok when I have my lights on. The only problem I am having is that my DRLs only work when the dimmer switch is on the bright setting. If I flick the dimmer switch (without the lights on - just DRLs on) the DRLs shut off and won't come back on unless I unplug and replug the relay back in. What is wrong with my setup?'94s don't have DRLs. You must have done something else funky in there somewhere. Recheck your wiring.

[chrisk1500]

I am in Canada - trust me - I have DRLs.

I also connected everything as per the instructions.

Any other ideas? I am leaning towards a bad relay.

[97Silverado]

I am in Canada - trust me - I have DRLs.

I also connected everything as per the instructions.

Any other ideas? I am leaning towards a bad relay.Being in Texas I guess I should have known that.

If you are having to unplug the relay then it sounds like the relay is sticking internally.

[chrisk1500]

That's what I was thinking - I just wanted someone else to offer the same suggestion. I guess I will have to break down and buy the $2 relay.

[Hoeon4'z]

I own a car stereo shop here in town, and i can tell you from my experience, get the Bosch 40amp relays, they seem to last the longest and i rarely have a sticking problem. Also if you run them in parallel, that might help fix the problem. Juss my 2 cents worth. Jordan

[chrisk1500]

Also if you run them in parallel, that might help fix the problem.

Would you mind expanding on that?

[Red94Chev]

Chrisk1500,
I have had the same problem as you with my Canadian 94 Chev with the Painless wiring kit and the DRLs. DRLs shut off with the relay hooked up, but the headlights worked fine with all four headlights on with the hi-beams. I haven't figured out the problem, but I did notice that the DRLs/hi-beams work fine if the engine is off. I hooked up my power supply to the alternator and was going to try as different 12V source (or no power source) to see if that fixed the problem. I didn't know the dimmer switch had anything to do with it, but I'll see if that affects mine as well. I figure the relay was designed for the US trucks, which didn't have DRLs for this model year. I'm thinking that Painless kit is shorting out the DRL relay somehow. Less power for the DRLs maybe?

[chrisk1500]

Yeah, like I said, with the relay hooked up the DRLs will work if the dimmer switch is in the 'bright' position with the lights off, but as soon as I flick the dimmer switch (without the lights even being turned on) the DRLs cut out and won't come back on unless I flick the dimmer switch back to the 'bright' position and then unplug the relay and plug it back in.

Maybe this mod doesn't work with DRLs. Is there anyone out there that has been successful with this mod on a 88-98 with DRLs???

[Red94Chev]

ChrisK1500, I ended up emaling Painless Performance about this issue to see if they had a fix. I figured I may have hooked something up wrong, but your experience (and mine) suggests that this may be a problem with all Canadian trucks with DRLs. Their reply is below:

Hello,
We do not have a cure for the Canadian DRL issue. You may be able to get a diode from Radio Shack (part number 276-1661) and place it inline with the black ground wire. you will need to experiment with the direction of the stripe on the diode. Try it both ways and see if one works.

PPPI Tech Support
800-423-9696
Mon-Fri 8am-5pm central

Thought I'd try it out to see it things work properly.

[addiction2bass]

Would you mind expanding on that?

quite easy realy.... just conect 2 relays to the one wires...
so basicaly instead of all the power how ever many amps lets say 30amps. instead of just one pumpen out 30amps and worken the hardest you have 2 relays wired in the same way which basicaly allows them to only pull like 15amps thru each.

kinda hard to draw it but its preaty much just where you connect the one wire conect 2wire to 1 relay

basicaly just splice in an extra relay.
i just made a picture of it but my MSpaint froze and i dont feel like doing that crap over again.LOL

just put the relays side by side and basicaly do a Y conection to the 2 off the main wire.

[chrisk1500]

You may be able to get a diode from Radio Shack (part number 276-1661) and place it inline with the black ground wire. you will need to experiment with the direction of the stripe on the diode. Try it both ways and see if one works.



Let me know how that works out.

If it doesn't work, I may try the 2 relays in series.

[chrisk1500]

I have thought about it a little more and was wondering what anyone's take on this idea would be:

Instead or running a 12v constant to the relay, run the 12v from a wire off of the light switch that is hot when the taillights are turned on. This way the relay is only powered when the lights are on, and has no power when the lights are off (DRLs would still come on). Any flaws in my thinking?

[addiction2bass]

actualy not sure.....
the relay should only be activated when the bright lights are turned on which then sends power to the low beams.....

and i believe that the DRL lights are simple low power sent thru the high beams. so i dont think that would help any. ud still have to unplug it or what ever you had to do for it to come back on.....


if it was me id probably hard wire everything!
wire up the low beams as running lights to turn on with the ignition so they are always ON and then wire in the bright light relay.
or just wire in some fog lights as DRL if thats legal im not sure......

you might just have to run the wires and find out where the power for the DRLs are comen from and put a diode on that wire from the power source.

needless to say sounds like alot of work. :(

what would probably make it easier is to do all the wiring under the hood next to the headlights! that way you can use diodes on every headlight wire to ensure that no power is geting fed back into the harness. and instal the relays up thier.
only problem i could see is the current be to much for those diodes. id probably ask the smart guy at radio shack that first ;) we all know thiers always a stupid kid that doesnt even know what its for.LOL

[bigunner1]

the link won't work for me. i have an 03 that iwould like to do this to. i did it to my 92 no prob, but i see on this one there is a fuse for each light,,,l/r. do i need a relay for each light?

[addiction2bass]

well i just found out a few nights ago dont do this to a dual fillement bulb.LMFAO the tips blow off!

looked great for about 2 days..... then one day it just POPED. i took it out and the whole tip was gone from it like exploding.LOL
just took it back to autozone for a new one and now i just drive around with my bright lights on all the time.LOL

[Red94Chev]

ChrisK1500, I ended up emaling Painless Performance about this issue to see if they had a fix. I figured I may have hooked something up wrong, but your experience (and mine) suggests that this may be a problem with all Canadian trucks with DRLs. Their reply is below:

Hello,
We do not have a cure for the Canadian DRL issue. You may be able to get a diode from Radio Shack (part number 276-1661) and place it inline with the black ground wire. you will need to experiment with the direction of the stripe on the diode. Try it both ways and see if one works.

PPPI Tech Support
800-423-9696
Mon-Fri 8am-5pm central

Thought I'd try it out to see it things work properly.

Tried the above diode on the weekend - didn't help. Thinking of trying a different power source besides the alternator.

[addiction2bass]

ya sure the diode was in thier right?
or did you do it inside the truck?

id say for you guys need to wire everything right on the back of the actualy headlights themselfs. and diode every wire if ya can.
my only concern is not knowing how much voltage a diode can take before burning out! :(

[addiction2bass]

ya sure the diode was in thier right?
or did you do it inside the truck?

id say for you guys need to wire everything right on the back of the actualy headlights themselfs. and diode every wire if ya can.
my only concern is not knowing how much voltage a diode can take before burning out! :(

[chrisk1500]

Tried the above diode on the weekend - didn't help. Thinking of trying a different power source besides the alternator.

If you figure it out, let me know.

I'll see if any of my buddies in electrical engineering know what how to make it work.

[Legend 94]

Hey guys I've been lurking in the background for some time and decided to finally post on the board. Lots of great info here for sure!

Anyway, I just came across this thread and was wondering if anyone came up with a solution to the DRL problem yet ... I've got everything I initially thought I needed to do this and had intended to do it this weekend but have put things on hold for now to see if anyone comes up with a cure for this ...

[isenegger]

on the wire where are they located?...on the drivers side near the headlight. just use one relay and tap into them there?...

[isenegger]

how about this one....will it work on w/t trucks with the sealed beams...?

[Quyonmob]

Yeah, like I said, with the relay hooked up the DRLs will work if the dimmer switch is in the 'bright' position with the lights off, but as soon as I flick the dimmer switch (without the lights even being turned on) the DRLs cut out and won't come back on unless I flick the dimmer switch back to the 'bright' position and then unplug the relay and plug it back in.

Maybe this mod doesn't work with DRLs. Is there anyone out there that has been successful with this mod on a 88-98 with DRLs???

My 92 k1500 has the same issue with the DRL's no longer being on after the painless install. My truck has shown no side effects from the DRL's not being on. I get all 4 bulbs on high and just the lows on low like the kit promised, but now I have no DRL's.
I guess my question is, what is the issue? Just use your lowbeams as DRL's in questionable lighting conditions. The problem is that GM used the Highbeam bulbs as the DRL's.
I got sick of my DRLs anyhow.

[chrisk1500]

I guess my question is, what is the issue?

The issue is that something is not right with the electrical system kicking out the DRLs. A switch of some kind is being thrown to prevent something from shorting out. There is obviously interference in the wiring somewhere, I just haven't had time to look into it yet (too cold outside).

[isenegger]

what about sealed beams. will this mod work?

[Quyonmob]

The issue is that something is not right with the electrical system kicking out the DRLs. A switch of some kind is being thrown to prevent something from shorting out. There is obviously interference in the wiring somewhere, I just haven't had time to look into it yet (too cold outside).

The problem lies within the fact that GM used the highbeams as DRLs.

I have been 2 years with this mod installed and have never had any ill effects from the DRLs being turned off. My truck has plenty of electrical additions (600W stereo, MSD6A ign...), and I think I would find out pretty quickly if the were any other side effects.

[bobbyspaghetti]

Here is the link to an awesome how to for the 88-98, the 99-02 and the 03 and up. This guy also sells a kit to do this and they are between $9 and $20. I did the relay one myself but you are not gonna save that much I wouldn't think. Ill post the website so this guy dont get mad and I'll post the instructions to.

The main site. (www.mrtaillight.com)

The kits for chevys (http://www.mrtaillight.com/index.php?cPath=609_611)

The 88-98 instructions (http://www.mrtaillight.com/product_info.php?products_id=462)

The 99-02 instructions (http://www.mrtaillight.com/product_info.php?products_id=544)

The 03 and up (http://www.mrtaillight.com/product_info.php?products_id=461)

There you go don't get better then that.

[chrisk1500]

Here is a diagram - maybe an electrical guru can figure it out????

[chrisk1500]

Anyone?

[GMC Sierra]

what kind of inline fuse did you use i used a 20 amp and it blew on me. what should i use.

[Quyonmob]

I think I am using a 25. Its in a weather pack, in a wiring "bundle" now, so I can't really check for you.

[OzzHead]

Here is a diagram - maybe an electrical guru can figure it out????
I can bust out my auto books from school and figure out wat all the symbols mean and wat not. What exactly are you asking though?

BTW that site posted above is all on sale, i just orded mine

[HOLLYWOOD8]

I got the kit from the link above in which the fogs stay on with the highbeams. The only thing I didn't like about it was you lose the ability to run your fogs with the factory switch. You can hook up a seperate switch, which they sell as an option for $5, to run the fogs. I just unhooked the wire to the fogs and just run the high/low without the fogs. Otherwise, I am very pleased with the kit. a piece of cake to install.

[BIZILL]

i just did the grounding of wire #7? or whatever from the body control module. i grounded it through a switch so that i can still disable it. all six lamps look sick!!!

[spunger]

I just did this, thank god it was super simple :)

Just wondering does it put any more strain or anything on the system doing this? Like I'll use the high/low beams when I can't see (or anytime really) but leaving them on for prolong times, will it harm anything?

I used a 30amp fuse/30 amp relay and everything worked just as planed. Just used some wire splices and mounted it just like the kit shows. I didn't buy the kit, just made my own.

[addiction2bass]

only little more strain it would do is alittle more strain on the alt/battery ;) just cause the extra voltage they use. but thats it..... as long as you wired the relay to the battery and used a fuse.... i wouldnt worry abotu anything..

[spunger]

only little more strain it would do is alittle more strain on the alt/battery ;) just cause the extra voltage they use. but thats it..... as long as you wired the relay to the battery and used a fuse.... i wouldnt worry abotu anything..

Yep, relay and fuse used :)

We'll just leave it, if it catches on fire oh well J/K

[chrisk1500]

I can bust out my auto books from school and figure out wat all the symbols mean and wat not. What exactly are you asking though?



If you read the whole post you will see what I am asking.

[jabtdrx]

I am a little confused. I see that using a relay is the best way to do this, but Im not so good with all my wires can someone explain to me where to connect to the hi and low beam wires. I saw through that link that if I take off my pass side light I can tap in there is that the best way to do it? and will that do both sides or just the pass side? I have a 00/98 tahoe with fog and DRLs

[BIZILL]

i did mine on the passenger side. a relay is the ONLY way to do it. forgot to take pics. but it's simple if you print the instructions out and have them there to read. yes, you only have to do this to one side and it handles the rest from there. love the brightness!

this guy's pics make it look more complicated than it is, but...

http://www.mrtaillight.com/product_info.php?products_id=544

and you don't have to buy his kit. just use a relay you buy from autozone or anywhere else. again, i did mine on the passenger side vs. driver's.

[98350ss]

Nice mod *bump*:demon:

[damnskippy]

This Is Great, Can Anyone Come Up With A Dummy Proof Diagram For My 2000 Z-71

[damnskippy]

Want To Thank All For All Headlights On Advice And Tech Support, Simple As Pie, Ground Yellow Wire, Thanks Again

[Dan10]

The link on the first post no longer works. I would like to do this to my 02 2500 HD. Thanks

[AcrophobicChevy]

heres mine
http://i109.photobucket.com/albums/n78/acrophobic_chevy/Truck.jpg

[92__Silverado]

To those of you that have done this mod, is it worth it? Can you notice that much of a difference, also how many of you are running silverstars or upgraded bulbs.

[addiction2bass]

it works great on ANY vehicle taht doesnt have single HIGH/LOW bulbs in one bulb......

i tried it in my crx and tho it looked great for awhile.... i blew the new bulbs preaty shortly.LMFAO
but for our trucks with single high and single low bulbs seperate they work great! just remember to turn off your brights when thiers other cars around!!!!!!!

[mds2004]

I did it a few days ago and love it. I used 9005 Silverstars for both the lows and highs.

[Dreamer1q]

What happened to the original mod where it was simple wiring? I did it to my Silverado a few years ago and wanted to do it to a friends but cant seem to find it anymore. It was a simple wire grounding if I remember correctly. Anyone care to help out?

[Whitextreme]

The first post isn't working can anyone tell me how to do this with a relay on a 1999 Silverado NBS?

[gmshades]

I also just picked up a '99 Silverado. Plenty of write-up on obs and '03+, but can't find anything for the '99-'02. Is it the same as the obs?

Glenn

[ssilk12001]

Can someone re-up a link to this diy...it's dead? I'd LOVE to do this mod! Thanks!

[addiction2bass]

Can someone re-up a link to this diy...it's dead? I'd LOVE to do this mod! Thanks!


me to i forgot how i did my old one......

[ssilk12001]

Anyone know how to do this? Got pics...lol
I want to do this TONIGHT!
lol

[gray_silverado]

me three.. never got around to it

[addiction2bass]

i remember buying a kit off ebay which was preaty much just wires and a relay tho i cannt remember how i did it all since its been to long! :( and now i cannt find any thing on ebay like i bought before.

[ssilk12001]

Do I need a relay with a 93? I thought it was just a one wire jump kinda thing!

[addiction2bass]

yes you need a relay and wires ran to the fuse box or battery to pull power from. otherwise your stock wiring will fry!
now im not positive BUT I THINK this is how its wired using this diagram and changing the input names alittle...


change the REMOTE turn on wire #86 to the headlighs HIGH beam positive wire.

and change ADDITIONAL ACCESSORIES #30 to the headlights LOW beam positive wire.


just be sure to use large enough wires as well as a INLINE FUSE from the power source from the battery or fuse box how ever you wire it!
if i remember correctly thats how you can do it.


http://www.the12volt.com/12voltimages/addremacc.gif
Using a 30 amp SPDT relay, connect terminal #87 to constant 12 volts positive with a fuse rated to the sum of the additional accessories you've added and the components you need to turn on. (If you have two fans rated at 5 amps each and a neon light rated at 10 amps, you would use a 20 amp fuse plus 200 ma for each amplifier and processor.) Connect terminal #85 to ground, terminal #86 to the remote turn on wire from the head unit, and terminal #30 to each accessory with an appropriate fuse. A fuse (not shown) could also be used between the output of the relay (#30) and the remote turn on wire of the amplifiers and/or processors for extra precaution.

[ssilk12001]

Sweet THANKS!

[Swampperman]

do you only have to do this to one side on OBS or on both?