Passenger speaker not working

[kjk1500]

I have a 94 k1500. My front passenger side speaker doesnt work. I replaced my head unit with an alpine . It had a pioneer before. I wired it up and was left with 3 wires off the head unit. I have two running to the speaker with a splicer on each wire. When I hook it up Im always left with one wire. And it wont work with the truck turned on only with the key turned back. What could this be?

[biodtl]

Was the Pioneer hooked up with a wiring harness attached to the factory harness? Or was it all spliced in? Did all speakers work with the Pioneer?

[Dylan-0308]

check at the speaker to see if there is power at the wires.. alot of head units will have a dimmer wire and a power antenna wire that dont generally get used. if you have the wiring kit ( that plugs into the GM harness ) its really hard to mess up as you put all the same color coded wires together.

[kjk1500]

I have every wire going to the wiring harness from the head unit except for three because there arn't anymore wires to connect them to.

[Dylan-0308]

what colors are the 3 wires

[kjk1500]

I will check tomorrow but I think its pink blue and black? I will still check though