Hey guys haven't been on in awhile because i haven't had any problems as of late that i couldn't figure out but this one's got me stumped because i'm new to electrical.

One day the blower motor stopped working on my full size conversion van so i cleaned contacts and it worked again, but only for a couple days, now i tried to clean these contacts again and the blower does not work, only irregularly sometimes.

My question is could it be a relay? and if so how do you check this with minimal electrical experience?

Any help would be greatly appreciated. Thanks