my head lights wont turn by the switch nor does my day time running lights work.The only lights that come on are the parking lights.Every now and agian my head lights will come on,but dont stay on.I was told by different ones to add another ground wire.How can I be sure if its my head light sensor or my light switch
Check the fuses first, but... I have seen the switch short out and melt on more than one S- 10/Blazer.... I would disconnect the battery and using a small flathead screwdriver, or nylon/plastic panel-popper, try to pop the switch out... Most just snap into the dash, but measure twice cut once, know what I mean? So look around it for any hidden screws, clips, etc that may be holding it in. Never *force* anything that's made out of plastic because plastic gets brittle when it gets old and it WILL break.
it would be like NOT a big deal to change out the headlight relay....if you knew which one that is....look 'pon the drawing on the cover~_____ https://www.google.com/#q=2004+Chevrolet+S-10+headlight+relay
reliable ground connection is paramount...follow the black 1/0 cable from the battery to the spot where it attaches to the chassis ground...unbolt and wirebrush this spot and the lug too so that a 300 cold cranking amp potential can be realized~
the 1/0 cable connection to the engine block as well~
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