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Chevy S10 - GMC S15 and Sonoma Electrical Problems



  • I just bought a 96 s10 and it has some electrical issues with the front lights. The left turn signals in front don't work. It shows on the dash and the rear ones work, just the front ones don't. I'm not sure how to troubleshoot this. I noticed near the firewall there are 3 wires not connected to anything current;y, 2 with plastic connectors, and one with a single loop connection (intended to be bolted to something I believe) I am not sure what is what though.

    Also my headlights are iffy. With both plugged in they kinda dim in and out, and if i try to hit the brights, they don't work at all, they go off completely. If I remove 1 headlight it seems to work fine. Could this be a bad ground?
  • gonogogonogo Posts: 869
    Your on the right track, check all your grounds, lights do strange things with lack of a ground.
  • well i isolated the wiring from the dash to the lights, and have the whole wiring section isolated right now, I found 2 grounds along it, both very rusty. They both connect to the body that supports the radiator. I could find no other grounds so im guessing these are my problems.
  • Can someone help a gal out? I went to get my S-10 inspected today. I knew my turning signals weren't working right but I thought it was a burned out bulb. Come to find out they told me that I needed a Power Distribution Center/Box??
    Went to Advance Auto & CarQuest & they didn't have any. So, where do I go to get one??
  • gonogogonogo Posts: 869
    I would take your truck to some one else and get a second opinion, center dist box sounds fishy.
  • why does it sound fishy? I don't understand. The turning signals, hazard lights don't work. Is there something else that it could be? :)
  • gonogogonogo Posts: 869
    I am not sure what they mean by center distribution box. Where did you go to get the lights diagnosed? I still think you need a second opinion. What did the first opinion cost you ?
  • I took it to a local place in town for inspection. They called it a Power Distribution Box. It didn't cost me anything as they would not inspect my truck since the turning signal lights weren't worked.
  • gonogogonogo Posts: 869
    I looked up the power feed for both the turn & hazard and it is the same power feed, cell 10, at least for my 99. The power feed should maybe able to be repaired instead of replacing the complete unit. Replacing the power dist box is not for the faint of heart, lots of wires.
  • thanks for the info- I will check into that before buying the whole unit :shades:
  • CDIICDII Posts: 8
    Have you checked "LMCTRUCK.COM"
  • CDIICDII Posts: 8
    Also, If not socket,wire to cab, or fuse. Might check turn signal switch in the steering column, I believe the brake light works through it if not mistaken.
  • has anyone else had any luck with fixing this problem
  • My 99 s10 is going crazy, the voltage drops from 14 to 11 and the truck begins to sputter and backfire and all of the dash lights and the gauges start going up and down. I know when its about to do it when the voltage begins to drop I usuallly drop the gear and it backfires and sputters like crazy but I keep it from stalling. Please help.
  • the head lights work in day time but the pass side head light does not work at night when the rest of the lights are on???
  • gonogogonogo Posts: 869
    Your low beam on that side is burned out, the DRL during the day goes through the high beams only. If this is true your light should be out during the day when you turn your head lights on manually.
  • goofysexygoofysexy Posts: 1
    my cigerett liter wont work nether will the radio or the horn
  • gonogogonogo Posts: 869
    Check fuses, cig, radio, etc.
  • the_big_althe_big_al Posts: 1,068
    Okay - so I posted this in the climate control forum not realizing that I had done so.... oops. So here it is in the right place (I hope :D)

    Here's a truly odd one. I think I solved the heater issue I was having though. I checked the coolant level and found that it was low. I added more coolant and all seems fine now. It is time for a coolant flush though. All three of my vehicles need it as well as 2 of them need an oil change... Looks like a good half a days work.

    Anyway, I am experiences a quirky turn signal. It is on the driver's side. It only happens when the lights are on and then only intermittently. When it happens it acts like a bulb is burnt out with the fast and short blinking. Only there are not any bulbs out. When it has happened, I have gotten out of my truck to see what is happening. The front seems fine. However, the rear lights are where the quirk is. When the turn signal is on the bright lights up, but near as bright as it should. When it goes of, the reverse light, driver's side license plate light and tail-light illuminate. Then alternates back to a not as bright turn signal.

    It's hard to explain... maybe I'll try taking a video of it when it happens again and posting it. But at this point I am at a loss as to where to even begin....
  • gonogogonogo Posts: 869
    Strange electrical is always a bad ground.
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