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Chevy S10 - GMC S15 and Sonoma Electrical Problems



  • I too have a 1995 S10 whose headlamps suddenly stopped working but the highbeams and daytime running lights work OK. About a year ago, I had a problem with the headlamps intermittently switching off and on; to fix, my dealer replaced the entire turn signal arm (with the wiper switch and cruise controls, cost more than $500). Am hoping the problem is NOT in that arm. Will welcome advice ... for my problem seems identical to that of catdug.
  • Hey There I am having a problem with my brake lights as they are staying on after I turn the truck off. I have just taken the fuse out for now but was wondering if there is a brake light switch or connection that is lose and where to locate it. Any help would be great thanks.
  • 2002 s-10 zr5 Every now and then when I start the truck the security system kicks in and I cannot start the truck until excatly 9 min goes by. Help has any one had the same problem? What can I do.
  • I have had the same problem with my 98 S-10. I have yet to figure out exactly what it is. but I can tell you what it is not. double check to make sure the brake light above the cab is not on. If that is working properly then it is not the switch on the brake pedal. Every mechanic I have talked to has tried to get me to change that, and I have and it won't fix it.

    Mine has since gone from staying on all the time to just being on when the car is running, to not working any of my blinkers, to last night everything electrical just died when I pulled in my driveway. i am not sure exactly what it is, but if you find out let me know.
  • hoodlatchhoodlatch Mid-westPosts: 255
    I had a similar problem with one of my kids car. Come to find out someone had replaced one of the rear tail lights with a wrong bulb which was causing a feed back problem. It was acting really weird. After I got the correct bulb installed it went back to acting normal.
  • HI,

    The wiper motor may is probably wired with a hold in circuit. Once the wipers begin a cycle, a seprate/other switch closes and remains closed until the wipers complete the cycle and then the hold in switch opens (and Wiper motor stops). This is so that when you manually shut off the wipers in the up swing of a cycle, the wipers complete the swing and stop at the bottom.

    I'd guess that this hold in position switch is bad, mis-adjusted or bent/damaged. I'm not sure exactly where iti is - but I guess on or in the wiper motor or linkage. If it's in the motor - you may need to swap it out. ...

    LEt us know what you find ???

  • Having problems with blower motor not wanting to come on. This has happened twice in past week and a half but it would then start the next time I started the engine. Now it has stopped and hasn't re-started. Checked fuse - OK. Which relay on the firewall runs the heater/ ac blower? That is the next thing I want to check.
  • hoodlatchhoodlatch Mid-westPosts: 255
    I had the same problem with my 92 S-10 a couple of weeks ago. I replaced the blower relay first but found out the problem was the AC Heater Blower Motor Resistor Assembly p/n 10039426. Its about a 10 dollar part at places like Advance Auto Parts or Autozone and takes about 10 minutes to replace. On my S-10 its located on the blower housing, under the hood, on the passenger side. It has 4 wires going to it and 2 screws holding it on. It looks flat on the out side with wire terminals. Once removed, the underneath side looks like 3 coils hooked together and reminds you of something you would get in a Heath kit or a left over from "My Favorite Martian".
    Good Luck :shades:
  • 1999 chevy s10 2.2l Can a loose connection (busted housing) affect trucks ability to start/Affect the electrical systems overall. MY S10 has died and doesn't seem to hold a charge.
  • dashaldashal Posts: 2
    I have a 1994 S10 standard cab that runs great but is starting to get quirky. The brake lights above the cab (3rd deck?) are out. The bulbs are brand new and there are no fuses out, not that I can figure out the appropriate one anyways, but regardless they don't work. The regular brake lights are operating fine. Also the far left side of the dash board has gone dark. This is the section that has the switch to turn the head/parking lights on and off. There are zero fuses out in the panel, they are all fine and I have no idea what operates the light behind the switch orhow to access it.
  • I have a 2000 Gmc Sonoma SLS 3 door stepside. My question is what would cause the lights to just turn themselves off. I live in southern ca and do a lot of canyon driving and on a couple of occasions my lights just turned off. I was able to turn them back on manually, but I do not need them to go off into a dark corner. any advice could help.
  • john180john180 Posts: 2
    I'm having trouble with the dashboard dials on my s10.Every thing goes out except the gauge for the battery and the oil pressure.They go off and on at random.i have changed the cluster and it seemed to work for awhile but it's doing the same thing again.
  • dropt4dropt4 Posts: 3
    Okay so I did some major work on my Sonoma where I had to disconnect my harnesses. Well I was putting everything back together the way it was. Everything is grounded and hooked up, but when I went to start it all I get is the little black boxes on the firewall making like this loud whining noise. I have power to everything, but the fuel pump does not prime and the truck acts like it is dead even though power is running through headlights and everything.

    Can someone please help? I do not know where to start with this one. Anyone had this problem maybe with the boxes making this loud noise? Truck worked fine before I did the work..
  • dropt4dropt4 Posts: 3
    O and if it matters I have a 4.3l V-6..
  • jlleiberjlleiber Posts: 1
    Hello...I just installed a satellite radio receiver that sits on my dash and hooks into my cd player and cig lighter. In order to install it I had to remove my dash panel and when I put it all back together my instr panel backlighting and a/c control lighting doesn't work. Every other interior light works fine, cd player works fine, all fuses are fine....any idears???

  • My dash lights went out after starting the vehicle one very cold night. I heard a click from under the dash when they went out. I checked the fuses and all of the dash light bulbs and they are fine.

    Any suggestions?
  • Recently my truck has been making a bubbling sound that I can hear from what I think is behind the dash. Initially I thought maybe its the coolant or the radiator? took it to the dealership and they said thats just what these trucks do after so many years because of a part settling? and that the newer trucks don't make this sound because of a electronic remedy that was made as an improvement... sound like a familiar experience?

    Also my factory radio will not illuminate.

    And..... now my reverse back up lights will not work?
  • dave8697dave8697 Posts: 1,498
    I'm going to buy a '99 Sonoma with the dash lights out. Did you find out how to fix it? Could there be an inline fuse or a relay stuck open?
  • gonogogonogo Posts: 879
    Are the tail lights working, they are on the same circuit.
  • hi this is my first post my 1992 s1o digital dash cluster went out after i got into a wreck i checked all the fuses and their fine i also wire tested the plug for the display and the only ones that have power are the lights that are on the parking break and check engine lights. is there a relay or an inline fuse that could be out? thanks.
  • sharpspursharpspur Posts: 4
    I still have been unable to find any info on the issue. Really annoying. Yes, the taillights work. In fact, all of the other lights work.
  • Maybe you have a short, does the fuse keep blowing. idk..
  • estaveestave Posts: 2
    2003 Chevy S10 crewcab 4.3L Power locks,windows and mirrors dont work. Replaced door/lock switch dealers shop said it was corroded. Door locks blow fuses everytime. Ignition wire replaced to repair nonfunctional gauges, but cruise control doesn't work either.Help
  • Well if it blows the fuse everytime then you have a short somewhere.
  • dave8697dave8697 Posts: 1,498
    I'm going to buy a '99 Sonoma with the dash lights out. Did you find out how to fix it? Yes, the tail lights do work. One back up light is out. The cab top brake light cover is melted through above both bulbs, letting water in. When prev owner tried to change the bulbs he said the new bulb exploded immediately so he left them out. The radio display works in daytime and when the sensor senses darkness and turns on the cluster lights and dims the radio display, everything goes dark, the radio and the entire cluster. I called chev dlr and they said they would check fuses, then two different relays and then an in-line fuse. I'm going to start by getting a new cab top brake cover and drying it out in there. Then I'm gonna get a new back up bulb and check all fuses. then I'm gonna try new cab top brake light bulbs. Then I will look for relays under the dash or in the fuse box. I just got the truck 5 days ago and had to drive it up from Fla. Tomorrow's my first day to mess with it. Anybody got any other ideas?
  • dave8697dave8697 Posts: 1,498
    all fuses chacked and found to be OK. brake 3rd light above cab had holes in cover from intense heat who knows how long ago. holes plugged now with RTV. leadframe assy heat damaged that bulbs mount in. Could heat that melted holes in cover have melted leadframe leads together in plastic housing causing short that killed instr cluster lights? I will be looking for a new leadframe assembly. Anyone know where relays for day/night sensor that turns on instr cluster lights is? Dome light on flip side of 3rd brake light still works.
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