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Lighting & ElectricalPost your lighting and chassis/engine electrical questions here. Any audio/video questions should be posted in the 'Audio/Video Electronics' section.
Hello all, I have a 98 S10 2 door Blazer and I've recently encountered a problem. The car ran just fine until I parked it yesterday. The security, abs, battery, and low fuel lights came on along with the temperature and fuel gauges reading at zero. The OBD port now no longer gives any reading and just says "ERROR" and not finishing a scan. The car now cranks and fires for less than a second before shutting off. I tried doing some research and found that maybe the BCM or some ground may be the culprit? However I've inspected the BCM board and the solder points look as good as new, to my untrained eye that is. Any help is greatly appreciated. I've attached images with the key in the run position and also not in the ignition.
I was able to drive it once if I were to quickly start the car and drive it right after plugging the battery back in, but the lights and gauges continued being finicky. Every so often they'd flash away but come right back. If it means anything, as I was driving I barely tapped my OBD scanner into the port and it made everything return to normal momentarily.
All of my fuses in the car appear to be fine. The data port is outputting power to my OBD scanner and when I pull the fuse it turns off. None of my cigarette lighters are occupied either. Key turned to run position Ignition completely off
Last edited by johnnypineapple; Feb 7, 2025 at 02:32 AM.
Reason: Problem solved, data wire touching ground.
My first thought is that the class 2 data bus is corrupted by a bad module, power, ground or wiring. Pull the comb from the distr block and only connect the ECM and ODBII port and see what happens.
My first thought is that the class 2 data bus is corrupted by a bad module, power, ground or wiring. Pull the comb from the distr block and only connect the ECM and ODBII port and see what happens.
George
Thanks for your help, I forgot to update that I found the problem. It was in fact the data shorting to ground.
Electrical Malfunction?
