Is there anything more satisfying than..
Chasing a problem with your vehicle that has left you stranded, failed to start, rolling the dice anywhere you took it, having the old lady bitch at you to get rid of it, kicking and screaming at it, thinking she might be right, spending hours tearing into it thinking you have it fixed; then FINALLY finding the issue and fixing it? I have been chasing a no start/security system problem on my 2005 Silverado 1500 for the last six weeks. At random, I would go to start it and get a crank/no start. The security light would flash and I would have to do the relearn procedure which involves leaving the key in the ignition for 10 minutes, attempting to restart and repeat this for three times. Well the last time it did it, my gf and I were leaving an event at 9pm and it was a no start. Of course it happened to be freezing outside, it was dark and no one was around. She was done with it and so was I. I spent hours researching forums about the GM passlock issues and was ready to throw in the towel, take it to a shop or let it be someone else's headache.
Today was my day! I decided to give it one last shot on my lunch break to look it over. I took apart the dash for the one hundredth time and there it was, one lone broken wire buried in between some others. It was barely visible but I could see some copper poking it's ugly head out. I traced the wire back which lead to the BCM at one end and the PASSLOCK sensor on the other at the ignition switch. I couldn't figure out how that wire could be broken but the truck still ran 75% of the time? Well upon further inspection, some wise guy figured out that the PASSLOCK sensors sends an OHM reading to the BCM from the passlock sensor and you can cut that wire to splice in a resistor (or two in series since he didn't have the right one). After removing some electrical tape, I found the two resistors with one of the ends snapped off. They were bypassing the system in order to install the aftermarket remote start that was no longer present on the truck. This would trick the truck into thinking it always had a key in the ignition. I am no mechanic but my dad was for the better part of my life but I can only imagine that the PASSLOCK sensor was getting a signal sometimes after the truck the was running and then on the other times when the resistors weren't making contact, causing the no start.
I took all the crap out, soldered the wires back together, heat shrinked, a VOILA! It started with no lights! It was extremely tight in there so getting the iron and holding the wires in place was a bitch. It may not be pretty but it will hold. Oh the joys of owning older vehicles, being stubborn and the relief you get when you get it fixed. I think I am going to do a victory burnout in front of the house to show my gf the old girl still got it. She hates this truck but it just keeps going with 217K.
Broken yellow wire:
Broken Resistor:
Poor solder job:
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Originally Posted by ray1970
It only came with a single controller, so it still mystifies me.
