I hooked up the voltmeter to the proper wires and get these measurements.

-------

Key forward or key to start while in neutral - .575

Key to start in park and actually starting - 17.94

-------

Which size resistor do I need?

 

Let me do some research on this one.

 

On my Camaro i just unplugged it and my security light stayed on. but the car ran normally
I also found all the resistor codes on google, not sure if anyone has them for our trucks

 

I beleive it would be the starting number because thats when it will be activated, mine stopped the starter from doing anything and it was a good starter, battery, wiring the whole deal

 

Well when it's running, it's .575 and when I touch the wires back together, the security light goes off, so I think that's the one I need. I just need to measure it one more time so I can convert it to K or M to get the proper resistor size. I'll keep you guys posted. This problem will start popping up a lot more often on the older trucks like mine as they wear out.

 

Subscribed...


Mines a 2000 and i dont think ill be happy when mine starts acting up..

Actually i might take it in to the stealership to see what they "say"...
"What do you mean? I bought it like this from the factory"

 

Well it worked. RS didn't sell a 575 ohm resistor, so I bought a 450 and a 125 and spliced them together inline with each other. Then I spliced one end into the black/orange(I think) wire and the other end into the cut yellow wire (the end leading to the computer). Then I taped up the other end of the yellow wire leading into the ignition and tied it out of the way. Soldered everything into place and heat shrink'ed it/electric taped it. Truck started right up and no security light. Disconnect/reconnect the battery, and it started right up again. This fix works! Passlock is pretty much useless anyway, so I'm not worried about not having it.

Edit: Oh yeah, it was .575K ohms on the voltmeter. The K means 1000, so I needed 575 ohms in resistor(s). They may use random numbers in different trucks, so check yours before buying the resistors. And to the guy with the 05, yeah they went to a more advanced system in 03 that doesn't malfunction as much.