Electrical Help

To begin with, my background is digital hardware/software engineering and design. So I'm not trying to be a jerk or a know-it-all and my comment isn't meant to contradict anyone, but, older automotive electrical systems are not digital, I'm just trying to get you in the right direction. I know this sounds like I'm simplifying things, but, wiring/circuitry is only battery and ground. So given that, you really need the factory manual for wiring. Then find the system that isn't working. Begin there by tracing back towards the battery or ground that makes the item work. For instance, you're trying to figure out why a new and working light bulb doesn't light (key word working, a new bulb can be bad). If you have battery going into the bulb (and out the other side, means it's a good bulb) and it still doesn't light, then trace towards the ground and find where the ground is broken. If the bulb has no battery, then begin at the bulb, and trace back through each termination point to see where you see battery. Too bad you don't live near me and we could spend a few hours tracing a couple of problems. Once you get the idea on how to read the wiring diagram (and color codes) and then trace the circuit backwards and forwards through each termination and bulkhead you'll be on your way to a new career in frustration. I've spend hours on just one problem, so keep at it and use logic. Walk away when you get frustrated and come back later with a clear mind.

If you have just installed a new wiring harness, do not make the mistake that it perfect. I've found wiring issues with brand new harnesses. Use an ohm meter to make sure end-to-end continuity is correct. I once had a wire broken in the middle of a new harness and had to run another lead.