Electrical problems after heater core replacement
Vehicle: 2000 XJ 4.0, 4x4, Sport.
So I completed the heater core replacement job, and also replaced the evaporator while I was in there. Re-installed the dash and am getting pull-my-hair-out electrical issues. The only issue that was present prior to doing the work is fault code P0135. The jeep starts and runs fine, but here's what's happening:
1. Rear defroster switches off immediately after pressing the switch. It should, as I recall, stay on for a short period of time before shutting itself off.
2. Starts and runs fine, but when the headlight switch is pulled out, the tachometer is intermittent, the rear defroster switch lights up solid, the rear window wiper runs constantly.
3. Fault codes P1694 and P0135 are present.
I've double checked all connections, and have found no visibly damaged wires or connectors. I have had trouble figuring out how the dashboard grounds to the chassis. I have a section of wire with alligator clips, and I connected a bare portion of the dash directly to the battery negative cable, still have same problems. I thought that maybe the alligator clips didn't provide enough contact, so I made a much better ground cable that I will connect sometime soon. I spent 5 hours on this thing today, and have thrown the towel in for the night.
It's probably a longshot that anyone has experienced similar problems, but any advice will be appreciated.