92 XJSC/LT1: It never ends. Went to start the car but it acted like a dead battery. This is what I checked:
- Voltmeter says battery putting out 12.5 volts
- Load tester agrees with voltage but under load shows a bad battery. With cable removed, load tester shows good battery under load. I conclude the battery is good, but problem is with cable or downstream
- Ohm meter at positive cable at battery shows resistance suggesting positive circuit is grounded somewhere.
- Check the passenger side positive lug on the engine compartment firewall and it shows grounding somewhere.
- Remove all cables from that lug.
- None of the cables show grounding, suggesting it is nothing related to the motor.
- With cable to positive lug on drivers side removed from the passenger side, no grounding on the drivers side, again suggesting problem is between the positive circuit in the trunk and the passenger side firewall lug.
Today I will run an ohm test between the positive cable in the trunk, and the passenger side positive lug.
I could find nothing in the manual that covers the positive at cable, its routing, a replacement procedure [god help me] or the strange tap in the positive cable just before the terminal sporting two brown wires [where to they go?]
I’m guessing that the cable somehow feeds the dash before it reaches the firewall lug, so the problem could be there I suppose.