NateCrisman
Well-known member
Ok guys, this is for #139/1000. I just put the car together and got it running, but the alternator is not charging. The alt has been relocated to the rear of the block with a Jay Racing kit, so the wiring has been redone.
The Alt came from my previous GVR4, which was working fine as of May when I took it apart to start rebuilding this shell. If the Alt went bad, it happened while sitting on a shelf. I did nothing more to it than shoot it with some carb cleaner to remove some oil grime before putting it on the engine prior to installation.
Alt has 3 wires:
large double white wire. goes from the Alt post to a 100amp fuse, then to the battery + terminal. I get the same battery voltage at every point along the + line from Alt post and both sides of the fuse terminals.
Yellow wire. fairly thick. It goes to a pink fuse link in the engine bay fuse box. I get battery voltage at both ends of this yellow wire (alt plug and inside the fuse box).
Small white wire. This is T'd into a white wire that runs from the front engine fuse box alternator relay, along the front chassis harness, then into the drivers footwell behind the interior fuse box. I have tested continuity on this wire to the pin of the alt relay, so the wire is good.
Im not 100% sure how the alternator relay inside the front fuse box works. When you unplug the relay, there are 3 male pins going into the fuse box, with a 4th that is cut short. But if you take the fuse box off the car, looking from the bottom there is only the small white wire (mentioned above that goes to the Alt plug) and a black/white larger wire. The 3rd pin has no wire. What does that little black box do? If it's bad will it cause the Alt to not charge? Is there any way to test that thing?
I really want to cover every base I can before having to pull the alternator and swap for another, it's going to be especially pita since it's now jammed behind the engine. As pita as changing an AC compressor.
Any help or suggestions appriciated.
The Alt came from my previous GVR4, which was working fine as of May when I took it apart to start rebuilding this shell. If the Alt went bad, it happened while sitting on a shelf. I did nothing more to it than shoot it with some carb cleaner to remove some oil grime before putting it on the engine prior to installation.
Alt has 3 wires:
large double white wire. goes from the Alt post to a 100amp fuse, then to the battery + terminal. I get the same battery voltage at every point along the + line from Alt post and both sides of the fuse terminals.
Yellow wire. fairly thick. It goes to a pink fuse link in the engine bay fuse box. I get battery voltage at both ends of this yellow wire (alt plug and inside the fuse box).
Small white wire. This is T'd into a white wire that runs from the front engine fuse box alternator relay, along the front chassis harness, then into the drivers footwell behind the interior fuse box. I have tested continuity on this wire to the pin of the alt relay, so the wire is good.
Im not 100% sure how the alternator relay inside the front fuse box works. When you unplug the relay, there are 3 male pins going into the fuse box, with a 4th that is cut short. But if you take the fuse box off the car, looking from the bottom there is only the small white wire (mentioned above that goes to the Alt plug) and a black/white larger wire. The 3rd pin has no wire. What does that little black box do? If it's bad will it cause the Alt to not charge? Is there any way to test that thing?
I really want to cover every base I can before having to pull the alternator and swap for another, it's going to be especially pita since it's now jammed behind the engine. As pita as changing an AC compressor.
Any help or suggestions appriciated.