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New to us 99 TJ with wiring problems.

Wheelin66bronco

Pure Blood
Joined
May 20, 2020
Member Number
447
Messages
735
Loc
Star Valley, Wyoming
My wife loves jeeps, so she just bought her second one. 1999 TJ with the 2.5/5spd.
I noticed right off the bat someone has bypassed and redone all kinds of wiring with the charging system.
I'm looking for a schematic for it, especially the charging system.
Are these things prone to wiring gremlins, common bad spots in the harness?
The alternator charges when cold, not when hot, but the 12v exciter is gone when hot so I don't think it's the alternator. What's the vertical two post module at the back of the front fender well? Harness has been bypassed from the relay to that module, and back to the alternator 2 pin exciter plug. Green/orange, green.
The ECU has been replaced in the recent past also.
 
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