Hi,

Would you believe jumping the fuel pump relay did cross my mind. I have read about these alternators in troopers. They can charge the battery fine but be bad. The alternator turns off the panel lights. If jumping the fuel pump relay lets the trooper run is there anything else in that circuit besides the alternator that would cause this problem??? From what I have heard you can't put an aftermarket alternator in these troopers because of this circuit. The alternator has to be from isuzu. I'll let you know what I find out. Thanks again for all the help finding the short with the starter and engine relays. The diagrams were a great help.

Mike