Hi,

I have a 90 isuzu trooper that I can't get to start. when it was running I was having a condition where the dash lights didn't completely go out. the truck was running ok so I kinda ignored them. Now I have been having trouble with the mechanical timing jumping. On the last repair where I changed the timing belt abd the truck went down for repairs the starter was turning and the truck would somewhat start. Now I have finished the timing belt work but not the trooper doesn't even try to start. I get no response from the starter. I have bypassed the clutch safety swith to take it out of the equation. I have changed the starter relay with no change. The starter relay does click but nothing happens. I took the starter relay out and found which wire goes to the selenoid and I also found out which wire is hot when the key is turned to the "start" position. I jumped those 2 wires and the starter cranked. The engine didn't start I suspect because the fuel pump relay isn't geting power. I suspect something related to the starter relay. I have looked at a few wiring diagrams and I am not sure which wires go where in the whole starting circuit. A basic wiring diagram for the starting circuit would help.

thanks

mike