Canadian Hummer Club Forums

Okay - if I jump power to Ignition Supply to Exterior Fuse Box , fuses 2A, 2B, 3B then the vehicle runs properly. The "run" on the iginition switch does nothing. I have no documentation on it and the ignition schematic is not in the service manual.



It is the light green wire on pin 68 , circuit 16 (left firewall header)

find the starter relay.one of the three relays in front of exterior fuse box. find hevay blue wire (solinod wire ) power it dose it crank

cheak yellow thats power i think

what happend to your truck it was perfect when you got it . hubs included..

Its possible your Nuetral Safety Switch is going in the shift lever setup. Try starting while pulling the shifter towards you or wiggling it around while cranking. Mine has been gone for years and i must pull the shifter towards me or the starter will not turn at all. Its like having a completely dead truck. Also a nice security features in some respects. There have been a few times i have chuckled watching the pros try to start it after oil service and i have been told i need a new starter only to go and fire it up in front of them with jaws on chest.

The vehicle cranks fine. The systems (glow plugs, lift pump, etc) are not getting power now.



BTW, the neutral safety switch was a problem too but fixed now. So the engine cranks but nothing else has power, hence the ignition circuit. Do have have an electronic version of the ignition switch circuit?

Thanks Roy for sending a picture of the ignition switch. Now I need FO-15 (page where the ignition wires go).\