slantflat

Hi everyone.

My truck has been sitting awhile and I can't get it started. I thought it was the starter relay but I'm not getting anything when I turn on the accessory switch. No gauges, no low air buzzer, nothing. But the lights work. Very perplexing. Oddly enough my military vehicle forum isn't much help. I always get pretty sound advice on here, so I figured I'd see if anyone here knew.

Thanks everyone.

oldcutlass

What year is it and can you post the wiring diagram. I need a refresher, I worked on a few that were used as brush trucks, the were 24v.

oldcutlass

I found a wiring diagram, your problem is probably around the ignition switch. The lights run off a separate branch feed from battery power. So it looks like your either missing power to terminals A and C of the switch or the switch is bad.

MidNight Rider

yes, I agree with oldcutlass, if anything use a multimeter and ensure you have 24 volts at the slave cable port on the right side of the cab, if 24 volts is present, the probe wire 27 on the ignition switch and see if voltage is present there. if 24 volts is present, tuen the switch to the 'ON' position and then probe wire 95 for out put voltage. if 24 volt is not present, change ignition switch. like oldcutlass said, the switch powers everything up and I have seen this happen a couple times, burned out switch

slantflat

Thanks guys I'll check this out. I'll have to get out a magnifying glass to read that schematic. Thanks for finding that Eric. My TMs didn't have this. Odd.

oldcutlass

You can zoom in on it somewhat, my old eyes could not make out some of the wire numbers. Thanks midnight rider for that.