M998 fan clutch relay went up in smoke

[Scorch800rmk]

So the other night I started my hmmwv and then went inside to grab a few things while I let the motor warm up, Within a minute of walking inside I heard the engine die I turned around and walked out to find smoke pouring from the engine compartment. Long story short the fan clutch relay burnt up, I replaced it but still can't get the truck started. Glow plug light and normal voltage cycling seem to indicate glow plugs are operating like normal and it cranks but won't fire up. Any ideas? Do I have a bad PCB? It's the yellow labeld box that from what I've read it the one you want? I'm out of ideas and don't want to just start throwing parts at it to hope I get lucky.

 

[porkysplace]

This guide may help you.
[h=1]HMMWV A1 Troubleshooting[/h]

 

[Scorch800rmk]

Thanks for the guide, I'll give it a try tomorrow and see what I find.