M1079 electrical help please.

[K10A]

Well it seems to be just bad dash relays and circuit breakers. I now have power to the dash and it will turn over good but won’t fire. I’m sure that’s from sitting for 3-4 years.

 

[Ronmar]

does the primer work/is it moving fuel?

 

[K10A]

So the primer was firm. We just jumped the fuel shutoff solenoid and it fired right off. It is not getting power. The “stop” emergency light on the dash cluster stays on. Is there a low coolant switch?
The coolant is super low.

 

[Ronmar]

No low coolant switch.. power flows thru CB79(same CB that powers the trans controller), Thru the de-energized contacts(30-87A) of relay K19, the start inhibit relay(allows cranking without starting for maintenance after you push the button in the power panel). From there it’s right on down to the run solenoid… This is one of those places where a 4 pin relay in a 5 pin socket will mess with you. Does K19 have a 5 pin relay in the socket?

 

[K10A]

Well we got working relays and breakers in all the right holes and it runs.
Now to fix the hydraulic system for the spare and cab.