It's one of two things on a Detroit, check valve at back of head or fuel pump that's behind the compressor. I've seen fuel drain back both ways....
Way too complicated for me
What do you do with that.
Something from the 80s???
Wtf is that
Hey good to hear man, glad it worked for ya.
Ya I said that like a dumbace, put the fuse close to the power source for the switch you put in, not the ecm harness. I said it backwards
Not very easy when the truck isn't in front of me
Ya I wish I could be better help
Ok then just run a simple power wire from your battery to the switched power side of your ecm harness just to test it and if it starts and run...
Not sure where that is exactly, does your radio turn on when you turn the key on??
Does the relay in the switch box click when you turn the key on
Did you figure it out
Oh and if you have power at the harness side and it still isn't working your ecm is shot. Don't know why it would be but it happens. Good luck.
There's the power locations on a 70 and 40 pin
[ATTACH] [ATTACH] [ATTACH]
I know it's a power to ecm problem because you say you have no check engine light when you turn the key on. If the check engine light doesn't come...
I think diesel Dave is talking about the main breaker, I've had that problem too but that shuts off all power to the truck. No power anywhere...
They are inline fuses with covers on them, kinda look like an electrical cover with a cap on them
They are not in the actual fuse box inside the truck, they are external
