Engine 1 fuse
I have a 2004 Dakota 4.7l. The engine 1 fuse blows going down my driveway. It's a bit rough but Baja rough. I take it easy. The engine 1 fuse blows 2 or 3 times going down, only about 300 feet long. I've checked all connections to coil packs and injectors. It only happens on my property, any other downhill is fine. No codes are shown. Swap the fuse and it starts and drives just fine. There's no way to reproduce this for a shop. Any ideas???

 

That's for the ASD relay...... both main power feed, and control circuit power feed. Try swapping the ASD relay for another one..... Horn relay would work, I do believe.

 

I bought 2 new relays. The problem got worse. In the picture you can see which new 2 relays I installed.

 

If I shake the front of the truck side to side it dies. We shook it several different directions. Only side to side made it die and blow the "engine 1" fuse.

 

You have a harness rubbed through somewhere, that is grounding out. Since the same fuse power both the control circuit, and the rest of the crap after the relay.... It could be anywhere.....

 

The best we've come up with is when we move the wire harness that goes above the bell housing and the fuse blows. I'm screwed. Thanks for your advice though.

 

Put it on a lift and see if the oxygen sensor wires are shorted/melted to the exhaust pipe. Otherwise it might be something up on top melted to the back of the intake manifold.

 

Connector at the trans as well...... Maybe.