Every time I turn the key to the on position I blow the EFI fuse. I'm at a total loss on this thing. First time it did this I was about 3 miles down a trail at the bottom of a hill and took 6 hours to drag it back to the road. I've searched and searched all over the internet and the only thing I could come up with was either bad fuel pump or bad circuit opening relay. Here's what I've done so far:
-followed all wires looking for pinch points or shorts
-swapped the 2 large relays under hood
-checked ground wires
This is where it gets confusing:
-I unplugged the fuel pump harness from the tank and then turned the key. EFI fuse did NOT blow. So I thought "must be a bad pump". Then I plug the harness back in to see if it would blow the fuse again. Truck fired up and ran. Drove it about a mile and it blew the fuse and cut off. Pulled it home.
-Unplugged the Circuit Opening Relay from under the dash. After I pulled it out I turned the key. Truck did NOT blow a fuse. Plugged it back in and it DID blow fuse. Then I took the relay and banged it on the toolbox a few times and plugged it back in. Truck fired up and ran. Then I though "must be the relay then"
WRONG. Now it's blowing the EFI fuse as soon as I turn the key even with the circuit opening relay AND the fuel pump unplugged. I'm at a total loss on this. I guess they are saying a "big" snow storm is headed our way and I'd like to make another attempt to fix it so I can take it out.
If anyone has any suggestions as to something I could try I'd really appreciate it.
Thanks
-followed all wires looking for pinch points or shorts
-swapped the 2 large relays under hood
-checked ground wires
This is where it gets confusing:
-I unplugged the fuel pump harness from the tank and then turned the key. EFI fuse did NOT blow. So I thought "must be a bad pump". Then I plug the harness back in to see if it would blow the fuse again. Truck fired up and ran. Drove it about a mile and it blew the fuse and cut off. Pulled it home.
-Unplugged the Circuit Opening Relay from under the dash. After I pulled it out I turned the key. Truck did NOT blow a fuse. Plugged it back in and it DID blow fuse. Then I took the relay and banged it on the toolbox a few times and plugged it back in. Truck fired up and ran. Then I though "must be the relay then"
WRONG. Now it's blowing the EFI fuse as soon as I turn the key even with the circuit opening relay AND the fuel pump unplugged. I'm at a total loss on this. I guess they are saying a "big" snow storm is headed our way and I'd like to make another attempt to fix it so I can take it out.
If anyone has any suggestions as to something I could try I'd really appreciate it.
Thanks