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Yup. After sitting for 4 or 5 months plus that final two hour drive with no recharge the batteries were pretty weak. I'm just happy to have found the short. Gracious day in the morning that was tedious.

Uh, negative Ghost Rider - it was the wire not the fusible link. The wire section in question had rubbed the firewall to failure. Fusible link intact.

When you troubleshoot make sure you don't get fixated on the idea that a certain thing is wrong - you might be wrong and waste a lot of time. I searched and searched and traced the fuel pump power. Never could find anything wrong. Out of frustration, I replaced the ignition switch - good...

Good idea. I pulled the dash and instrument cluster last night. I was going to replace the bulbs anyway ( I like to be able to see my gauges in the dark, I'm funny that way). It occurred to me that I should try to induce a current along the fuel shutoff wire from the key to shutoff...

Progress Update: Verified voltage on batteries. Verified voltage on fuel shutoff (0 volts - but when a jumper is ran from to fuel shutoff it will pump and truck will attempt to start) Ran wire from bulkhead wiring harness block to fuel shutoff. No change. Clean and applied dielectric grease to...

Thanks, I tried that after I read your post. Didn't work for me. However, I think this is telling me the problem is from the bulkhead to ignition switch route.

I replaced the fuses today. I ran a new wire (temporary) from the wiring harness bulkhead plug to the fuel shutoff. No change in condition.

Thank you for the reply! I believe you are referencing the main fuse panel. I verified all my fuses are good, so there's something in between the fuse panel and the fuel pump shutoff solenoid.

1986 M1028. Purchased a few weeks ago, using as a farm truck, I need it badly right now, we are harvesting. I have previously owned an M1009. This unit had a snow plow on it and there are tons of extra wires running to and fro. I have removed as many as possible but they seem to reproduce or...