I have an issue with my Ford 4630. When the key is in the starter position, the engine turns over fine. However, as soon as you release the key to the run position, it turns off. I ran a wire from the electric fuel turn off solenoid to the battery and the tractor continued to run after it started. It looks like a bad connection from the key switch to the solenoid. There is a color coded wire that runs from the solenoid to the engine harness connector and a similar colored wire that continues to the main harness. Somewhere there has to be a relay that switches the current from the start position to the run position. Does anyone have any suggestions?
- Thread starter RonaldK
- Start date
Destroked 450
Well-known Member
- Location
- Harned, Ky
Does your tractor have this fuse box located behind the battery.
If so it looks like fuse 7 is for the fuel solenoid.
You'll need a operators or service manual to find what relay does what.
This panel is from a 94 3930, I know the 98-99 fuse panels are different
I've encountered this on a '97 4630. There is a relay in the fuse block, there's also a Lucas diode in the wiring behind the instrument cluster. After a bunch of fussing around here and there, the multi-meter figured it out diode was bad. There were mice involved in this one, and they did chew insulation on a wire, that was part of the nest. Over the years it's been rare to have them do that, don't see it often. Something shorted and switched off the fuel shut off solenoid. The wiring diagram may help you on this.
Those darned things always head for that space behind the instrument cluster and above the fuel tank. They'll leave urine scent that is tough to clean off and they have a keen sense of smell and will always return as I have found numerous times whenever this tractor is outside tarped, usually goes in the garage. I cleaned one out a few weeks back and sprayed peppermint oil in there to ward them off.
I had the same results, when I ran a jumper to the fuel shut off solenoid, the tractor started and ran like it should, but the diodes fooled me, they are spade connectors that don't look like anything important, but they can and will fail. They act like check valves and don't let electricity backfeed as I understand it, so I am not sure why they are there, but must be for good reason. I was stumped for a bit on this, then it made sense after I got the full OEM set of manuals with diagrams. The diagrams are not the easiest to interpret and the manuals are a bit misleading when you try and pinpoint the area covering this on a 4630.
I had the same results, when I ran a jumper to the fuel shut off solenoid, the tractor started and ran like it should, but the diodes fooled me, they are spade connectors that don't look like anything important, but they can and will fail. They act like check valves and don't let electricity backfeed as I understand it, so I am not sure why they are there, but must be for good reason. I was stumped for a bit on this, then it made sense after I got the full OEM set of manuals with diagrams. The diagrams are not the easiest to interpret and the manuals are a bit misleading when you try and pinpoint the area covering this on a 4630.
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