5045 E blowing key switch fuse

[rnccen]

Jd 5045 E keeps blowing 30A key switch fuse, I saw some other posts about disconnecting temp sensor aka cold advance switch in the thermostat housing but this tractor doesn't have a cold advance switch there.

Anyone know if they put it somewhere else?

Tractor is sitting in a field in Texas, just trying to get it started and back to the barn where tools are.

Thank you in advance

 

[Tx Jim]

I'll bet your tractor has a cold start relay somewhere. What is your tractors serial range? Example 143xxx or 129xxx

 

[Harry in Ky]

You must have a common rail system and it probably doesn't use a cold start circuit. They have other means of monitoring and dealing with temperature changes. If you're blowing fuses the problem could be most anywhere.

 

[beenthere]

Put a lightbulb in the place of the fuse that blows. The light will act as a fuse until you locate the grounded wire in the circuit. Then start moving wires around and unplugging or disconnecting things until you hopefully find the culprit (light goes out).
Has been a fuse-saver for me several times.

 

[rnccen]

Dealer confirmed no cold start for this version of the 5045e. Ill try the light bulb, local dealer is 6 weeks behind in service. I can't wait for them.

If anyone else has any hints tips tricks, I'm open to suggestions.

 

[Harry in Ky]

There really are no tricks. It's blowing just the one fuse? If you can't find any physical damage to wiring,(as in rodent nest residue) you need to first determine what all circuits that fuse supplies. Then you start following the easiest ones first. Look for wire issues anywhere, then start unplugging various electrical components until you locate a short to ground type of situation. It helps to have book with wiring diagrams and component locations.

 

[5030]

If you employ the light bulb trick just make sure you locate the bad wiring quick or the unit might start afire.