Massey 4200 series - wiring issue

patsy_mccabe

Another wiring problem.

A neighbour has asked me to look at his 4235 Massey as it's running down the battery.

When stopped, I'm getting 12.5v from the battery earth stub to the disconnected earth lead. That to me is a live earth somewhere but not enough to blow a fuse.

How can I trace the fault? I've taken out most of the fuses, disconnected the radio. No good. All wires seem impossible to trace.

Anyone have a wiring diagram?

FintanMcluskey

Alternator?

patsy_mccabe

No I disconnected the alternator and the 12.5v still there at the earth terminal of the battery.

DBK1

https://www.boards.ie/discussion/2058402217/massey-4200-series-wiring-issue

I was changing a deadman on one of the tractors here and realised I’ve the very same problem so I’d be interested if you find a solution to it. With the earth wire disconnected from the battery I’m still getting 12.5 volts if I put the multimeter on the positive battery terminal and to the chassis of the tractor.

patsy_mccabe

What do you get from the disconnected earth lead to the earth of the battery?

DBK1

https://www.boards.ie/discussion/comment/123263430#Comment_123263430

I didn’t check that. I’ll try it later today.

blue5000

I think some of the deadman switches aren’t great, try putting a vice grip or clamp across the cables to the deadman. They go rusty inside where the contacts are.