M931a2

[Glen Grenon]

I have a 1990 M931A2, serial# 3103179. I'm in need of a wiring schematic. Water got into part of the 63 pin coupler on the right side of the rig under the dash. It burnt one wire that I know of and now the e-brake won't release. The number on the wire is 3A. I could use some help!

 

[bachman502]

You can find it here http://www.jatonkam35s.com/M939-5 tons/M939TMs2012/TM9-2320-272-23-5.pdf

 

[simp5782]

I have a 1990 M931A2, serial# 3103179. I'm in need of a wiring schematic. Water got into part of the 63 pin coupler on the right side of the rig under the dash. It burnt one wire that I know of and now the e-brake won't release. The number on the wire is 3A. I could use some help!

E brake has nothing to do with the wires. Unless you mean the buzzer wont quit buzzing

 

[Glen Grenon]

Thanks for the reply. No, the buzzer shuts off when its released. Did you send the wiring schematic ? If so thank you very much! I've been working on tractors most of my life but this is a different beast. Did they use fusible links instead of fuses? The way that wire burnt was just like a fusible link. The problem may lie else where. The brake issue only started after that wire burnt and I noticed that 3A wire goes to the alternator which my have grounded to the pin housing. I really appreciate your help. Thank you!

 

[Andyrv6av8r]

If you are referring to the park brake by the seat, it has a cable going underneath to the mechanical brake. The air switch under the handle works the air park brakes. There are no electrics involved, as Wes said.

 

[74M35A2]

When wires are over-loaded with current, they become fusible links. Too many amps.