Wipers and heater motor blowing fuse after running a minute or two.

[Jim S]

When I turn on either the wipers or heater (or both) the fuse will blow.  I replaced the fuse with a 30 amp breaker and that will trip after a minute or two.  The guages and shifter light are on the same circuit.  Is it because the motors are old and pulling too many amps? Any suggestions to keep them safely running?

Edited 20 hours ago by Jim S
Mispelling

[mfg]

4 hours ago, Jim S said:

When I turn on either the wipers or heater (or both) the fuse will blow.  I replaced the fuse with a 30 amp breaker and that will trip after a minute or two.  The guages and shifter light are on the same circuit.  Is it because the motors are old and pulling too many amps? Any suggestions to keep them safely running?

I’d guess motors need lube.

[Jim S]

I forgot to mention, both motors run fine for a minute or so before the circuit trips.

[Gunslinger]

Did the problem begin at the same time with the two motors?  If so there might be some kind of cross-connection in the wiring creating an overheating issue requiring the circuit breakers or fuse to trip/blow.  

I would check all the ground connections as well as connections to the fuse box.  After so many years the connections could be corroded making for overheating of the wires.  

The motors themselves might need overhauled...maybe the wiring harness itself has become suspect and required replacing.