Originally Posted by
scottar
Yep. Need to look for voltage drop. Set to DC volts. Black lead on the black wire bolt terminal on the solenoid that comes from the battery. Red meter lead on the breaker posts, one at a time and push the switch. Should be 12 volts give or take and not drop much when switch is pushed. If this checks ok, move red lead to red wire bolt on solenoid that is connected to breaker and
try switch again.
If these read ok, put the meter probes on the terminals on the solenoid that connect to the winch and press the switch. Should see + volts when switch pushed one way and - volts the other. If the reading is 12 volts at this stage, it's a cable fault which we will confirm. If it's a lot lower, it's the solenoid.