[Rooster]

I plugged the car in today, and tripped the cicuit breaker 5x .
Then i grabbed wifes hair dryer to see if same would happen, but worked fine.
Then tried different extension cord works fine, maybe there was moisture in the cord
or the exterior outlet, Is there a way to test the coolant heater , is it possible to blow a fuse ? Seems to me it's not warming up like it used to.

 

[pileofparts]

If I'm reading it right you said the other extension cord works fine? Isn't the problem solved? I do know that the longer the extension cord the bigger the voltage drop.

 

[Rooster]

Yes, it seems to be working as far not tripping the circuit breaker.
Just not sure the coolant heater is working, seems to take a little more time to warm up, as if maybe it shorted out the heater.