Blower Motor Running with No Key
#1
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Blower Motor Running with No Key
I recently removed the dash and replaced a leaky evaporator core (and heater core) to get my AC working again. I also replaced the blower motor resistor (BMR) since it had partially melted the connector.
The old BMR wasn't 100% faulty (just found parts rattling inside) and I have not changed the blower itself.
Any idea why the blower would run with no key in the ignition, AC controls are also in the off position? When I start the engine, the blower has no speed control and sometimes pulses.
Any help would be greatly appreciated, a week project has turned into 5 weeks and going.
The old BMR wasn't 100% faulty (just found parts rattling inside) and I have not changed the blower itself.
Any idea why the blower would run with no key in the ignition, AC controls are also in the off position? When I start the engine, the blower has no speed control and sometimes pulses.
Any help would be greatly appreciated, a week project has turned into 5 weeks and going.
#2
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It appears both Blower Motor Resistors are toasted -- assuming this would point to a tired blower motor that still works but is pulling too high of a load.
I'm thinking of replacing the Blower Motor and the Blower Motor Resistor (again) but is a ($300) mistake if I end up toasting them.
Anyone have some guidance on how to test if there is a short or something in the wiring causing issues?
I'm thinking of replacing the Blower Motor and the Blower Motor Resistor (again) but is a ($300) mistake if I end up toasting them.
Anyone have some guidance on how to test if there is a short or something in the wiring causing issues?
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#5
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Hmmm weird. That is a common problem with the ZJ's. Mine did it too so i have first hand experience. Did the original one do it?
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i had one intermittent issue with the original - but the AC has been down for about a year. When I replaced the evaporator core I found the harness partially melted for the BMR which was why I decided to replace it as part of the project. THe new part worked for 1 day, reinstalled the original and also worked for about a day. Could be that the blower is pulling too much load, I did remove and inspect while I had the cooling "box" out of the Jeep. I didn't see buildup and it spun feely by hand so I chose to reinstall it. Appreciate the help.
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