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post #1 of (permalink) Old 01-01-2001, 11:59 PM Thread Starter
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Heater problem found (I hope!)

I have been having problems every since the blazer heater motor upgrade. It would work for a while then would pop the fuse. Yesterday I was going to by-pass the wiring and run a hot wire and a toggle switch so I would have some heat. We hooked a wire from the battery to the motor to test it and it fried the wire. Hmmmm. My friend said the motor must be bad. NO, I screamed, I just replaced it! Thought the first one was bad so I put another one in. PITA. We got to looking and the "spade" on the motor was touching the firewall, direct short! A little grinding, some sillycone and Ta-Daa, it worked great! Seems it would bounce around and make contact with the firewall and pop the fuse. I wheeled in a t-shirt in 4" of snow (what a blast we had!) and 20 degree weather today. For the first time in a long time my jeepchick was warm in that "cold-ass" jeep of mine! All in all, a great day! If I had a butt kicking machine I would be wearing it out on myself for not finding this sooner...

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post #2 of (permalink) Old 01-02-2001, 12:28 AM
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Re: Heater problem found (I hope!)

Did you use the Siemens PM-102E?

post #3 of (permalink) Old 01-02-2001, 07:26 AM
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Re: Heater problem found (I hope!)

My dad once bought a rebuilt blower motor that had sparks coming out of it. He took it back for another that didn't.

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post #4 of (permalink) Old 01-02-2001, 10:28 AM
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Re: Heater problem found (I hope!)

My blower upgrade placed my hot wire spade dangerously close to the firewall also. Down and to the inside.
Funny, with all the write ups, no one ever mentioned this .....
I put a waterproof style connector on mine, the kind with the hard plastic sheath that covers the whole spade.
Another tip: Use the lower left hand housing bolt (the one that comes through the firewall under the battery) as a ground wire terminal. I ran a black 10 Ga lead from it to my ground bus bar. CJDave would be proud of me!
The only draw back to the upgrade is that now my heater sounds like a wind tunnel!

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