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96 dakota 3.9 AC/heater blower motor intermittently stops working

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Old Sep 6, 2016 | 05:37 PM
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Default 96 dakota 3.9 AC/heater blower motor intermittently stops working

Hey everyone, Ive got a 1996 Dakota 3.9 v6 2 wheel drive auto extended cab and the blower motor just up and stopped working yesterday when running the AC......I had just came out of the hardware store and started the truck with AC on, all worked well for about 2 minutes while checking messages on my phone and also all worked well up until this happened.....Them boom, the fan just stopped, I moved the switch back and forth many times with no success......Just put the windows down and drove the truck home.....checked fuses, all look good, also removed large fuse under the hood.......Finally gave up, then came back outside about an hour later......The blower motor worked fine for roughly 10 seconds then quit again.......Has not came on once since yesterday.....

Thanks

Mike
 
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Old Sep 6, 2016 | 06:44 PM
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Originally Posted by 66 buick guy
Hey everyone, Ive got a 1996 Dakota 3.9 v6 2 wheel drive auto extended cab and the blower motor just up and stopped working yesterday when running the AC......I had just came out of the hardware store and started the truck with AC on, all worked well for about 2 minutes while checking messages on my phone and also all worked well up until this happened.....Them boom, the fan just stopped, I moved the switch back and forth many times with no success......Just put the windows down and drove the truck home.....checked fuses, all look good, also removed large fuse under the hood.......Finally gave up, then came back outside about an hour later......The blower motor worked fine for roughly 10 seconds then quit again.......Has not came on once since yesterday.....

Thanks

Mike
Corroded terminals on the resistor block screwed in to the passenger side firewall in the engine bay, is my guess.
 
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Old Sep 8, 2016 | 12:09 AM
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Thank you sooooo much Tbugden, that was the exact problem.. Mine was super corroded and actually cracked on the top half of the plug in...I cleaned up the connection with some Pepsi and a wire brush, then put a little grease on all the tabs....plugged it back in and it works flawlessly now....

Thanks again

Mike
 
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Old Sep 8, 2016 | 12:33 AM
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Originally Posted by 66 buick guy
Thank you sooooo much Tbugden, that was the exact problem.. Mine was super corroded and actually cracked on the top half of the plug in...I cleaned up the connection with some Pepsi and a wire brush, then put a little grease on all the tabs....plugged it back in and it works flawlessly now....

Thanks again

Mike
Yes, but not for long (although "not for long" may be a few years, TBH.)

PROPER fix would be to replace the resistor AND the plug at the end.

And have the blower motor checked; when they get old and start to fail, they can pull extra current, which causes extra heat, which causes oxidation of the contacts, which causes extra heat, which causes MORE oxidation, which causes extra heat, which causes ... "Lather, Rinse, Repeat."

RwP
 
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Old Sep 8, 2016 | 01:50 AM
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Originally Posted by 66 buick guy
Thank you sooooo much Tbugden, that was the exact problem.. Mine was super corroded and actually cracked on the top half of the plug in...I cleaned up the connection with some Pepsi and a wire brush, then put a little grease on all the tabs....plugged it back in and it works flawlessly now....

Thanks again

Mike
You got it man. Mine was the same way and I did what you did. It worked for a while but then stopped again. Replaced it with a cheap duralast resistor block...$15 maybe???...it's worked perfectly for two years. Made sure to put dielectric grease on it to avoid the same thing happening again.
 
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Old Sep 8, 2016 | 10:41 AM
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Just a tip if you don't have anything else petroleum jelly is your friend. It helps get tight fitting rubber things to go together and works as a stop gap dielectric grease and rust inhibitor. Thinks less is more when using it.
 
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Old Sep 8, 2016 | 03:18 PM
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Again, thank you all.....I LOVE this truck but it has many glitches that obviously no one was concerned with before I purchased it.....Now I'm trying to perfect a 20 year old truck........I will go to autozone, get, and replace the block; Does any autoparts store offer a universal wire splice plug in or is it a junkyard only item?

Thanks

Mike
 
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Old Sep 8, 2016 | 07:02 PM
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RockAuto Is Your Friend:

http://www.rockauto.com/en/catalog/d...onnector,10138

(Although, with the numbers, you can find them elsewhere.)

BIG hint: Don't crimp. Use heat shrink (mobile grade with the adhesive is preferred) and solder the wires. SECOND hint: Don't match colors necessarily; match the position of each wire.

RwP
 
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