Fan Blower Wire Plug?

DareDog · December 30, 2020

2005 1500 5.3L HVAC blower some times will not turn on. under passenger side dash there is a plug and if I wiggle it will work. I think its special plug? where do i find one? would dealer parts show it and have it?

tbarn · December 30, 2020

Part Number	Description	Qty/ Vehicle
15862656	Connector	1
89019088	Resistor, Blo Mot (A/C & Htr)	1
89019089	Resistor, Blo Mot (Heater Only)	1

CJ3 or C42 hvac systems

Edited December 30, 2020 by tbarn

Mr. Z71 · December 30, 2020

DareDog,

Here's a link to a TSB on what your problem probably is and how it is resolved...

https://static.nhtsa.gov/odi/tsbs/2012/SB-10038760-3962.pdf

This TSB will give you a little insight on the history of this issue, however, warranty info will not apply due to age.

Also, you can find these connector/pigtails and resistor modules on eBay. Do an eBay search for 15862656.

Edited December 30, 2020 by Mr. Z71

DareDog · December 31, 2020

Could i just remove plug and direct wire it?

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Mr. Z71 · January 2, 2021

Long story made short... no. It would be very difficult to wire direct. The seven pin connector plugs into the resistor module and you would have to connect each wire to the terminals of the resistor module.

DareDog · January 2, 2021

13 hours ago, Mr. Z71 said:

Long story made short... no. It would be very difficult to wire direct. The seven pin connector plugs into the resistor module and you would have to connect each wire to the terminals of the resistor module.

ok, the plug has one bad wire in it. can see where it has gotten hot in the past. so I am thinking of just taking that one wire and splicing in a wire to from before just before the one end of the plug to other end. to avoid the plug then for just that one wire.so just that one wire is not in the plug. so is that still good idea?

Edited January 2, 2021 by DareDog

Mr. Z71 · January 3, 2021

You can try whatever you want, but be aware that you are dealing with a possible fire hazard. Check this video out to see what can happen...

https://www.youtube.com/watch?v=6eeG9zxCo7A

I opted to replace the connector and resistor module per the TSB for this reason on my '03 Sierra. Not saying that you will have a fire if you don't, just wanted you to be aware of what can happen.

Edited January 3, 2021 by Mr. Z71

DareDog · January 6, 2021

is it mainly the plug or resistor problem? plug here does not have any burn makes on it. should I still replace it though? thinking of just replacing the resistor with updated one.

Mr. Z71 · January 12, 2021

What generally happens is resistance builds up at the connector due to weakened contact force at the contact points of the terminals and/or corrosion at these points. As resistance goes up, so does heat. While you’re doing it, I would replace the resistor module and splice in the new connector pigtail for no more than they cost then you know you should have a good connection with minimal resistance.