Blower Motor Stays On ~ Key Out 1992 Eldorado

[91TexasSeville]

Okay, I know this is a fairly common thread, however I wish to add some information regarding the Delco Part Number and so on....

The 4 pin / 2 pin style fan control module only uses 3 pin / 1 pin of the harness connection. The Delco Part number is 16061602, however an aftermarket replacement may be configured as 3 pin / 1 pin, which should work just fine.

Since I still have my 91 Seville resting at the side of my shop, I had the exact replacement part which solved the problem for my 1992 Eldorado.

From what I have read in this forum, (thanks to you all) this part was last used in the 1993 model year where upon in 1994 therafter, the fan control module was incorporated into the fan motor unit.

The fan control module is located on top of the black plastic plenum to the left of the blower fan. Should yours decide to stay on with the key out of the ignition, you can "unplug" the larger of the two connectors to stop the fan. It will be the connector with the big purple wire.

When the fan module fails, it will either fail always on, or always off. Be SURE you check this item first. It is far less expensive than a new fan motor. With the summer months at hand, and fall soon approaching, it is likely someone else will experience this problem. This post is for you!

How it is wired.......

At the blower control module you should find a 2 pin connection and a 4 pin connection side by side. Only one wire serves the 2 pin connector, and only 3 wires serve the 4 pin connector.

Standing at the front of the car with the hood open looking at the fan control module from left to right

left side (passenger in this case) 2 pin connector
x - red
x - MT (empty)

right side (driver side in this case) 4 pin connector

x-MT......x-purple
x-black...x-gray/solid black stripe


Red = from 40A maxi-fuse block in the engine compartment right side to blower power control module left side. [2 pin connector]

Purple = from ACP Blower speed feeback input to blower power module and fan motor (this wire has a 10A fuse either in glove box, under dash, engine bay right side, or trunk depending on year model of Cadillac. [4 pin connector]

Gray/Solid black stripe = from ACP variable voltage ouput to blower control module. [4 pin connector]

Black= chassis ground for motor and blower control module. [4 pin connector]

[91TexasSeville]

Update:
The Delco part number is discontinued!
Aftermarket is Murray Factory Air Part #35953

[dar41]

Thanks to "91 Texas Seville" for posting information on the blower motor relay problem. Have a 92 Eldo with this problem and figured it could be the relay but it very helpful to know exactly where and what to look for. Thanks

[jjm01]

I know someone who can rebuild those blower modules - which list for $216 from the dealer - where you'll probably never need to replace the module again. The guy made the unit virtually indestructable (electrically that is).

The dirty little secret is the way the module was originally engineered, the module blows before the blower fuse. Typically the module and blower are replaced together.

[Roadmaster 92]

I'm having the same problem with my 1992 Buick Roadmaster Wagon. Since it is the same problem and the same model year, I'm guessing that it is the same part. Can anyone confirm this?

Assuming that it is; how can I get a hold of Murray Factory Air or the guy who rebuilds them?

[AMENCADDY]

Originally Posted by jjm01

I know someone who can rebuild those blower modules - which list for $216 from the dealer - where you'll probably never need to replace the module again. The guy made the unit virtually indestructable (electrically that is).

Would he share this info or is it just better to let him rebuild it? Either way I'd luv to know since mine is IO at this time. I have soldering skills and assorted components.