Question about 1994 Buick LeSabre
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
If yours is dual zone, I believe the resistor (blower control module) is a solid state. Did you check it using the fan speed selector and test the voltage output on the purple wire?
The gray black wire going into the resistor is a variable voltage output from the heater control panel. This signal is amplified by the resistor/blower control module.
The black wire out of the resistor also needs proper good ground.
There is a fuse in the underhood relay/fuse panel that feedback from the resistor output to the blower (purple wire) is also fed back to the heater control panel. Verify this fuse is good.
When blower motors go bad they will often absorb a lot of electrical current. This current has to go through the blower control/resistor and will often burn them out due to the heat developed from the high current load.
These resistors are also mounted in the airflow out of the fan motor to help cool them so if the fan is still drawing current and not blowing the resistor overloads and burns it out.
Not sure how you tested the resistor but I suspect yours is faulty.
If you would like more advise let me know.
Posted on Jan 05, 2010
Testimonial: "I was surprised to read the detail of the email. I know it takes time to do this and I really appreciate it."
There is a blower relay behind the glove box. This relay is your problem. The next time that the blower does not come on take your hand and bump the dash next to the glove box. The fan should come on. You have to bump it pretty hard. But 99 times out of 100 the relay is the problem.
Posted on Nov 30, 2010
Tips for a great answer:
Mar 25, 2015 | 1999 Dodge Stratus
Feb 19, 2015 | 2004 Chevrolet Monte Carlo
Apr 14, 2014 | 1997 Chevrolet S-10 Pickup
Oct 15, 2012 | 2005 Buick LaCrosse
Sep 25, 2012 | Cars & Trucks
Aug 13, 2012 | 2000 Chevrolet Venture
Oct 08, 2010 | 1998 Dodge Grand Caravan
Dec 16, 2009 | 2000 Jeep Cherokee
Nov 07, 2009 | 1991 Toyota Camry
25 people viewed this question
Usually answered in minutes!