Question about 2005 Buick LaCrosse
Replaced relay. Must be blower motor. where is it located?
Blower operation is handled by the HVAC control module which gets its power from the 10A HVAC fuse in the instrument panel fuse block. There is a blower motor control processor that gets its power from the 30A BATT MAIN 4 fuse in the underhood fuse block. The HVAC control module sends speed signals to the blower motor control processor which turns on the blower motor at the selected speed. Note that there is no relay involved. If you check the fuses and check the path to the blower motor you may find that the motor is OK and the trouble is somewhere else
Posted on Oct 16, 2012
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Posted on Jan 02, 2017
There is a bulletin for this fix.The bulletin number is 05-01-39-001A.This pertains to the blower motor staying on after key is shut off.What you will have to do is replace the blower motor resistor module and install a capacitor in the wiring.Part number is 25073556 for the capacitor.The blower motor is on the right side under the dash.Just remove the insulator panel and you should be able to see it if you look up into the dash.Or turn it on and listen for the blower motor.Disconnect the connector to the blower motor control module.Find cavity a and c.Cavity a is negative and cavity c is positive.C is red and A is black.Splice the positive lead of the capacitor to the red wire and the negative to the black wire.You should use splice sleeves and solder the wire on.Hope this helps.Good luck.
Posted on Dec 19, 2009
I just replaced the blower motor resistor on my 2003 Rendezvous. I bought the resistor at the GM dealership for $48 (AC Delco). The part number was 25928168. The fan now works in all five speeds.
For electrical parts, I only trust the dealership for the latest revised components.
Posted on Aug 26, 2011
For most common location, open hood and look near cowl for a plug near the air conditioning box just forward of the windshield wipers. It should have several wipers and the resistor itself protrudes downward into the box held in place with two screws. Screws have 7mm, 8mm, or 1/4 inch hex head.
If not: look near blower itself under the dash on the passenger side. The resistor should protrude upwards into the HVAC housing near the blower.
Posted on Sep 17, 2009
Testimonial: "That was quick! Thanks! Perhaps in passenger compartment versus engine compartment!"
There are 2 relays for the blower. The low blower relay and the high blower relay. They are both located
under the hood in the center of the firewall.
The low will have 4 wires from it, one lt. blue and 3 brown. The high will have 5 wires 1 purple(to blower mtr.) 1 black 1 dk blue 1 red and 1 orange.
Also, the blower resistor is in the same area if needed. Hope this helps.
Posted on Feb 11, 2010
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