Blower Relay/Switch Location

2002 BUICK CENTURY
98 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
DBROWNHILL
  • MEMBER
  • 5 POSTS
Where are the blower relay and blower switch located?
Apr 12, 2011 at 7:42 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
WRENCHTECH
  • CAR REPAIR CONTRIBUTOR
  • 20,761 POSTS
JDL is referring to an Auto Temp Control system. If you have a manual system, the high blower relay is built into the blower resister which takes the place of the module he refers to and fails quite often. That is located under the dash on the passenger side, next to the blower motor

Here is a guide that will help

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

Check out the diagrams (Below)

Please let us know what happens.

Cheers
Image (Click to enlarge)
Attached Media
Apr 12, 2011 at 9:03 PM
Advertisement
Avatar
DBROWNHILL
  • MEMBER
  • 5 POSTS
Thank you Wrenchtech for your replies!

I do have a manual system, and have already replaced the resistor, however the behavior did not change after this part was replaced; none of the blower speeds work at all. Is it safe to assume that the blower motor itself should be replaced?
Apr 12, 2011 at 11:02 PM
Avatar
WRENCHTECH
  • CAR REPAIR CONTRIBUTOR
  • 20,761 POSTS
Run power and ground directly to it to test. It sounds like the blower motor is bad.
Apr 12, 2011 at 11:08 PM