Problem with My 2005 Pontiac Grand Prix
3800 V6 Series II
Replaced New blower motor

tip/donation yes
GM tech = JK
question = The blower motor stopped working in my '05 Pontiac Grand Prix.  Using my
volt meter, I checked for voltage at the blower.  With the fan set to the highest setting, I
saw 12 volts so I thought the blower motor was bad & replaced it.  The new motor ran
for 5 seconds then stopped.  Still getting 12 V at highest setting and 6V at lowest fan
setting.  I've read that if the resistor goes bad, the fan will operate only at the highest
speed, however mine doesn't operate at all.  Any suggestions?






JK:
Your system works a little different. No seprate circuit for high only.
The blower resistor / control module controls all speeds, and the ground for the blower-
circuit 2150 BLK wire.
Need to put the volt meter, or better yet a test light, in the blower connector. Test light
will light if you have power in and ground. Sound like you probably wont.
(See atached schematic)
Sounds like the resistor / module is bad. Also check the plug on it for burned terminals.
The module also has a ground behind the radio on the cross beam.
Blower Motor Speeds Problem