Blower motor works intermittently


Asked by Jan 08, 2016 at 03:31 PM about the 2004 Cadillac Seville SLS

Question type: Maintenance & Repair

My 04 SLS's blower motor works intermittently. Sometimes it works, most times not. Seems to be improved by jiggling the wires under the dash. Replaced the motor, did not correct the issue. My question, what does the schematic look like for this motor? It's a 3 terminal motor so I suspect it has an on-board transistor-diode pair for PWM operation of the motor. Tying the transistor gate (almost certainly a FET of some sort if there is a transistor) to one of the other pins should turn the motor on full blast which is fine by me. Anyone know whether it's a N-channel or a P-channel FET?

1 Answer


i had the same problem and ran a separate ground wire from the motor housing to bare metal under the blower has worked fine ever sense

Your Answer

Add photo

Related Questions

Search Cadillac Seville Questions

Cadillac Seville Experts

#1 Tom Demyan
Tom Demyan
Reputation 370
#2 carpetguy53
Reputation 310
#3 Js08016
Reputation 260
View All

Related Models For Sale

Used Cadillac DeVille"
2,377 listings starting at $1,495
Used Cadillac STS"
48 Great Deals out of 1,349 listings starting at $2,995
Used Cadillac CTS"
420 Great Deals out of 13,009 listings starting at $1,000
Used Lincoln Town Car"
49 Great Deals out of 2,364 listings starting at $1,542
Used Cadillac Escalade"
360 Great Deals out of 11,306 listings starting at $2,999
Used Chevrolet Tahoe"
1,074 Great Deals out of 36,043 listings starting at $1,700
Used Cadillac SRX"
690 Great Deals out of 10,136 listings starting at $2,500
Used Chrysler 300"
580 Great Deals out of 20,785 listings starting at $1,490
Used Chevrolet Impala"
935 Great Deals out of 35,693 listings starting at $1,500
Used Chevrolet Silverado 1500"
2,440 Great Deals out of 144,713 listings starting at $1,995