2004 Cadillac CTS Ignition Will Not Turn Off Completely

This 2004 Cadillac CTS came in with the complaint that the ignition switch would not fully turn off. The engine started and ran normally and could be turned off but the key would stop rotating as if the shifter was still in gear. As a result the battery would go dead. First things first if … Continue reading “2004 Cadillac CTS Ignition Will Not Turn Off Completely”

GM Cars & Trucks 1960’s, 1970’s & 1980’s, Blower Inoperative Erratic

This vehicle came in with the complaint that the blower motor would work sometimes but recently it had gotten to where it did not work at all. I hardly ever see vehicles this old in my shop anymore. This is one problem that I have fixed dozens if not hundreds of times over the years … Continue reading “GM Cars & Trucks 1960’s, 1970’s & 1980’s, Blower Inoperative Erratic”

2011 Cadillac DTS, Battery Goes Dead Overnight

This 2011 Cadillac DTS came in with the complaint that the battery will go dead if the car sits for more than 12 hours. I traced the drain to the Driver’s Door Module fuse (DDM)  in the rear underseat fuse block.  I used an amp meter connected in series between the battery negative terminal and … Continue reading “2011 Cadillac DTS, Battery Goes Dead Overnight”

2000 Cadillac DeVille, B1009 Anti Theft Warning Message and Security Light On

This 2000 Cadillac Deville came in with the complaint that the anti theft system lights and messages were on but the vehicle always cranked up just fine. Of course when the vehicle was dropped off at my shop all of the lights were out and everything was normal.   I did a code check and … Continue reading “2000 Cadillac DeVille, B1009 Anti Theft Warning Message and Security Light On”

1998 Cadillac Deville, Passenger Side Vents Hot with A/C On

This 1998 Cadillac Deville came in with the complaint that with the a/c on there was heat coming out of the passenger side vents. Codes B1340 and B1341 were present in the HVAC system. Both codes are for faults with the air mix door actuators. The B1340 is for air mix door #1 (driver’s side) … Continue reading “1998 Cadillac Deville, Passenger Side Vents Hot with A/C On”

2000 Cadillac DeVille, Runs Poorly Code P0102

This 2000 Cadillac Deville Came in with the complaint of running poorly and a code P0102 was present. The customer had already replaced the MAF (mass air flow) sensor and tried to replace the harness connector. Why anyone would consider this a repair is beyond me. Looking at MAF data, the grams per second and … Continue reading “2000 Cadillac DeVille, Runs Poorly Code P0102”

2001 Cadillac Deville, Driver’s Side Air Stuck, B0408

This 2001 Cadillac Deville came in with the complaint that the driver’s side vent temperature stays hot all of the time. I checked codes in the instrument panel module and found a code B0408 stored for a fault in the air mix one actuator. With the B0408 code the problem could have easily have been … Continue reading “2001 Cadillac Deville, Driver’s Side Air Stuck, B0408”

2000 Cadillac STS, Door Locks Cycle Up & Down While Driving

This 2000 Cadillac STS came in with the complaint that the power door locks would not work from the driver’s power door lock switch  and that the door locks would cycle up and down while driving down the road. All other functions on the driver’s door worked fine. It took me a little while to … Continue reading “2000 Cadillac STS, Door Locks Cycle Up & Down While Driving”

2001 Cadillac Deville DTS, Passenger Side Air Stuck on Cold

This 2001 Cadillac DeVille DTS came in with the complaint that the passenger side air was stuck on cold. There was a code B0429 stored in the Instrument Panel Module. B0429 relates to a fault with the passenger temperature door actuator assembly. To gain access to the passenger side temperature door actuator the glove box … Continue reading “2001 Cadillac Deville DTS, Passenger Side Air Stuck on Cold”

2003 Cadillac Deville, Blower Does Not Work

This 2003 Cadillac Deville DTS came in with the complaint that the blower motor does not work most of the time. Sometimes it will blow but it seems to blow slower than it should. Using a test light and a jumper wire, I connected one end of my test setup to the purple wire. Then … Continue reading “2003 Cadillac Deville, Blower Does Not Work”