Question about 1999 Cadillac DeVille
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Posted on Jan 02, 2017
SOURCE: 1999 Caddy Deville A/C problem
A/C systems are hard to diagnose without having access to the vehicle. One of the most common problems is undercharge (Not enough freon in the system) indicating a leak somewhere in the system. Other causes could be a burnt A/C compressor clutch fuse, defective compressor clutch, defective compressor/belt, defective High/Low pressure switches in the system, defective evaporator icing switch, defective wiring... Basically, you're better off getting the system diagnosed by a good A/C knowledgeable mechanic...
Posted on Aug 13, 2008
There's a blower motor (fan) under the hood and up against the firewall near the center of the car that takes some work to remove. It has gone out in the last 2 of my 4 Cadillacs. Turns out if you're not real careful with the positioning of the spark plug wires they will brush up against it, and if one of them gets cracked or brittle it will "arc" and short out the blower motor. The a/c compressor should still come on (you'll hear a click when it engages) but you won't get any air blowing into the cabin, hot or cold.
The part was like $200 stock (year 2000 prices) and it took about an hour to remove it. My Caddy at that time had this damn strut bar going across the engine bay which we eventually removed to get to the blower motor.
Posted on Apr 09, 2009
TPS throttle position sensor needs cleaning or replacment. or if you run the tank low on fuel you might be needing to replace fuel pump and filter.
Posted on May 15, 2009
looked it up online and looks like it's on the front of the water pump in a thing called the coolant inlet housing. one end of it looks something like the letter y and the other end, where the thermostat is round. hope that helps
Posted on May 30, 2009
Rear of the vehicle by the fuel tank...by the frame rail:
Disconnect the fuel feed pipe (1) at the in-line fuel filter and return pipe (2) near the in-line fuel filter
Squeeze the plastic tabs of male end connector of fuel filter
Posted on Apr 19, 2010
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