Expert: Rob Painter - 1/31/2011

Question
i have a 87 Fleetwood and the climate control wont come on. replace blower motor still wont work

Answer
Hello,

You have many things that can be wrong and the first question I have is why did you replace the blower motor?

The blower motor has nothing to do with temperature settings.

Did you check all the fuses? are the numbers working on the heater control? If so, did you put to 90 and put in the defrost mode? Are you getting warm air?

Before changing blower motor, you should have taken a cheap test light to the power wire to the blower motor and checked for power. If you had no power, then you would not have had to waste the money on a blower motor.

If you have numbers on the heater control and you have heat (obviously with no blower), these cars were notorious for bad fan control resistor modules located on the passenger side in the engine area above the blower motor. When I say notorious, I mean it. It wasn't a matter of if they would fail, it was just when, multiple times. If this is the problem, part is about $250, but chances of you finding one is 0-nill.

If the blower motor fuse is good and you still have no fan, the heater control working, you will need to bypass resistor module with toggle. The problem doing this is that you only have high blower or nothing. No different speeds.

Depending on the internal failure in the module caused different problems. Sometimes the blower would not shut off, discharging the battery. Sometimes the blower motor would stop with car hitting bump and sometimes like your situation, no blower.

The module is unserviceable and as I said, unavailable. You could try replacing with junk yard unit and have more problems that you do now.

Cadillac is a good car, but there were some parts they made and never modified the design on, even though it was a constant problem and it could be, they just loved to take advantage of the owners.

Look at your 4.1 engine, many came from the factory with a rist pin knock. I had very few problems with that engine, but they gained such a bad reputation, it actually affected Cadillac sales.

Since 1982, the aluminum engine was used. What people never understood because Cadillac never gave warnings, if you run any aluminum engine hot, you are lucky if you only blow head gaskets. Commonly the engine overheated or close to the red line on the gauge, its junk and will cost $5,000 to replace with new engine. All those in the junkyard are junk from being over heated.

Cadillac made billions with their faulty engineered components.

Any way, back to your problem, answer my questions and check the fuses.

If you need instructions on how to wire the toggle, I will send them to you.

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