Cadillac Repair: AC Blower Motor Relay, cadillac man, head gaskets

Question
I want to know where the airconditioning blower motor relay is located.

Answer
Hello,

You did not specify year or model, but that's ok.

Here is the bad news--these vehicles don't have the standard hi and low blower relays.

Cadillac has had issues with the blowers since the early 80's. Did they ever fix a known problem? Never did!

These cars were notorious for one of two blower problems-either blower would not shut off and battery went dead, or blower did not work.

The wonderful Cadillac engineers designed a relay module with a circuit board to control speeds. Module was notorious for failing electronically located on passenger side of cowl area under hood.

The only way to repair was to hard wire with resistors around this module to control blower speed and be able to control on or off. The other option was to pay $400-$500 to have the module replaced just to have it fail in the future.

I am a Cadillac man, however they do have many of the same problems over the years. You had a 50/50 chance of getting a good engine when purchased new. I have dealt with the factory knocks in the 4.1, the 4.5, the 4.9 and the Northstar. I even was involved in the 81' 4-6-8 368 CI engine which was great when the computer was disconnected where it ran on 8 cyl all the time.

The North star when introduced was raved about, but after it had been around a while, it was notorious for burning oil and dare not over heat or the aluminum block or head gaskets were shot.

I realize I wandered away from your question about the relay, but I am just saying these vehicles had inherent problems. The blower being one and the engines the other.

Where these relay modules for the blower motor were mounted were above the heater core. the easiest way to find is follow the blower power wire up.

Rob