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Originally Posted by Fuzzplug Jones
Hey there. I've got a 97 LeSabre with about 160k miles on it. A few weeks back, the AC/Vent fan started working intermittently, and now almost never turns on. I have the climate control system and it's showing that it's changing the fan speed based on temperature and the settings, but if the fan doesn't want to turn on it doesn't.
I asked at my local Autozone for a Haynes manual for it and the one they gave me was for all Buick/Pontiac/Olds C and H body types from 1992-2001. It says to remove and test the relays, but doesn't tell me *how*, which makes the thing kind of useless.
I got under the hood tonight and pulled off the firewall cover and checked some of the maxi fuses, but I couldn't get the relays out no matter what I tried. It seems that they have an angled tab that gets caught over a piece of plastic and locks it into place, but it seems to be oriented in the wrong direction (i.e. if I was able to unlock it at all it would go *toward* the firewall). There's also a green piece of plastic in that area that seems to be freely movable toward the firewall, but it seems to just want to fall out if you push it any further.
I'm not a car guy but if I can get the relays out I can test them and save myself some money at the mechanic. Can anyone tell me how to remove the relays?
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The relays have a tab that catches on the spring part when they are pushed it. I used a steak knife to lift or push down, I forget. I had to ask the service manager at my dealer how to get them out.
If your car has the automatic temperature control with the digital readout showing fan speed, you have the blower control module that's controlling the fan speed. I don't believe there's any relay in that circuit.
if you have the manual AC with the 4 blower speed switch, you may have a relay on the lower speed circuit that feeds the resistor pack and a relay for sure on the high speed circuit. If you have the manual system and your blower works fine on high speed then you resistors are most likely the problem.
The resistors and the blower control module for the auto system are both on top of the housing where the blower motor is under the hood. They are in the air stream so they are cooled by the moving air. You can locate them by following the power lead from the blower motor up a few inches and onto the top of the housing. The relay center that's above that comes loose with one or two screws and then can be pushed up for more roomto remove either resistor pack or the blower control module.
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