The heater fan switch is acting up. Sometimes comes on as it should; sometimes takes up to 15 minutes or more of engine operating before it works; sometimes comes on and off intermitently. Sometimes it will function after I release the parking brake. Occassionaly it will run on after I turn off the ignition. All this seems to happen when it's cold outside - say 5 degrees above freezing or colder. My research tells me that it's probably the heater fan control relay - the one that's mounted up behind the body control module above the driver's left foot.
I've gone to the boneyard to see how difficult it is to replace. None of the vans there have the relay as described in the info that I've downloaded from the web. All I can find is something that looks like a small bell transformer connected by two wires. Is this what I'm looking for? The web description talks about a black relay box with four wires - albeit in the same location as the 'transformer' on my vehicle.
I've gone to the boneyard to see how difficult it is to replace. None of the vans there have the relay as described in the info that I've downloaded from the web. All I can find is something that looks like a small bell transformer connected by two wires. Is this what I'm looking for? The web description talks about a black relay box with four wires - albeit in the same location as the 'transformer' on my vehicle.