It is very common for the ground wire from the fan to get intermittent or die completely at the end far from the motor. The grounded end of it is inside the van, behind the main fuse/relay panel. It is a big brown wire that plugs in with a bunch of other brown wires. The are subject to corrosion and overheating of the wire end and then the ground is lost. The fan won't run without it's ground wire working. He could do a quick test by running a jumper wire from bare metal of the van to the fan motor where the brown wire attaches. Mark
Dave Mcneely wrote: > In the continuing saga of my '91 camper cooling matters: > > I reported earlier that I was getting a new radiator, and that I hoped > this would resolve the cooling............ > But, the tech then called me, and said he could not get the fan to come > on. The fan was working, both low and high speeds, when I took it to > him. He now claims that he doesn't know if it was working, but that > there is power to the fan motor, and the fan won't come on. he claims > that there is no point in doing any further checks, that there > definitely is power, and that the fan definitely does not work. > > I am at a loss as to why a perfectly operable fan would just stop with > no warning when disconnected and reconnected. I tried to get him to run > through jumping the temp switch. He just thinks I'm nuts. > > The fan has factory air conditioning, and he says the fan won't operate > with the air conditioning on (should be full time then), nor will it > operate when the van is warmed to the led position on the gage, though > he can show power to the fan motor. He says the only thing to do is > replace the fan motor or fan assembly. > > What to do? I think he has it connected improperly some way, but I > can't seem to get him to consider that possibility. Or, the leads and > contacts may just be old and need cleaning -- sometimes when contacts > are disconnected, they are put back together with dirty sides touching > and therefore not making good contact. Can't get him even to consider > that. > > There are only two wires to the motor as he has it wired, and I believe > there should be four (one for each of the two speeds, one separate from > the air conditioner, and ground). Is this incorrect? > > David McNeely > |
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