Quote:
Originally posted by PeterT
Steve:
Regarding Jay3000's observation of both wires being hot at the blower motor, does this suggest the blower motor regulator is the problem (no ground)? Does the normal (one hot and one ground wire) apply when the blower motor is OK but turned off, or only when it is on and functioning correctly?
Also is there an easy way to trouble shoot the regulator short of replacing it?
I have an 85 300SD and had the blower motor replaced with a used one (I gambled and may have lost). It worked great for three months, then started working erratically and then low speed only, and now not at all.
I was hoping it was the fuse, but despite various suggestions as to where to look, I haven't found the "outboard" fuse. Does this model have one? I noticed it is listed on the fuse box list.
Thanks for any and all replies.
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Originally the fuse was in the box, but they melted many a box so even ones origionally in the box have been moved to the fender. wE have done a bunch of them.
The 85 doesn't have the blower regulator like the 86 on car does. It has a separate controller and a resistor pack.
In the first testing done to Jay's car his first description caught me off guard and thus I didn't suggest the fuse. What was happening was that he evidently didn't have a load set on the system and the fuses get a hairline crack. The fact that he had power on both sides should place the blame on the regulator as it is a variable connection to ground naturally. What in fact must of happened was under no load the fuss passed voltage as load was applied it became a circuit breaker.