So... We have a beater work car (88 Pontiac 6000, 2.5) that gets few miles
on it and serves it's purpose rather well.
Heater started working only on Medium, no High or Low. Following a
suggestion from a Usenet forum (after needless replacement of switch) I
decided to look at the blower resistor. What I discovered is (this car had
aftermarket air at one point and no longer has the compressor as I had it
removed) that my assumption that the blowers and such would still be
original was wrong (I hadn't even considered it actually).
Needless to say, the resistor is not a GM resistor... it is Wynn's Frostemp
Inc. I have looked around a little and see that company is now 4 Seasons...
but their number gets me no end-user friendly options and they would be
closed for the weekend now, anyhow. I really see little else relating to
Here are a few thoughts:
1.) How do I test one of these things with a VOM? Would the open be visible
to the eye (it's not) or is this a bi-metal type of deal that has some sort
of burnt or ruptured core? It has three separate terminals (orange, white,
yellow) and two coils.
2.) Any ideas on where I could get replacement parts for this thing? I would
think that one of these days the blower is gonna get old and die, too.
3.) I see that the installer just spliced into the wires of the three used
terminals on the connector for the original resistor which is just hanging
out of the way in the engine compartment. What if I were to just pick up an
original and plug it in, unplug the after market and rig some sort of
enclosure for the GM one? Sounds risky to me... but might be worth
considering though I don't know what the differences in resistances or
configurations might be. Replacing the whole deal looks like doing more than
necessary if I can work around it with correct parts or make-do options.
Thanks for any input.