RW> Just where do they mount that blower motor relay. I find that the blower
RW> motor relay in my Silverado is a little discolored but no melting to
RW> speak of. The control switch is on the dash, but the actual relay and
RW> motor speed resistor pak is under the dash next to the blower motor. It's
RW> in a little vented box (next to the cabin filter housing) which I think
RW> helps to keep it cool. Mine is 11 years old and no issues yet.

It is mounted in a similar location on the Durango.  Not far from the blower
motor, up inside the vent area.  Just a few bolts hold it up there.  On the
passenger side about a foot away from the blower motor.  Remove two bolts and
it comes down.  

My first connector was melted so bad, I couldn't remove it.  I had to cut the
wires and re-do everything with wire-nuts.

The problem with the Durango is the wire harness melts/shorts and fries the
blower motor relay.  When that happens, just the high setting doesn't work.
Everything else does work.  Happened to me three times, until I replaced the
wire harness and blower motor itself.

There is a case where the blower motor can draw too much power and fry them
over and over again.

RW> Check the amperage load on that motor in each speed range. Too much of a
RW> load will create a lot of heat that the relay and resister pak has to
RW> handle.

Yes, that is what causes many of the failures.  The best bet when someone with
a Durango has a problem like this, is replace everything.  Wire harness,
blower motor resister, and blower motor.  

- Mark

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