"bob urz" <sound@[EMAIL PROTECTED]
> wrote in message
news:1214891191_10993@[EMAIL PROTECTED]
>
> Well bro in law managed to pry it out. the core was caked with garbage
so
> much that air flow through it was nil. He did crack a chunk of the
plenum
> while he was at it.
>
Brother-in-law or not Bob, I'd make him buy me a new truck for breaking
that
piece.
> I think i got the high speed issue solved too. On some Gm trucks, the
High
> speed blower setting goes through a separate relay above the plenum
> and blower motor. A different relay was no help. First, i determined
> that the relay was not engaging with the speed selector switch on high.
> The switch was ok, i had 12 volts there on high position, there was a
> small connector with 4 or six smaller wires that this circuit goes
through
> that had a problem. I took the connector apart and work it and
> the relay clicks now. Its clicks, but still no blower. further testing
> with the fluke showed no power to the relay switched terminal.
> I did not have a shop manual, but a little sleuthing showed this feed
> went through a 3 pin connector at the bottom of the plenum and then
> through the firewall. Close inspection showed it melted some. I could
not
> get it apart, but after working it i had the hot 12 volts back to the
> relay. a new connector or bypass with a butt splice should fix it.
> Seems a lot of people have this problem, but i had not seen this fix
> mentioned.....
>
Good sleuthing Bob. The AC relay is generally one of the first places to
look for the no high speed problem, but I had not heard about any
connector/wiring problems. That kind of tracing can get nasty and it's
good
to see info like this to keep for future reference.
--
-Mike-
mmarlowREMOVE@[EMAIL PROTECTED]
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