Replaced the Blower Motor Resistor ...no FAN at any swtich setting
Removed FAN and connected both terminals direct to truck battery and
Tested for voltage at the blower terminals and had 13.5 volts (fan
does not spin when plugged back)
So I have 13.5 volts now at the blower motor leads but FAN not
turning. Fuse of course checks good (25A position #12). Is my only
option left to be the dash dial swtich ?
om> wrote in message
I pulled the + and - leads (blue and black respectively) off the
blower itself and put a FLUKE digital meter
on the leads as I turned the blower switch. I assume the black lead
(smaller tabbed wire) is a direct to ground wire ? If I measure from
that black lead to a ground / chassis point I should read 0 ohms ?
Sometimes, expecially with a digital meter, it will read full voltage until
it is put under load (drawing normal current), and the voltage will drop
quite a bit. I would meter the hot lead while it is connected to the
blower, run a seperate lead to ground from the negative side of the blower
motor wiring. When I do "jumpering" like this, I use an inline fuse just in
bare a spot on the motor and run a temporary ground to the batt. neg.
to see. Jerry
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