start by putting power to the motor to make sure that it really isn't the
motor.
I have had this problem due to intermittant connections due to oxidized
copper in the central electronics - wiggle everything there with blower
selected on - it may start running
to check relay, use an ohmeter and clip leads - to check ballast resistors,
use ohmmeter.
If motor runs when powered, then just trace the circuit backwards - the
schematic is in the service manual
<sjpatejak.RemoveThis@yahoo.com> wrote in message
news:1194931956.286549.229440@v2g2000hsf.googlegroups.com...
> The ventilation blower on my '86 944T suddenly stopped working. I'm
> assuming that this isn't the motor itself, because it gave no previous
> problems. It isn't the fuse. That leaves the relay and the ballast
> resistor. How do I check these to see if they are bad? Thanks in
> advance.
>
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