1988 GMC 7000 Series Blower motor and Clearance lights

[ddpode]

2 Problems. Installed new blower motor. Fan won't shut off. When I
slide the knob to off the motor stays running. Traced the purple
"hot" wire from the blower motor into the fire wall. Cant find a
relay for the motor.
Any idea if there is a relay or what could be causing it to stay
running?

Clearance lights won't come on when the lights are turned on. Does
the wiring connect directly to the switch? Perhaps I have a grounding
issue that is causing both issues. This is a medium duty truck. The
cab is ver similar to an 86-87 model pick up.

-Dan

[GeekBoy]

<ddpode@**********> wrote in message
news:4f9ebbd5-9ce2-4ae9-baca-262b50002c3a@c65g2000hsa.************.com...
>2 Problems. Installed new blower motor. Fan won't shut off. When I
> slide the knob to off the motor stays running. Traced the purple
> "hot" wire from the blower motor into the fire wall. Cant find a
> relay for the motor.
> Any idea if there is a relay or what could be causing it to stay
> running?

A short to ground in the wiring could be doing that. No relay, but probaby a
fuse.

>
> Clearance lights won't come on when the lights are turned on. Does
> the wiring connect directly to the switch?

Yes, and through a fuse.


>Perhaps I have a grounding
> issue that is causing both issues. This is a medium duty truck. The
> cab is ver similar to an 86-87 model pick up.

A ground would not cause lights to not light up, unless the bulbs are burnt
out. More likely an open circuit someone along the way to those lights.

>


> -Dan