Hi
My 1988 150 has no power going to the haeter blower.
The fuse is fine but there isn't any voltage going to the fan control switch.
I have checked everything? Is there a fusable link? There doesn't seem to be any continuity between the fuse link and the blower switch. All the wiring diagrams just show the fuse connected to one terminal on the switch but I can't find any power going to it.
The heater in this truck never did work very well but now it is even worse.
Thanks
Ernie

 

The power does not go to the switch, it goes to the blower motor.
Here is a diagram.
http://i54.photobucket.com/albums/g9...20AC/PG116.jpg

 

Thanks I probably need a new Blower resistor but I can't find where to buy one.
Any suggestions??
Ernie

 

If the blower doesn't run on high speed, it's probably not the resistor. Voltage is applied directly to motor from switch on hi speed.