Heater fan wiring issue - help

[matthon]

I had a working heater, but the fiberglass was shot.
I was able to get a complete working heater from a FABO member.
I finally switched them today, and the fan does not work.
So, I checked the wiring diagram: 1 black wire from the fuse box to the fan switch, then a green and brown wire from the switch plug into the heater.
The brown wire also goes from the heater plug to ground behind the right kick panel.
I followed the wiring diagram and the black wire from the fuse box goes to a ground junction on the other side of the fuse.

Can anyone tell me how the fan is powered, and what should I test?
I only have a test light at the moment.

It seems odd that the switch worked before, and the wiring diagram is not making sense to me.

 

[70Duster440]

Pull the blower motor resistor out of the top of the case and have a look. If they burn up, motor no worky.

 

[matthon]

I took it apart and cleaned it when I got it, and it looked fine then, but I can check it again tomorrow.

How can I test the motor?

 

[70Duster440]

Should be able to apply 12v direct to the one motor lead (coming off the resistor). The other lead should be grounded.

 

[matthon]

I just tried that with the motor I removed and it did not work (??)
I'll try it with the motor that is in it tomorrow.
I'm still confused on how it gets power though.

 

[70Duster440]

If you applied a good 12v source to the old motor and it didn't turn then it sounds like it's dead.