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Old 10-12-2012, 09:35 AM   #7
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Originally Posted by rheath011 View Post
...Blower motor does not work power on ground and positve cables
Ac swithch light will not come on
When I ground out the blower motor blower works ac kicks in and led on switch comes on everyhing seems to work properly
Just going through the system replaceing parts... I just don't know any other way to troubleshoot this issue...
Hi rheath011,

As you continue your parts hunt, you may have better luck contacting the parts department of your local Ford dealership or ordering parts yourself through It's always wise to use Ford-approved parts when repairing your vehicle.

Originally Posted by a_2000_se View Post
If it's what I'm thinking you may be talking about - see if they put that on the resistor pack under the dash and behind the glove box. I seem to recall someone else having an issue with blower motor/switch/AC and it was an interesting fix. Maybe it will come to us.....
Originally Posted by iminhell View Post

C972 is where the connector for the diode is located.
But the diode is physically located in the BJB.

A most likely scenario is that the Heater Control Module is damaged. That is the black plastic part behind the controls on the dash.
If jumping power makes the blower motor spin, you just bypassed that switch. Being it and the blower motor resistor are both in line, both have to be suspect. If it's not the blower resistor it must be the control module.
Originally Posted by iminhell View Post
Quit shopping at a parts store.
Go to Ford and get the correct parts.
Good info, everyone. Group effort for the win!

Have a great weekend!

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