Fan Blower Switch

BubbaMope · Feb 20, 2015

I have a 1970 Belvedere 318 Factory A/C car. The blower switch works in all positions but high. I'm not sure how to troubleshoot if it is the switch or the blower motor but logic tells me it is the switch. Can the switch be fixed or does it have to be replaced?

69a100 · Feb 20, 2015

On the heater box there is a resistor that controls fan speeds, looks something like this. Swapping this part should fix it. Good Luck http://www.americanpartsdepot.com/images/N322 4862.JPG

440beep · Feb 22, 2015

I've been searching and searching the Mopar vendors, can you buy this fan speed resistor new somewhere?

69a100 said:
On the heater box there is a resistor that controls fan speeds, looks something like this. Swapping this part should fix it. Good Luck http://www.americanpartsdepot.com/images/N322 4862.JPG

AND has anyone used this specific AMC resistor part in their Mopar? I want to order it, but since its like $75 and non-returnable, I want to make sure this will work for a Mopar.

440beep · Feb 23, 2015

anybody use this AMC resistor?

The Horvaths · Feb 24, 2015

You can test to see if all three of your resistors are good, they should measure 0.2, 0.4 and 0.8 Ohms (plus any meter lead resistance). They look like coils of wire. The unit probably has a switch on the right near the vacuum cans. It is a bypass switch. This switch shorts out the 0.2 Ohm resistor when one of the linkages is in the right position.

BTW: MyMopar reference section has a description in 1969 AC Controls section. The PDF page 12 zeroes in on the blower controls and resistor.
See: http://www.mymopar.com/index.php?pid=446

By the way: The 1967 service manual, and perhaps some others, appears to be drawn badly wrong in the specific area of the blower switch and resistor.

BubbaMope · Mar 20, 2015

Thank you all for responding. I have a place to start now!

Fan Blower Switch

BubbaMope

Well-Known Member

69a100

Well-Known Member

440beep

FBBO Gold Member

440beep

FBBO Gold Member

The Horvaths

Well-Known Member

BubbaMope

Well-Known Member

Similar threads