1969 Barracuda AC operation

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Tylinol

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I've rebuilt the entire AC system on my '69 factory-air Barracuda. Everything so far is testing out fine, but I'm having an issue with the blower fan. The cluster has labels for "Low ^ High", and the wiring diagram implies that the middle position is medium speed, as opposed to off. However, I only have two speeds, with the left two positions of the switch giving the same fan speed. So, I just wanted to a) confirm that the '69 Barracuda factory AC is a three-speed system, and b) ask if anyone knows what a continuity test on the fan switch connector should look like for the black, green, and dark green wires.
 
If you have a 3 speed, I think you should have you have 2 resisters on / by the fan motor. Maybe even in the air box.

Low would be one resister or combination of the 2, med would be another resister or combination of the two and high would be no resister
I could be VERY wrong here but I think that's how it works..

Mymopar.com should have a Factory Service Manual that will detail hay to test
 
Yes sounds like your resistor has a burnt out circuit. I had to replace mine in a 69 cuda air car. It is in the heater box.
 
Can you access the input wire to the motor while it is running?

If so measure voltage in each mode.

Low speed should have lower voltage than in high speed. Med should be some where in betweenany chance you have rewired things and didn't quite get things right?
 
I just did another round of troubleshooting and determined that my blower switch is at fault. Low and Medium positions had not continuity between any of the switch terminals (effectively making it low) and the high position had continuity between all three (effectively making it high). I'd love to rebuild it if anyone has a source for the rivet-style terminals that attach to the insulating block.
 
There are companies who specialize in rebuilding, from previous threads, instrument specialist.

Here is one from a Google search, https://www.precision-pwr.com/
Don't know any thing about them

You could try yourself by drilling out the rivets, (that's the hardest part) a Dremel and slow and caution.

Once they are out you can see what is not right. If need, find another switch that is like yours, might not need to be the same exact one and swap some parts around.
 
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