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A/C control

D

David Eldridge

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Ok. Here is a weird one. I'm working on a 1968 Charger with A/C. I'm testing the controls and I think something is wrong. Seems like power is being sent where it shouldn't be. Does anyone know where power should be sent (i.e. to the compressor, and which part of the blower resistor) when each selection (max a/c, a/c, heat, def) is made?
 
A little more detail on what you mean by "power is being sent where it shouldn't be." The compressor is powered through a time delay relay in the Heat and Def mode, then stops after approx 10 min, depending on ambient temperature.
 
Demonic said:
A little more detail on what you mean by "power is being sent where it shouldn't be." The compressor is powered through a time delay relay in the Heat and Def mode, then stops after approx 10 min, depending on ambient temperature.
Click to expand...
Appears the A/C compressor is being powered directly from the control and not through the time delay relay in defrost mode. Also seems like both power wires off of the control (not the fan speed switch) are getting power on all settings but heat. Seems like it would create a short.
 
David Eldridge said:
Appears the A/C compressor is being powered directly from the control and not through the time delay relay in defrost mode. Also seems like both power wires off of the control (not the fan speed switch) are getting power on all settings but heat. Seems like it would create a short.
Click to expand...
Do yo
Demonic said:
A little more detail on what you mean by "power is being sent where it shouldn't be." The compressor is powered through a time delay relay in the Heat and Def mode, then stops after approx 10 min, depending on ambient temperature.
Click to expand...
Any chance you have either a 68 manual so I can give you circuit numbers to follow?
 
Well, I have a '69 book. Matches my Charger, coincidentally. I can tell you this-

The fan is on if any button other than "OFF" is pushed. The fan switch positions are Low, Med, High; in other works, there is no off position on the fan switch itself. This throws a few folks that don't have an owners manual. The control had two power feeds, one for the blower, one for the compressor. Not counting the orange wire, which is of course, the illumination circuit.
 
David Eldridge said:
Appears the A/C compressor is being powered directly from the control and not through the time delay relay in defrost mode. Also seems like both power wires off of the control (not the fan speed switch) are getting power on all settings but heat. Seems like it would create a short.
Click to expand...


Do you have a manual?
 
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