1968 Sedan AC Blower Motor Question

Bill –
I have a question for you experts.
Should the AC blower ever run when the ignition is turned off?
Currently, when the window safety switch is in the bypass position the blower does not turn off unless you turn the AC to off. When the switch is in the locked position the blower turns off with the ignition.
I have replaced the relay but it did not resolve this issue.
Thank you,
Greg
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Hi Greg –
The switch that you are referring to has two functions. When the lockout side is selected the RF, RR, and the LR windows become inoperative from their individual switches. The switch will lock in this lockout position until returned back to the center or neutral position. When the By-pass side of the switch is selected all of the windows will operate with the ignition switch in the off position. The blower will operate as well if the a/c or heat control is in the on position. The important feature for you to know is that this by-pass switch will automatically return to the off or neutral position when it is released. It will NOT lock in the on position. The by-pass feature allows you to momentarily operate and lower the windows before entering the vehicle on a hot day etc.
If your by-pass switch is in fact locking in the on position, the switch is possibly installed incorrectly or somehow the wiring near the switch has been installed wrong during some sort of repair. Some faults did arrive at the Dealer from the factory however and therefore it is possible that this Lincoln was delivered to the original purchaser and never repaired. The power window operation is explained in the owner’s manual as well as the shop manual.
Sincerely,
Bill
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Thank you Bill.
My switch locks in the bypass position. So if I am correctly interpreting the info below, it sounds like my switch is either defective or installed backwards if that is possible?
Thank you,
Greg
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Greg –
I can’t tell from here of course exactly what has been miss installed. Reading and understanding your very clear blog question and information did cause me however to believe that your switch was inappropriately locking. If this has been happening for a long time, the switch or the plug wiring could have been faulty since 1968. If it only began to do this recently someone could have created the issue during a repair of sorts. In any case I myself have never encountered this or repaired this exact issue before. If you need our services to correct this fault or supply any parts, we are certainly capable.
Sincerely,
Bill
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Thank you Bill.
I will be taking out the switch and send it to you for diagnosis. I also have a left rear switch that needs rebuilt. I will also check the wiring to see if is correctly install according to the schematics.
Best regards,
Greg