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July 28, 2020

1964 Turn Signal Issues - New Owner

Hi Bill,

I purchased my Lincoln a few weeks ago and had it shipped to me. All of the electronics work bar the blinkers. The owner had the neutral switch replaced just before selling and said they were working then (of course). The mechanic thought maybe a wire had come lose. What I know and have tried so far: 1.The brake lights work and the appropriate light shuts off when the turn signal switch is engaged, it just doesn't flash. 2. I replaced the turn signal flasher and still no blinkers. 3. I checked the wires coming from the bottom of the steering column that lead to the horn and turn signal switch with a light tester and all seem to have power. The wires going to the turn signal flasher also have power. Does this sound like a malfunction of the turn signal switch itself or should I check another failure point? Thanks for all that you do for us Lincoln owners!



Hi Devin -

Congrats on your 64 Lincoln sedan purchase. They are well thought of and respected in the old car hobby.

Your turn signal issue does sound like a t/s switch problem. To test this circuit properly though you will need in addition to the 12v test light a correct t/s wiring diagram for a 64 Lincoln. This way the circuit and sw. can be verified one step at a time as per the wiring contacts inside the t/s switch and the plug to that switch etc. With the steering wheel removed as per the shop manual a sharp eye can (possibly) in many case spot bad connections and possible melting of the plastics at the switch contacts. Keep in mind that an incorrect or faulty flasher could also upset the system. You could as a quick test only, unplug the t/s flasher and jump the plug off and on for a short time manually with a jumper wire and the ignition key turned on while operating the t/s sw. for a left- and right-hand turn. This test makes you control the circuit flashing and become the flasher for this test. A helper can assist you by watching the outside lights for any or correct operation.

Let us know what you find. We have the correct parts and shop manuals etc. in order to help you test and repair this issue.



July 13, 2020

1976 Mark IV Blower Resistor Question

Hi Bill -

I'm having problems with my blower not working on Low speed but works OK on High speed. After reading some of the posts on your blog, I think I need to check the resistor module and associated plug. I've already checked the high blower relay on the firewall and found that it's working properly. My question is: Where is the resistor module located on my 1976 Mark IV ? Some of my friends have told me it's under the hood on the right side close to the fire wall. I haven't been able to locate it. My master parts catalog shows it to be under the dash but doesn't show exactly where it is.

Can you help me with this?



Greetings Curt -

The blower resistor and its connector area are excellent places to examine first with the low blower speed issue that you are experiencing at this time.

The resistor on your 76 Mark IV should be located up under the dash on the rt. side ( passenger side ) and mounted into the plenum assembly. It will be located between the transmission hump and the blower motor assembly. Removing the glove box liner should give you visual access and enough space to remove the resistor by releasing the necessary clips. If you require any replacement parts, we can supply them to you ASAP. Good luck to you with the inspection and the repair.