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By jamestank - 8 Years Ago
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Just got the Crown Vic and the brake lights don't work at times. The t/s work ok. Does the brake light circut go thru the t/s switch? If so, do you
think it's just the t/s switch itself? Thanks for the help. New to the sight. Was a GM tech for 50 yrs.but the Crown Vic is my favorite. Thanks, Jim
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By Meandean - 8 Years Ago
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Not sure if 56 is the same as 55. I had issues with intermittent brake lights, but my problem was more often that the brake lights stayed on at all times after application of the brakes. Sometimes it was fine and they turned off but other times they stayed on. Even when parked and everything off they were glowing. I would unplug one of the leads to the sender on the master cylinder and then plug it in the next time out and it was fine for a while, but then would do it again. I replaced the sender (took about 60 seconds) and everything is fine now.
Like I said, don't know if that's it or not. Just sharing my experience.
Turn signals were unaffected by brake light operation.
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By dbird - 8 Years Ago
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Assuming the wiring is similar to the Thunderbird, I believe the brake lights do go through the turn signal switch. I had a similar problem on my 55 'Bird where the right brake light would not work at times, so I would check the bulb by switching on the right turn signal and it would work and the brake light would work again. I'd get a wiring diagram and follow the wires looking for problems as the switch is neither cheap, about $90 for the Thunderbird, nor is it particularly easy to change, though probably easier on a Vic than a 'Bird.
Good luck,
Don
1955 Thunderbird, 1956 F100 in progress.
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By FORD DEARBORN - 8 Years Ago
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Greetings to all: If my memory is working, one of the 2 wires on the stop light switch should be hot at all times. I think that power originates from a fuse in the head light switch. When the stop light switch closes, a voltage is fed to the turn signal switch as dbird stated, where it is routed to both stop lights. When the t/s switch is activated, say for a left turn, the left stop light is removed from the stop light switch circuit and at the same time, connected to the flasher. The right stop lamp, in this example, will remain connected to the stop light switch circuit. Make sure one of the 2 wires on the stop light switch is indeed hot. I believe Ford followed this scheme through the 50's and much of the 60's. Hope this helps, JEFF.......
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By paul2748 - 8 Years Ago
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The stop lights indeed go through the turn signal switch. Check the wires at the connector for the steering column wires to make sure they are connected and are not corroded or broken
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