Brake Light Wiring

MERCURY MARQUIS
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CCSANDY
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I have a 97 Mercury Grand Marquis and am trying to put a brakelight/backup light flashing unit (for EMS service). Which wire is the brakelight wire as there are 3 wires that connect to the assembly.

thanks
Mar 11, 2007 at 9:48 PM
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MIKE H R
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one wire would go to the brake ligts, the second would go to the back up lights and the third would go to the power source.
Mar 12, 2007 at 9:57 PM
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CCSANDY
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[quote:7a48b8f615="M_J_RITZEL"]one wire would go to the brake ligts, the second would go to the back up lights and the third would go to the power source.[/quote:7a48b8f615]

Actually the back up light wiring is completely separate. The tail light/ turn signal/ brake light assembly has 3 wires plus the ground that go into the assembly.

I guess i'll just have to turn them each on individually and test the wire for current.
Mar 12, 2007 at 10:32 PM
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MIKE H R
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What kind of flasher is it? i looked in the garage and found one that has 6 wires{ of course none of them are labeled, let me know what kind you have
Mar 13, 2007 at 8:56 AM
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MERLIN2021
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Are you talking about installing Wig Wag lights like the cops?
If so ya need more than a flashser! You need a solinoid set....
Mar 13, 2007 at 4:00 PM
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