Mechanics

BRAKE LIGHT WIRING

Mercury Marquis

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
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Ccsandy
March 11, 2007.




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.

M_H_RITZEL
Mar 12, 2007.
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.

Tiny
Ccsandy
Mar 12, 2007.
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
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M_H_RITZEL
Mar 13, 2007.
Are you talking about installing Wig Wag lights like the cops?
If so ya need more than a flashser! You need a solinoid set.

Merlin2021
Mar 13, 2007.

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