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JK McDonald JK McDonald is offline
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Join Date: Oct 2003
Location: Texas
Posts: 1,067
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Lamp Control Unit -

Hey Juan, There is a Lamp Control Unit that monitors the tail and brake lights that you should check. I think on your car it is behind the dash (perhaps someone can provide a more exact location). Using a wiring diagram you can jumper past the LCU to test and verify that the external brake light circuits from the brake pedal switch to the rear brake bulbs are good.

Don't neglect to make sure you installed the correct brake light bulbs ......

Good Luck, Michael
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1984 928S - "Miss Purdy"
1987 911SC - "Frau Helga"
1986 930 - "Well Hung"
1975 911 Targa "Blue"

Last edited by JK McDonald; 10-07-2013 at 08:22 AM..
Old 10-07-2013, 08:06 AM
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