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Scott K
Scott K, ASE Master Tech/Instructor
Category: Car
Satisfied Customers: 1569
Experience:  20 yrs exp. Electrical; Driveabilty; Undercar; Airconditioning. Domestic and Foreign.
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2002 excursion: hooking up extra guages..dim with the dash ligh dimmer

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I am hooking up extra guages on my 2002 Excusion, where will I find a wire to hook up the backlight so they will dim with the dash ligh dimmer?


Welcome to Just Answer,

The wire leaving the Panel Dimmer to control Instrumentation Illumination is LB/RD which is a Light Brown wire with a Red Tracer (Stripe).

This wire can be found leading to all of the components that require dimming, Instrument cluster, Radio, control switches on the dash and doors.

Hope this is the information you were looking for If not please reply back


Scott K and 6 other Car Specialists are ready to help you
Customer: replied 9 years ago.
Do I splice into the LB/RD wire and run the two new gauge lighs directly off it?
Yes this is the only way to illuminate those lamps and dim them, but doing so will add amperage to the circuit above what the factory intended to, the lower the wattage of the lamps you are installing the better.
Customer: replied 9 years ago.
Is there a wire I can tie into that will light the gauges when the lights are turned on but they will not dim, that would be better to use?

You could tie into to the park lamp circuit but this would also add amperage to that circuit, you should be ok with the LB/RD wire, the factory does add a little extra amperage rating in the fuse selection.

I just had to add a little "disclaimer" there, any time you add aftermarket accessories.

I've seen this done many times with no problems.


Customer: replied 9 years ago.
I pulled the connector off the back of the dimmer switch (rotaty) and found a brown, black, blue with purple and orange with green strip, not light brown (tan) with red strip.

Arrg, My fault,

sorry LB is light blue,