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Old 05-30-2019, 09:15 PM   #19
Tom Wesenberg
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Join Date: May 2010
Location: Mpls, MN
Posts: 27,440
Default Re: Lighting dims question

Do you use a fuse, and does it blow when you step on the brake pedal?
I'd remove the power wire on the brake switch and see if the problem goes away.
If it does, then connect the power wire and remove the brake light wire and see if you have a problem when you step on the brake. Some repro brake switches short to ground when the brake pedal is pushed.
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