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Old 01-26-2020, 02:18 PM   #7
Will N
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Join Date: Jul 2010
Location: Pennsylvania
Posts: 901
Default Re: Brake Light Switch Backwards

I believe the 28-29 and 30-31 brake light switches work differently. I think the 28-29 is normally off and the 30-31 is normally on. In other words, the 28-29 switch doesn't complete the circuit until the plunger is pulled out by the link from the brake pedal. The 30-31 switch plunger is depressed by the brake rod to open the circuit (when the brake pedal is in it's at rest position) to turn off the brake lights, and when you step on the pedal the spring loaded plunger in the switch pops out and completes the circuit.
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