LED bulbs

moparmat2000 said

Just remember, You cannot use an Led bulb for your parking brake light. Leds are not bi directional. Your parking brake light gets power from one direction for the parking brake, and also from the opposite direction from the low brake pressure switch in the proportioning valve (residual pressure valve) its just the way the cars are wired.

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Matt, this is not true. While LEDs are polarity sensitive, that's not how the brake warning works.

Both the brake pressure differential switch and the parking brake switch have grounding switches which are in parallel. Either one will ground when activated, completing the circuit for the warning lamp

So if an LED is properly oriented to work for one, it will work for the other.