The parking brake leads has to have power to it (when the parking brake is on, power is applied to the circuit that lights the lamp). In order for the system to think the parking brake is applied, you would need to have power applied to this lead (not grounded).
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The parking brake leads has to have power to it (when the parking brake is on, power is applied to the circuit that lights the lamp). In order for the system to think the parking brake is applied, you would need to have power applied to this lead (not grounded).