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Need to know where the pink and purple colored dual vacuum plug goes under the dash of a 1991 deville-one of the lines are connected to a port by the parking brake assembly

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Hello: There is a switch on top of the steering column under the dash that this connects to. The purpose of the switch is when you have the park brake set and you shift into reverse or drive it will release the park brake. If this feature doesn't work after you connect the line then the vacuum actuator on the park brake assembly may be bad. There is a small lever on the park brake assembly that when you pull back on it, it will release the park brake. You need at least 10" of vacuum to work the system.




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Posted on Oct 12, 2010

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