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No, we installed switch and disconnected vacuum, so at least the back up lights work when in reverse

You can see my ps bracket rebuild and rubber snub placement at: The Imperial Power Steering Bracket

Looking for a working used or NOS vacuum brake release/back up light switch for a 1967 - 1968 Imperial. Part #2857486. See pics below.

I think the vacuum is maybe causing the contact bridge or contact points of the switch to move around, preventing continuity

It’s set up exactly as the pic you posted indicates. Nobody ever messed with it. Would be difficult for you to duplicate doing a bench

It’s set up exactly as the pic you posted indicates. Nobody ever messed with it. Would be difficult for you to duplicate doing a bench test

I agree that both internal systems should independent of each other. Perhaps the vacuum is moving the metal connector contact that completes the light circuit. It’s an aweful lot of turbulence goin on in that switch?

By the way, everything else on the car works perfectly, (even the atc), except clock and auto brake release Www.1967imperial.com

Wow, completely makes sense. My setup is pic #1 and 2. The plastic piece has long fallen by the wayside The purpose of the plastic insert is to provide a friendly surface/contact point for the moving plastic tab/finger/lever on the switch. As proof of the latter please see my pic below. You will...

Thank you, would be interested in another if you could solve.

Agreed, we put a test light on the switch with and with out vacuum, only when the vacuum hose was disconnected did the test light work, we did the same for back up lights and found same results. There is something about the vacuum within the switch that disrupts the electrical connectivity for...

Thank you both for replies

utilizing a mirror we can see that the sliding pin in the column goes from the fully open position to the closed position in drive. I purchased a rehabbed unit from Dematt, I believe, but the backup lights won’t work when the vacume hose connected. Disconnect vacuum hose and back lights work. So...

Looking for a NOS mopar part # 2857486 vacume parking brake/backup light switch used in the ‘67 and ‘68 Inperials. Switches were known for failure. Hoping maybe someone has a nos or good used switch. See pic below. Thank you, Mike

Do you have the emergency brake release/backup light switch that’s mounted to the steering column at the base of the interior?

I’ll take it, lmk next step

Need a chrome knob that fits on the electric seat control shaft for a ‘67 Imperial. Located at side of seat at the base. Thanks , Mike

We found after replacing the green and yellow valves, the push button control and reconnecting the broken vaccuum tabs that broke off in the “brain” (accessible through the front passenger kick plate), things came to life. That was on a ‘67 imperial Gen I ATC. See blog at...

Update on the 1967 Imperial. We took the car to Hershey AACA in ‘21 and ‘22 and entered it in the HPOF (historic preservation of original features) class. The judges really poured over the car. One of the Judges did not believe the interior was original, it was that well preserved. Anyway, the...

Pretty good shape, the black paint on the center wheel cover of 1 or two is could be better. U can see at Www.1967imperial.com