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stop light switch
#1
Just popping in
Just popping in

hemlock
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Can someone tell me the supplier & part number of the 3 prong VW stop light switch that can be used on 56 torsion level cars. Also, if a 2 prong switch is used, I assume power wire & wire for torsion level go to one contact, & wire for brake light to the second, and a relay is installed in the wire for torsion level- is this correct, & what should I use for relay? Thanks,
Clifford

Posted on: 4/14 17:53
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Re: stop light switch
#2
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HH56
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The VW switch has not been all that successful and several have had to replace it again in a fairly short time. Whether it is due to the switch or other factors is unknown. Here is an Amazon link if you want to try one. You will also need to change the terminals in the Packard loom.

The two prong switch needs a relay to duplicate the function of the 3 terminal switch but is a proven solution. It uses an inexpensive switch available almost anywhere. There is a conversion kit available at some of our vendors if you want something that is an easy install or for a bit less money and a bit of time you can buy a relay and switch and make your own.

Here is the 2 terminal switch conversion schematic if you want to make it. The relay socket can be eliminated if you wanted to make a small loom using ordinary wire and terminals. Using the bullet connectors the extra loom will plug right into the Packard brake switch plug.

Attach file:



jpg  Brake Switch Relay Replacement.jpg (137.43 KB)
209_607786e125c40.jpg 1079X800 px

jpg  brake sw replacement loom.jpg (132.23 KB)
209_607787354299e.jpg 1200X900 px

Posted on: 4/14 18:24
Howard
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Re: stop light switch
#3
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Owen_Dyneto
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If you're not into a DIY project, the simple and easy way is to just buy the inexpensive little P.N.R. kit. Five or 10 minutes to install and you're probably set for a lifetime and if not, a replacement 2-prong hydraulic switch like Echlin/NAPA SL-134 is less than $20.

Attach file:



jpg  55-56 PI brake light kit.jpg (174.09 KB)
177_60778f47d9dcd.jpg 1111X1054 px

Posted on: 4/14 18:56
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Re: stop light switch
#4
Home away from home
Home away from home

R H
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I have used hh56 system..

No problems..

Posted on: 4/14 22:20
Riki
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Re: stop light switch
#5
Just popping in
Just popping in

hemlock
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Sorry for the delay in responding, but other projects took priority. Just bought a 2 prong stop light switch & 5 pin relay & installed them according to the diagram provided. Everything working as it should. Thanks for the help.

Posted on: 4/27 18:15
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Re: stop light switch
#6
Just popping in
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Dave O
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Lessons learned. After running all new lines, rebuild on the power brake booster and totally clean system. I discided to use synthetic DOT 5. Which within a few weeks of use wrecked the brake switch. Which in turn made the rear of the car lower to nothing.

Best Wishes; Dave O

Posted on: 5/4 16:32
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Re: stop light switch
#7
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HH56
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Even some of the modern 2 terminal switches seem to have problems with silicone fluid.

Probably the only sure way to eliminate hydraulic switch problems with silicone fluid is to use a mechanical switch actuated by the pedal arm. A bracket made from heavy sheet metal -- 10 ga or so -- and mounted to the steering column with a hose clamp or the like makes the switch relatively easy to install on 56 power brake cars. A bit more work and different bracket dimensions is needed on the 52-55 power brakes because of the different pedal and placement. A 3 wire loom extension can be made to extend the wiring from the mechanical switch out to the original brake switch location and plug into the old brake switch plug on the factory loom.

Manual brakes would need a switch that goes under the car and is actuated by the under floor linkage. All three have been done on Packards and as far as I know all have worked well with no problem installations.

Attach file:



jpg  Mechanical Brake Switch.jpg (127.27 KB)
209_6091e45dca5d8.jpg 1149X657 px

jpg  mechanical brake sw 2.jpg (160.39 KB)
209_6091e59c586a1.jpg 800X1550 px

Posted on: 5/4 18:25
Howard
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