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post #1 of (permalink) Old 11-10-2007, 08:20 AM Thread Starter
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Brake Proportioning Valve question

Hey guys... started my brake project on the '81 CJ7 today. First thing was to replace the proportioning valve and I've noticed the switch on top is a single prong connection (new) vs. a dual prong connection (existing).

Other then the switch connection on the top of the valve - the new and existing proportioning valve looks the same.

Any ideas? Did I order the wrong part? Or is one of the prongs ground and I just need to get a new connector to mate up with the valve.


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post #2 of (permalink) Old 11-10-2007, 11:09 AM
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Im not %100 on this but i think the other wire is a ground. Before they got the GND from it all being bolted to the body and frame. The switch when tripped would GND turning the dash brake light on telling you something was up.

88 YJ SOA2.5" 2"BDY Locked F/R Chevy 4.3 NVG241OR 4.56's 36x12.50

Last edited by mach2_nh; 11-10-2007 at 11:12 AM.
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post #3 of (permalink) Old 11-11-2007, 07:05 AM
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According to the '78 FSM you need both of those wires. One comes from the ignition switch and the other eventually feeds back to the bulb.

Will the switches interchange?

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