'59 Plymouth Forum

I have installed the AAJ Disc Brake kit on my car ,which works great ,However
I need to install a Non Hyd Pressure type switch on the Brake pedal.
Has anybody made this installation before .I would like not try and invent one.
Any ideas?
Mark Evans

I took an later 60's and 70's Mopar brake switch (non-hydraulic) and kinda created my own type of switch that has the brake switch plunger on the back end of the brake rod. I copied a couple other peoples method of bringing a modern plunger type switch.
I will dig up a picture of mine. Did not take too long to fab up.

John Q.

Mark - I replaced a AAJ supplied master cylinder with Hyd switch with a NAPA master cylinderthat I drilled and tapped for 1/8" pipe thread. Works great, I tried installing a non-hyd. switch in my Desoto but gave up, it was a freaking nightmare. You will need the patience and past experience of a John Q. to get it right. See pitchuhs.
Dick.

"Obi Wan" Koch flatters me! (I like it!!!) but I took a conventional 60-70's mopar switch similar to this one. (mine had a angle in it, but I straightened it out like this one on Ebay. http://cgi.ebay.com/ebaymotors/70-71-72 ... 53e6db847e

I then place in in the middle of the brake pedal assembly so the switch would make contact with the end of the brake rod. I did not drill any holes at all. I used small nut and bolt assembly to anchor the brake light swich assembly and then used another nut/bolt assembly right behind the switch to give it an positive pressure of the switch end so it would not deflect out of alignment.

Again no holes drilled and real simple to do. I will go out an take a picture as best I can of how mine looks installed so you can see what I did.

John Q.

Thanks ,
My brake install is a very tight fit on the Firewall and is complete.Too late to drill now.
I am going with the Pedal kit ,Just bought the part on ebay,
John ,The photo of your install will be helpful, Thanks!

How can we Post a Heads up to other people about Modifying the AAJ kit before they install?
Mark

Mark - When I ordered the kit I specified the tap and drill for the switch.
Dick.

mark, though it took a while to remember to take these pictures, here is my 60-70's mopar brake switch installed on my convert. I use all existing holes for mounting the bracket. The bold behind the metal braket is to keep pressure of the assembly on to the knob of the MC push rod as it pivots. That area was pefect for it since it was slotted anyhow.

The braket I took had a 45 degree bend to it and I hammered it straight and the fromed a 90 degree bend down to the pivot head of the push rod.

Hope this helps even though it is overdue to you.

John Q.

Thanks John,
These help a great deal.
Ques.
How does the switch activate the lights?
Is it when its released outward or when its first pushed in?
I am not a sparky
Mark

Mark, those type of switchs are activated when the switch is allowed to move out of the depressed position. As you brake, the swich is then allowed to be un-depressed and the brakes circuit is closes the electrical circuit and turns on the rear brake lights. Take your foot off of the brake and the plunger is depressed again by the knob of the push rod, opening up the circuit which tuns off the current.

In sparky terms it is Normally closed switch, but by adjusting it to have the plunger pressend in (with no brakes applied) the switch is then opened.


John Q.