Re: 55 clipper three prong stop light switch

Posted by Tim Cole On 2013/5/11 8:35:46

I bought a kit from Dwight Heinmuller. It puts the brake switch on brake pedal like a modern car.

For some reason these hydraulic switches are prone to trouble. It didn't happen in the old days. I think because the brake fluids are different today.

I like the relay addition though. That would make for a lifetime installation.

For those who want to add that, let me help with the above diagram. You need the five prong unit.

Use:

pin 86 for B+
pin 85 for ground from the pedal
pin 30 for B+
pin 87a for load leveler wire (normally closed)
pin 87 for brake lights

What happens is the relay toggles between 87 and 87a when you apply the brake.

It could be that simply wiring in relays to the existing hydraulic switch will help by taking the load out of that circuit.