I made my own system using four relays and a flasher unit. The switch is a small toggle mounted just under the dash and the indicator lights are 12v green LED's. It works great, only thing you have to manual cancel which is,t a big deal once you get used to doing it.
I have a schematic showing how it works, only its 2.5 meg and everytime I reduce the size you can't read it. I guess I will have to redo it small to start with if you would like to see it.
Its pretty simple if you understand how a relay works.
The front turn lights are wired through the Normally Open contacts, and when you turn on the switch, it pulls the relay closed and the lights get power from the flasher unit.
The rear turn lights are also on the Normally Open contacts and work just like the front lights.
The brake likes are wired through the rear relays only and are on the Normally closed contacts. They work straight through the relays, as if they are not in place. When the turn switch is activated left or right, it closes the relay shutting off power from the brake switch and turning on power from the flasher unit.
Since left and right are separated, one brake light is always on when turning.
I used 20 amp five prong relays. Joe
