Re: '56 Patrician Torsion-level brake light switch
Posted by humanpotatohybrid On 2022/9/11 7:33:00
When the disabling circuit (brake switch + dash switch) provides power, the system works. When power is interrupted, such as by turning off the dash switch, or applying the brakes, TL is disabled.
So you end up with, when you apply the brakes, you want the brake lights on, but TL off, and vice versa. That's why it's 3 terminals, Pink is common, Lime is to the TL switch, Green is to brake lights. Curiously, they used the same stop switch on all cars of the TL era, even those with no TL at all (such as 55 Deluxe).
If your brake lights are on constantly, temporarily swap the Lime and Green wires on your stop switch, then test the TL system.
If you want to use a 2 pole switch, you will need to add a relay as such to accommodate the Lime wire to the TL system.
This schematic would also work for cars with positive ground, just reverse the diode orientation.
So you end up with, when you apply the brakes, you want the brake lights on, but TL off, and vice versa. That's why it's 3 terminals, Pink is common, Lime is to the TL switch, Green is to brake lights. Curiously, they used the same stop switch on all cars of the TL era, even those with no TL at all (such as 55 Deluxe).
If your brake lights are on constantly, temporarily swap the Lime and Green wires on your stop switch, then test the TL system.
If you want to use a 2 pole switch, you will need to add a relay as such to accommodate the Lime wire to the TL system.
This schematic would also work for cars with positive ground, just reverse the diode orientation.
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