Saturday, February 7, 2015

Turns as Stop Lights Magic

Did some research on the web last year to find out how to turn turn signals into stop lights. I found this page How to Make a 2-wire Bulb Display Brake and Turn Signals. His page sometimes doesn't come up readily so I will replicate his info here, but give him all the credit.

The idea is to use 3 single pole double throw relays to feed power to the turns at the appropriate times. Normally they are off, but if the brake switch (light) is on, then power is fed to both the turns. Then if a signal is on at the same time as the brake, the signal feed alternates the appropriate turn relay causing the flash. And if the brake switch is off, then the signal feed alternates the appropriate turn relay providing power. Smoke and mirrors.

First the schematic.


Then, the pictorial of the relays.


The schematic shows diodes, but apparently with the brand of relay shown, it's not required.

Note, you WILL need to replace your turn signal flasher with one for LED lamps since the relays draw so little power.

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