If the turn signals are the same bulb as the brake lights and you wire the third brake light with diodes, if you use the turn signal without the brakes on, the third brake light will flash with either turn signal. ONLY when you also have the brakes on with the turn signal will the third brake light stay on solid. The third brake light needs to be fed from a separate wire from the output of the brake switch BEFORE the flasher.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.