Thread: '51 Chevy taillight wiring

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"can I make the repair outside of the switch? as in jumper from the brake light switch to the LH turn/stop wire?"

No you will lose the turn signal function for the left side and end up with brake light only. It sounds like the switch is toast.

Does your switch look like the one pictured in the drawing, if so there is a very good chance you can just open it up.

Could be just a dirty wiper for the left side. Best suggestion hit it with some contact cleaner, aka tuner cleaner.


This guy shows a very similar wiring layout as you posted.

Universal Turn Signal Switch | 7-wire unit for vehicles with combination stop and turn signal lamps requiring brake light circuit.

BTW the only thing that makes the switch/unit 12v or 6v is the flasher.

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"you press the brake, and at the same time have one turn signal "on", in which case both rear lamps should be "bright", with one flashing for turn. I don't see how that is accomplished with this switch.''

* With RH turn selected; the switch opens the brake switch voltage path to the RH bulb. At the same time it creates a new path for the flasher voltage out the to the bulb. Think of it as a double poll single throw switch.

This is why only a turn flashing signal is seen out back when the break has been applied.