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R34 Reverse Light Wiring Manual Convert

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  • R34 Reverse Light Wiring Manual Convert

    Hey team,

    My first post on these forums but I have just purchased a 99' R34 sedan running just a rb25de with a sr20det manual box.
    Now I have found the reverse switch output on the gear box but I have no clue where I need to link this plug to get the reverse lights to come on when I put it into reverse.
    It is just dangling off the side of the box with no other spare wires anywhere to be seen..

    Help please

  • #2
    What was in the car originally? I'm guessing an auto box, and then you will need to find where it's reverse switch was. For my Toyota it's where the shifter cable connected to the auto box, in a connector with 7 wires.

    Your best bet is to search the internet for the wiring diagrams for your car as it was originally and find the reverse switch in there.

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    • #3
      Some cars its a little mitcroswitch that the shifter shaft hits
      Permanent rev limiter = the crank popping out to say ELLO!!!!

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      • #4
        Can you pull the entire switch assembly out of the tranny block?

        It looks like one of the switch wires actually came out of the switch itself. The best bet to have a reverse light switch is to look for a replacement switch assembly, but you may be able to repair the existing one. Unsure of the reliability on DIY repair of a switch used largely as a safety indicator, and to let the car know it's reversing.

        As the other dudes said, best look at a wiring diagram/schematic of the electrical system. Especially if it started out life as an automatic car, with a manual/guide you should be able to locate the wires where the switch used to connect to and patch 'em in. I would recommend soldering the wires once for reliability once you've located the original wire location and confirmed it's working.

        Jared

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