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mystery wires on the engine 200 1982

I have a black-covered set of wires (white, red, and ground) that plugs into the block a couple inches below and behind the block coolant drain, where the engine ends and the transmission starts. The wire goes from there to a connector that is bolted to the cam cover. The connector has a cap on it suggesting that it was put there at the factory. The engine is an '82 B23E with K-jet from a GLT. Is there something missing? Or is it part of a factory 'option' that my car did not get? Anyway, my curiosity has been piqued. Any help is good...


bben








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    mystery wires on the engine 200 1982

    That sensor and connector are used at the factory and with a special Volvo tool(mono-tester?) to set the timing I believe.








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      mystery wires on the engine 200 1982

      Absolutely correct according to the New Car Features book for 1981. Either the Volvo Mono-Tester or the Magnetic Timing unit can be used.
      I wondered about that for about a year before I saw the picture in that book.
      --
      1981 242GLTurbo 1967.5 122S Automatic (Project)








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        mystery wires on the engine 200 1982

        All right! Mystery solved. Can those testers be used by 'shade-tree' types or are they used only by garages? Can you hook up your trusty electronic voltmeter?


        bbben







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