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1981 911SC Tachometer Instrument Lighting


Vehicle Information: Model: 911SC; Year: 1981; Body Type: Targa; Total Mileage: 100,100;

The back lighting for the tachometer and the high beam indicator lightwill not stay light when the lights are turned on. If I ground the tachagainst the steering wheel when I remove it from the rubber seal thatholds it in place in the dash they work fine. Is there a ground wire thatI do not see? There are three connections at the back of the tach. Theyare numbered one through three. There are four wires that come to thetach. Three of them only have a female connector. The fourth wire alsohas a male end so that one of the other three wires can connect to thiswire before it plugs into the tach. Can you tell me the color code sothat I can plug these in correctly to the three male connections on thetach?

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