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1993 Lexus LS400 Question: tranny does not shift at night with the lights on

 

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Visitor, 4.0L V8, El Cajon, CA, May 04, 2011, 19:14

why my transmission does not shift at night with the lights on?

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, May 04, 2011, 23:00
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     Master

    It sounds like perhaps a ground is bad but all electrical connections would have to be looked at to see if when the lights or other electrical loads are on is there a voltage drop due to bad connections or grounds.

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  • Medium-star Best Answer
    overbys from Overbys Inc, May 05, 2011, 07:00
     Master

    check the wiring harness in your trunk hinge. open it up and check for bare/crossed wires. this is really common and
    causes voltage "feedback" when the lights are on.

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