1993 Lexus LS400 Q&A

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

why my transmission does not shift at night with the lights on? -
Answer 1
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. -
Answer 2
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. -