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Blinking Transmission Lights but already replaced PNP 900

Well assuming probably wasn't the right way to go, but all in all, the pnp switch is a good assumption, considering... What year is it? If it is pre 96 we can read the codes manually and go from there. A TP sensor will set a tranny code, the mode selector can set a code, a solenoid in the tranny can set a code, a vehicle speed sensor (signal or lack of) can set a code...you get the idea...

Also, just as someone just mentioned, you can unhook the battery and erase the computer memory, but it won't help you with learning what actually caused the code.

Chris






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