Operation CHARM: Car repair manuals for everyone.

Electronic PRNDL

Vehicles with automatic transmissions have an electronic Park Reverse Neutral Drive Low (PRNDL) range indicator. The system utilizes signals from the Neutral Safety Back Up (NSBU) switch on the side of the transmission Signals from this switch determine which LED's in the electronic PRNDL will light. Since the system is entirely electronic, there is no "adjustment".