The D3 light should be grounded by the Selector switch to illuminate the dash indicator and since you have disconnected the selector switch wire harness and the lamp still shows ;
1. A/T control unit is bad causing the grounding. Unplug the A/T control unit and if lamps goes off, the control unit is bad.
2. A short circuit in the wiring circuit between meter cluster to selector switch or A/T control unit. This would be a job that is not going to be easy to track down.
Sunday, January 18th, 2009 AT 12:14 PM