PSEU light on with fault code Dispatch Fault A 32-66007 and Dispatch Fault B 32-66017
Replace the M1456 Auxiliary Dim/Test Module
Switch the Master Test ,Bright and Dim test switch between positions.
Troubleshooting found the C5 diode was shorted in the auxiliary dim and test module M1456,
and that the terminations for the C5 and C6 diodes showed signs of overheat.
Thanks to Tom S. for his input !