TM 9-2350-256-20-1
0057 00
CORRECTIVE ACTION Continued
7.
Reconnect engine generator relays to voltage regulator wiring harness to switching box relay. Discon-
nect bulkhead to APU, master relay, and rigger's lights wiring harness at switching box relay. Place
red lead of multimeter in socket C of wire 61. Turn MASTER and APU GEN switches ON, start APU,
and check for voltage. Turn APU and MASTER and APU GEN switches OFF. If voltage is not present,
replace switching relay box (see WP 0162 00). If voltage is present, go to step 8.
8.
Place red lead on pin B of wire 478A. Turn MASTER and APU GEN switches ON, start APU, and
check for voltage. Turn APU and MASTER and APU GEN switches OFF. If voltage is not present,
replace switching relay box (see WP 0162 00). If voltage is present, go to step 9.
0057 00-6
