TM 9-2320-273-20
Table 5-4. Engine Retarder Control Circuit Troubleshooting (Continued).
INSTRUCTION
INDICATION
YES
NO
REMARKS
1
NO RETARDING ACTION (Continued).
8
Check for voltage at
12 volts dc nominal.
Go to Step 9. Replace
circuit 52H and 52K
switch.
terminals of panel
ENGINE RETARDER
switch with switch in
HIGH position,
9
Check for voltage at
12 volts dc nominal.
Refer to Di-
Repair wir-
each solenoid valve,
rect Support ing (52J,
circuits 52J, 52L
Maintenance, 52L, 52M)
and 52M.
or connec-
tions.
5-34
Change 2
