Table 3-1. Operator Troubleshooting Procedures (Con't).
TEST OR INSPECTION
CONVOY WARNING LIGHT DOES NOT OPERATE
Check that tractor's 12-volt intervehicular electrical cable is connected to semitrail-
er's 12-volt electrical connector (see paragraph 2-12). Convoy warning light does
not operate on 24 volts.
Connect tractor's 12-volt intervehicular electrical cable to semitrailer's 12-volt
Check that convoy warning light toggle switch on front face of roadside light box is
Check that cable of convoy warning light is plugged into receptacle of condulet at
Plug cable of convoy warning light securely into receptacle of condulet at rear
Perform all steps of Malfunction 2, "One or More Lamps Fail to Light".
DIM OR FLICKERING LIGHTS
Check tractor battery for adequate charge (see TM 9-2320-273-10 or
Have unit maintenance charge or replace tractor battery as required.
Check for damage to tractor's intervehicular electrical cable (see
TM 9-2320-273-10 or TM 9-2320-283-10). Check for dirty or corroded pins on elec-
Clean pins on semitrailer electrical connectors with a wire brush or clean rag
and apply corrosion preventive compound (Item 7, Appendix E). If damage to
tractor's intervehicular electrical cable or electrical connectors on
semitrailer's voltage control unit is found, notify unit maintenance.
NO BRAKES OR INSUFFICIENT BRAKES
Check air pressure gage in tractor. It should read at least 65 psi (448 kPa) (see
TM 9-2320-273-10 or TM 9-2320-283-10).
If air pressure gage reads low, notify unit maintenance.
SERVICE air coupling is blue.
Check that intervehicular SERVICE air coupling is properly connected (see para-
Connect air coupling properly. Connect tractor's SERVICE air coupling to