TM 9-2320-272-24-1
Table 2-3. Electrical Troubleshooting Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test 2.
Test instrument cluster for short circuit.
1. Place battery switch to OFF position.
Step
Step
2. Remove instrument cluster panel (para. 3-83).
Step
3. Disconnect lead 27 from each gauge.
Step
4. Place battery switch to ON position.
5. Connect one lead of a 24-volt test lamp to lead 27 disconnected from engine temperature
Step
gauge and other lead to ground. Reconnect each lead 27 to its appropriate gauge, one at
a time, and note lamp indication. Test lamp should remain lit each time.
Step 6. Disconnect lead 27 at oil pressure gauge. Connect one lead of test lamp to lead 27
disconnected from oil pressure gauge and other lead to ground. Reconnect lead 27 to
engine temperature gauge. Test lamp should light.
If test lamp is dim, blinks on and off, or goes out when lead is connected to gauge,
replace oil pressure gauge (para. 3-86).
2-147
