REAR FLOOD LIGHTS INOPERATIVE

TM 10-3930-638-24&P

2-24. LIGHT SYSTEMS TROUBLESHOOTING (cont)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

7. REAR FLOOD LIGHTS INOPERATIVE (cont)

Turn IGNITION switch to OFF and remove key.

Step 1.

Disconnect 6 ampere circuit breaker wire from terminal on REAR FLOOD switch.

Connect ohmmeter leads to leads of 6 ampere circuit breaker.

If ohmmeter indicates less than 0.1 ohm, proceed to step 2.

If ohmmeter indicates more than 0.1 ohm, connect ohmmeter leads to vehicle ground and wire

on terminal of REAR FLOOD switch. If ohmmeter indicates less than 4.5 ohms, check for short

in wiring between REAR FLOOD switch and rear flood lights. Replace 6 ampere circuit breaker

after short is removed (para 2-28a).

Step 2. Connect ohmmeter leads to terminals of REAR FLOOD switch and set REAR FLOOD switch at

ON position.

If ohmmeter indicates less than 0.1 ohm, reconnect lead of 6 ampere circuit breaker to terminal

of REAR FLOOD switch and troubleshoot VEHICLE LIGHTS switch (para 2-24,

MALFUNCTION 1).

If ohmmeter indicates more than 0.1 ohm, replace REAR FLOOD switch (para 2-28a).

8. GAGE LIGHTS INOPERATIVE

NOTE

If one gage light operates normally, replace bulb in affected gage light

(para 2-18a). If gage light is still inoperative, check for open circuit in wire

between inoperative gage light and operating gage light.

Unscrew and remove cable connector from bottom of VEHICLE LIGHTS

switch.

Place main switch lever in any position other than OFF, and place auxiliary

switch lever in PARK or DIM position.

Connect ohmmeter leads to pins B and F of VEHICLE LIGHTS switch

and check for 20 to 30 ohms indication on ohmmeter, then place auxiliary

switch lever in PANEL BRT. position and check for less than 0.1 ohm

indication on ohmmeter.

If ohmmeter indicates more than 0.1 ohm in PANEL BRT.

position, or does not indicate 20 to 30 ohms in PARK and

DIM positions, replace VEHICLE LIGHTS switch (para 2-28b).

If VEHICLE LIGHTS switch resistance tests are satisfactory,

check for open circuit in wire or 40 ohm resistor between

terminal B of cable connector and gage lights.