TM  10-3930-638-24&P 2-24.   LIGHT   SYSTEMS   TROUBLESHOOTING   (cont) MALFUNCTION TEST OR INSPECTION CORRECTIVE  ACTION 7. REAR FLOOD LIGHTS INOPERATIVE (cont) Step 1. Turn IGNITION switch to OFF and remove key. Disconnect 6 ampere circuit breaker wire from terminal on REAR FLOOD switch. Connect ohmmeter leads to leads of 6 ampere circuit breaker. a. If ohmmeter indicates less than 0.1 ohm, proceed to step 2. b. 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. a. 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). b. 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. a. 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). b. 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. 2-111