TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download

TM 9-2320-387-24-l LIGHTS DIAGNOSTIC FLOWCHART - II DO ANY LIGHTS WORK AT ALL? TEST OPTIONS: BATTERY VOLTAGE AT SOCKET F OF LIGHTS SWITCH CONNECTOR HARNESS? Y 1. STEACE-R TEST 89 (Page 2-53.X) 2. MULTIMlZl-ER FAULTY LIGHTS SWITCH \ I The following steps are not diagnostics. They are supposed to give you some simple checks before you try to change a wiring harness that may be ~. 1 r TEST OPTIONS: El-zz- BAlTERY VOLTAGE AT PIN F OF PROTECTIVE CONTROL BOX BODY CONNECTOR? (ON THE PCB) I. STEIICE-R TEST 89 (Page 2306) 1 t For repair/replace -I I : instructions, notify I I 1. Make sure that what you want to be on is supposed to be on. Check the ; DS maintenance t switches (lights, high-low beam, etc.). i (chapter 18). I I : 1 2. Check the socket and connection(s) for corrosion, cracks, or loose parts. Repair or replace any damaged components. i I : I I ; 3. Try replacing the bulb that doesn’t work with a bulb that you know works. I i i 4. If the connections look good and a known good bulb doesn’t work, you have : ; I I to start checking voltage and continuity. : I : I I : 1 a) Check for battery voltage (STEXE-R TEST 89, Page 2-506) at the I : I light socket; there may be a fault in the wiring harness. : I I I b) Check for continuity to ground (STWICE-R TEST 91, Page 2-508) I : i I from the light socket; there may be a missing connection to ground. i I I I I I 1 c) Go to the wiring diagram(s) for more help. I I I i c For repair/replace instructions, refer to para. 4-4. - 2-376