Table 4-3. Organizational Troubleshooting Table - Continued
TEST OR INSPECTION
2. ONE OR MORE LAMPS ON CHASSIS OR BODY WILL NOT LIGHT (cont).
Step 4. Check lamp socket for dirt and corrosion.
Remove lamp and clean contacts.
If lamp socket is clean, proceed to step 5.
Step 5. Check plug and/or receptacle for dirty or corroded contacts.
Clean contacts if dirty or corroded.
If contacts are not damaged, proceed to step 6.
Step 6. Check for loose or broken ground wire at light assembly.
Repair or tighten ground wire, if defective.
3. ALL 12- OR 24-VOLT LAMPS ON VAN BODIES DO NOT LIGHT AND TAlLLIGHTS OPERATE
Step 1. Check that body cables are properly plugged into chassis receptacle.
Step 2. Pull plug out and reinsert it fully.
If plug is secure, proceed to step 3.
Step 3. Check for broken or loose ground wire at chassis receptacle.
Repair or tighten ground wire.
If ground wire not broken or loose, proceed to step 4.
Step 4. Check wiring for bare spots in insulation.
4. ALL 24-VOLT DOME LAMPS DO NOT LIGHT BUT CLEARANCE LAMPS OPERATE NORMALLY.
Check for improperly positioned or defective dome light switch.
Properly position or replace dome light switch (para. 4-22), if defective.
5. 110-VOLT DOME LAMPS DO NOT LIGHT AND 110-VOLTS AC NOT PRESENT AT WALL
Step 1. Check for defective external power source.
Replace or repair external power source.
If external power source not defective, proceed to step 2.
Step 2. Check that plug is properly seated in external 110-volt receptacle.
Pull plug out and reinsert it fully.
If plug is properly seated, proceed to step 3.
Step 3. Check fuse box for blown 60 amp fuse (one or both).