TM 5-3805-262-203-11. LIGHT SYSTEMS TROUBLESHOOTING (CONT)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION9. VOLT METER LIGHT OR INSTRUMENT CLUSTER GAGE LIGHTS DO NOT OPERATE (Cont).Step 2. Place cab dome light switch in on position.a. If cab dome light is on, go to step 3 below.b. If cab dome light is off, go to step 4 below.Step 3.Reach behind right instrument panel and connect multimeter betweeneach terminal of 15 ohm resistor and cab, sheet metal.Multimeter should indicate at least 5 volts for both terminals.a . I f m u l t i m e t e r i n d i c a t e s a t l e a s t 5check gray wire connection from 15cluster connector pin 8. Repair oras necessary (page 5-168).v o l t s f o r b o t h t e r m i n a l s,ohm resistor to instrumentreplace wiring or connectorb. If multimeter indicates zero for both terminals, check gray wireconnection from 15 ohm resistor to dimmer compartment lightsc o n t r o l . R e p a i r o r r e p l a c e w i r i n g o r t e r m i n a l a s n e c e s s a r y ( p a g e 5-168) .c. If multimeter indicates at least 5 volts at one terminal andzero at remaining terminal, remove right instrument panel (page5-48) and replace 15 ohm resistor (page 5-53).Step 4. Place vehicle lights switch in PANEL BRT position.Cab dome light should be on.a. If cab dome light is not on, go to step 5 below.b. If cab dome light is on, remove right instrument panel (page5-48) and replace vehicle lights switch (page 5-53).Step 5. Reach beneath right instrument panel and connect multimeter betweeneach terminal of dimmer compartment lights control and cab sheetm e t a l .Multimeter should indicate 24 volts for both terminals.a .If multimeter indicates 24 volts for both terminals, checkw i r i n g c o n n e c t i o n f r o m d i m m e r c o m p a r t m e n t l i g h t s c o n t r o l t o 15ohm resistor and cab dome light. Repair or replace wiring orterminals as necessary (page 5-168, 5-184, 5-188, or 5-192).3-91
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