TM 5-3805-262-20
3-10. INSTRUMENT PANELS TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. BRAKE WARNING LIGHT DOES NOT OPERATE (Cont).
Step 2.
Place ignition key switch in on position.
At right instrument panel, at switch on parking brake valve, connect
a jumper wire from terminal of parking brake switch to ground.
Brake warning light should be on.
a. If brake warning light is on, remove
parking brake switch (page 5-48).
b. If brake warning light is not on, go
jumper wire. Replace
to step 3 below.
Step 3.
Place ignition key switch in off position.
Remove parking brake switch resistor (page 5-48).
Connect multimeter across ends of resistor.
Multimeter should indicate 36 to 44 ohms.
a. If multimeter does not indicate 36 to 44 ohms, install new re-
s i s t o r ( p a g e 5 - 6 3 ).
b. If multimeter indicates 36 to 44 ohms, check wiring connection
between parking brake switch, fuseholder, and instrument cluster
for open circuit . Repair or replace wiring as necessary (page
5-168).
If wiring is okay, reinstall resistor (page 5-63) , remove in-
strument cluster (page 5-34) , and replace circuit board (page
5 - 3 9 ).
3-74
