TM 9-2320-387-24-l
DIAGNOSTIC FLOWCHART
INSTRUMENTS CIRCUIT
KNOWN INFO
I
TEST OPTtONS
BRAKE LAMP DOESN’T
1. STUICE-R
TEST 89
COME ON
DISCONNECT WIRE 27L AT THE
BRAKE WARNING LAMP.
(Page 2-508)
POWER AVAilABLE
TO
2. MULTIMETER
THE GAUGES
WITH THE ROTARY SWITCH IN THE
RUN POSITION, DO YOU HAVE
POSSIBLE
PROBLEMS
BATTERY VOLTAGE AT WIRE 27L?
REASON FOR QUESTION
This wire provides power for
I
I
the lamp.
PARKING BRAKE SWITCH
BRAKE LAMP
WIRING
r % D2
i TEST OPTIONS
1. STEXE-R
TEST 91
(Page 2-508)
DISCONNECT WIRE 67D AT BRAKE
LAMP. CONNECT RED LEAD OF
STE/ICE-R OR MULTIMETER TO
WIRE 67. CONNECT THE BLACK
LEAD TO WIRE 27.
2. MULTIMETER
KNOWN INFO
POWER AVAILABLE
TO
THE LAMP
DOES THE LAMP GLOW DIMLY?
POSSIBLE
PROBLEMS
REASON FOR QUESTION
You need to know that the
lamp will light.
PARKING BRAKE SWITCH
BRAKE LAMP
WIRING
r
TEST OPTIONS
KNOWN INFO
BRAKE LAMP OK
1. STEIICE-R TEST 91
(Page 2508)
2. MULTIMETER
DISCONNECT WIRE 67C AT
PARKING BRAKE SWITCH.
DO YOU HAVE CONTINUITY
BETWEEN WIRE 67C AT THE
SWITCH & WIRE 67D AT THE
LAMP?
REASON FOR QUESTION
If either of these wires are
open, the lamp circuit will not
be grounded.
POSSIBLE
PROBLEMS
PARKING BRAKE SWITCH
WIRING
2-324
