TM 9-2320-280-20-1
REFERENCE INFORMATION
Change 1 2-339
It is important to connect the leads as indicated because you
are checking continuity across a diode. The lamp will glow
dimly because you are supplying a small amount of power thru
STE/ICE-R. You may have to shade the lamp with your hand
to see if it glows.
NOTE
A multimeter may not supply enough power to light the lamp.
In this case look for a much greater resistance when measuring
with the leads connected in one direction than when they are
connected in reverse.
BATTERY VOLTAGE
MULTIMETER
1. Set the voltmeter to a DC volts scale of at
least 40 volts.
2. Connect the RED lead to positive and the
BLACK lead to negative.
3. Be sure to read the correct scale.
CONTINUITY (RESISTANCE)
MULTIMETER
1. Set the voltmeter to an ohms scale of about
1000 ohms.
2. Connect the RED and BLACK leads to the
connections stated in the question.
3. Be sure to read the correct scale. Less than
5 ohms indicates continuity. For an open
circuit, the meter should peg full scale (needle
all the way to the left).
C
BODY CONNECTOR
BRAKE WARNING
LAMP
27
27L
27P
27D
27F
27K
67
67D
67B
67C
67E
79A
67A
PRESSURE
SWITCH
PARK
BRAKE
SWITCH
INSTRUMENTS CIRCUIT
Replace harness/or repair wiring, refer to (para. 4-85).
Replace brake warning lamp, refer to (para. 4-17).
0-45 DC VOLTS
STE/ICE-R TEST 89
1. Connect RED clip to the indicated test point,
BLACK clip to negative or ground.
2. Start Test 89, DC volts.
3. Displayed reading is in volts.
0-4500 OHMS
STE/ICE-R TEST 91
1. Connect RED clip and BLACK clip to the
indicated terminals in the question. RED to the
first, BLACK to the second.
2. Start Test 91, 0-4500 ohms.
3. Displayed reading is in ohms. Less than 5 ohms
is continuity. If the resistance is over 4500 ohms,
STE/ICE displays “9.9.9.9.”
PROTECTIVE CONTROL
BOX/
DISTRIBUTION BOX
