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–
+
ELEC
SIGNALING SYSTEM
3. Voltage
• Connect the pocket tester (DC 20 V) to the
indicator light assembly 1 coupler.
Tester (+) lead
→
Brown terminal
1
Tester (–) lead
→
White/Blue terminal
2
*
Br
B
/
G
Br
W
/
L
Br
W
/
Y
Br B
/
G
Br W
/
Y
Br W
/
L
1
2
MEETS
SPECIFICATION
• Turn the main switch to “ON”.
• Check the voltage (12 V).
OUT OF SPECIFICATION
The wiring circuit from the main switch to the
bulb socket connector is faulty, repair it.
4. Diode 2
• Remove the diode from the coupler.
• Connect the pocket tester (
Ω
×
1) to the
diode terminals as shown.
• Check the diode for continuity as follows.
CORRECT
Tester (+) lead
→
Blue/Black terminal
1
Tester (–) lead
→
White/Blue terminal
2
Continu-
ity
Tester (+) lead
→
White/Blue terminal
2
Tester (–) lead
→
Blue/Black terminal
1
No conti-
nuity
This circuit is not faulty.
NOTE:
When you switch the tester’s positive and neg-
ative probes, the readings in the left chart will
be reversed.
1
2
L
/
B
W
/
L
INCORRECT
Replace the diode 2.
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