EP Equipment CPD30L1-B, Service Manual

Page: 72 / 235

60
REV. 05/2020
OPERATING SYSTEM
6
6.6 Warning Light Switch
The warning light switch of this truck is used to
control the ON/OFF of warning light.
6.6.1 Removal and Installation
6.6.2 Faults and Causes
1
Fault Operate the switch, but the vehicle
responds with no action
Cause a. The switch failure;
b. The switch circuit not conducted.
2
Fault The switch not operated, the
vehicle responds with action
Cause
a. The switch failure;
b. The switch shorted
(short circuit)
Checking
-
Check if the appearance of the switch is in
good condition, and if the plug connection is
secure.
6.6.3 Checking and Testing
Testing
-
- Check if the switch circuit is conducted;
Carry out ON/OFF test to press button switch
with a multimeter:
Press button switch at original position, circuit
breakage;
press the button, circuit conducted.
6.6.4 Control Circuit Troubleshooting
-
-
-
-
Unscrew the two screws (1) and remove the
multi-way valve plate (2) of control panel (4);
Unscrew the two screws (3) and remove the
control panel (4) from the chassis;
Disconnect the connections between warning
light switch (5) and main wiring harness;
Remove the warning light switch (5) from the
control panel (4).
- Install according to the reverse order of rem-
oval.
Warning Light Switch Control Circuit
(Fig3131-30015SM)
Check if the circuit is broken by using a multi-
meter:
-
- Set the multimeter to ON-OFF;
Check if #4/#8/#12/#17 circuit is conducted.