TROUBLESHOOTING AND ELECTRICAL
SYSTEM: DIESEL VEHICLES
Test Procedures
12
2111
Figure 12-12
Start Relay Coil Circuit Test
2112
Figure 12-13
Start Relay Contact Test
TEST PROCEDURE 8 – Start Relay
See General Warnings, Section 1, Page 1-2.
1.
Disable the vehicle.
See Disabling the Vehicle on page 1-3.
2.
Disconnect the 16-gauge green wire (w127) from the starter solenoid coil to prevent the vehicle from
unintentionally starting
.
See following WARNING.
WARNING
• Failure to disconnect the wire from the solenoid coil could result in an unexpected engine start
when performing this test.
3.
Set the multimeter to 20 VDC.
4.
Place the probes to measure the voltage between the 16-gauge light green start relay wire (w110) terminal
and the frame ground
5.
Monitor the multimeter. The reading should indicate 0 volts with the key in the OFF and ON positions. The
reading should indicate approximately 12 VDC when the key is in the START position and the relay should click.
See following NOTE.
NOTE:
The fan and accessory relays may be removed to isolate the sound of the start relay click.
6.
If the reading is 12 VDC and the relay does not click when the key switch is turned to the START position,
replace the relay.
7.
If the reading is 12 VDC and the relay clicks when the key is in the START position, check the relay contacts.
7.1.
Set the multimeter to 200 ohms.
7.2.
Check for continuity between the 16-gauge green/white wire (w147) and the 16-gauge green wire (w128)
relay terminals
.
7.3.
Monitor the multimeter. The multimeter should not indicate continuity with the key in the OFF or ON
positions. The multimeter should indicate continuity when the key is in the START position.
7.4.
If the multimeter does not indicate continuity while the key is in the START position and the relay clicks, the
contacts have failed. Replace the relay.
2016 Carryall 1500/1700 and XRT 1550 Maintenance and Service Manual
Page 12-19
Содержание Carryall 1500 2016
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