12
Test Procedures
TROUBLESHOOTING AND ELECTRICAL
SYSTEM: DIESEL VEHICLES
4.
Disconnect the three-pin connector (w122, w135, w108) between the fuel solenoid and the wire harness
5.
Disconnect the bullet connector, on the gray wire (w140), between the fuel pump and the wire harness
6.
Set the multimeter to the diode test function.
2120
Figure 12-22
Fuel Solenoid Three-Pin Connector
2121
Figure 12-23
Fuel Pump Bullet Connector
7.
Connect the black (–) probe of the multimeter to the frame (ground).
8.
Connect the red (+) probe of the multimeter to the 18-gauge gray wire (w140) at the bullet connector (wire
harness side).
9.
The reading should indicate an over limit (no continuity). If the diode conducts current (shows continuity) with
the meter probes connected as described, the diode has failed and must be replaced.
10.
Reverse the multimeter probes and note the reading. The multimeter should indicate approximately 540 mV,
however, a range of 400 to 700 mV is acceptable.
11.
If the readings obtained in the previous steps are incorrect, replace the diode.
TEST PROCEDURE 16 – Diode 4 on wire 129
See General Warnings, Section 1, Page 1-2.
1.
Disconnect battery.
See Side-Post Battery: Disconnecting the Battery – Gasoline/Diesel Vehicles on page
1-3.
See Top-Post Battery: Disconnecting the Battery- Gasoline/Diesel Vehicles on page 1-4.
2.
Disconnect the 16-gauge green wire (w127) from the starter solenoid coil
.
3.
Set the multimeter to the diode test function.
4.
Connect the black (–) probe to the frame (ground).
5.
Connect the red (+) probe to the 16-gauge green wire (w127) at the connector.
6.
The reading should indicate an over limit (no continuity). If the diode conducts current (shows continuity) with
the meter probes connected as described, the diode has failed and must be replaced.
7.
Reverse the multimeter probes and note the reading. The multimeter should indicate approximately 540 mV,
however, a range of 400 to 700 mV is acceptable.
Page 12-28
2016 Carryall 1500/1700 and XRT 1550 Maintenance and Service Manual
Summary of Contents for Carryall 1500 2016
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