3-6 Published 11-22-2016, Control # 345-12
ELECTRICAL SYSTEM RT9130E-2 SERVICE MANUAL
MAINTENANCE
General
Electrical system maintenance includes troubleshooting and
replacement of damaged components. Observe standard
wiring practices when replacing components.
General Troubleshooting
NOTE: Make voltage checks at terminations when
components are installed and operating. Make
continuity checks (with batteries disconnected)
when components are isolated or removed.
Troubleshoot per the following guidelines:
1. First, use reported symptoms to identify a problem or a
suspect component.
2. Test the suspect component per instructions in this
section. The instructions identify the components and
guide you from the easiest and most likely problems to
the hardest and least likely problems.
3. Using a multimeter, test the circuit for continuity if you
suspect a broken circuit or for voltage if you suspect a
power problem. Check the electrical schematic and
wiring diagram for most accurate wiring information.
4. If the component proves faulty, replace it with a known
working component. If wiring proves faulty, replace it
with wiring of equal diameter, or gauge.
5. After troubleshooting, test the repaired circuit. Verify the
circuit works properly.
Troubleshooting Engine Starting Problems
1. Verify the battery terminals are connected and clean, the
transmission is in neutral, and the machine is fueled.
2. Try to turn on the headlights, tail lights, marker lights,
dome light, work light, or gauge lights and panel lights to
verify the batteries have at least some charge. If none of
these lights come on, suspect the batteries. Charge
batteries as needed, or replace the batteries if they fail to
hold a charge.
3. If you hear the starter relay clicking repeatedly, power is
reaching the starter, but not enough. Suspect the
batteries. Charge, or replace, the batteries as needed if
you can jump-start the crane from another vehicle.
4. Check Fuse 52 (100 amp) inside battery box. If fuse is
blown, replace it.
5. Turn the ignition switch to RUN (1). Check the voltmeter.
If it doesn’t move (but the headlights, tail lights, marker
lights, dome light, work light, or gauge lights and panel
lights will come on), suspect the ignition switch and the
power circuit to it starting at the ignition switch fuse.
Repair or replace circuit, switch, or fuse as needed.
6. If the battery, fuses, ignition switch, and power circuit to
the ignition switch check out, do one of the following:
a. If you hear no noise when you try to turn the starter,
troubleshoot the start circuit (ignition switch, electric
shifter, and wiring from ignition switch to the module
located in the steering column, on the carrier,
troubleshoot the resister located in the fuse box in
fuse #10 location, see Figure 3-6. Also troubleshoot
carrier center module located above the battery box
for starter lockout signal, pin B16 must have 12v to
allow starter to engage and pin B13 must have 12v
when key is in start position to send a signal to start
relay (K303). Make repairs as needed.
b. If the engine still won’t start, and you hear no noise
or just a single click, suspect the starter.
Troubleshoot the start circuit from the starter relay
through the starter solenoid to the starter motor and
ground. Make repairs as needed. If the starter
solenoid or the starter motor is faulty, replace the
starter.
c. If the starter engages but can’t turn the engine (and
the lights dim, signaling power drain during start
attempt), check the starter’s feed circuit from the
batteries for resistance. If the resistance is high,
make repairs. If the circuit checks out, replace the
starter. If the engine still won’t start, suspect a
seized engine.
CAUTION
If it is necessary to perform electrical maintenance on live
or hot circuits, remove all rings, watches, and other
jewelry before performing maintenance as serious burns
result from accidental grounding or shorting circuits.
Ensure the batteries are disconnected before performing
any maintenance on an electrical circuit which is not fused
or when performing continuity checks.
CAUTION
Never replace original wiring with wiring of a smaller size
(gauge).
CAUTION
Many steps in the troubleshooting procedures require
testing live (energized) components. Perform these steps
observing good safety practices to avoid electrical shock
injury.
To Next Page
Loading...
Need help?
General
