ELECTRIC SYSTEM 5540F/YB5515 SERVICE MANUAL
3-6 Published 10-21-2010, Control# 198-04
Hour Meter
Power is available through the oil pressure switch on the
engine. The hour meter operates only when the engine is
running.
WIRE HARNESSES
Engine Wire Harness
The engine wire harnesses Figure 3-2 and Figure 3-3 supply
electrical current from the battery to the charging circuit,
starting circuit, and senders attached to the engine. It also
supplies the current to the main frame wire harness.
Main Frame Wire Harness
The main frame wire harness Figure 3-4 supplies electrical
current to operate the electrical components attached to the
main frame. It also connects to the instrument panel and
engine wire harnesses.
Instrument Panel Wire Harness
The instrument panel wire harness Figure 3-5 supplies
electrical current to the gauges, lights and switches in the
instrument panel. It connects to the main frame wire harness.
NOTE: For wire harness wiring diagrams, see Schematics/
Wiring Diagrams.
Table 3-4: Voltage Level Conditions
Voltage Measured Engine Speed Condition of Charging System
0-10 volts Stopped or low idle Battery discharged.
Low battery charge.
11-12 volts Above low idle.
Stopped or low idle.
Problem in charging system. See
Troubleshooting - Charging System.
Normal battery charge.
12-14 volts Above low idle. Problem in charging system. See
Troubleshooting - Charging System.
Battery fully charged - no load.
14-16 volts Stopped or low idle. If needle is between 14 and 15 bolts,
the battery is newly charged.
Overcharged battery.
More than 16 volts Above idle. Overcharge. See Troubleshooting -
Charging System
Reference Only
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