Preventing Electrical System Damage - MacDon M1170NT5 Operator's Manual

The roof relay module is located inside the cab's headliner.

Preventing Electrical System Damage

To prevent electrical system damage, take the following
precautions:
• Carefully observe polarity when attaching booster battery.
• Do NOT short across battery or alternator terminals or allow
battery positive (+) cable (B) or alternator wire to become
grounded.
• Be sure alternator connections are correct before
connecting the cables to the battery.
• When welding on any part of the machine, disconnect
battery cables. For instructions, refer to
Precaution, page 9.
• Always disconnect battery ground cables when working with
the alternator or regulator.
• Never attempt to polarize alternator or regulator.
• If wires are disconnected from the alternator, refer to
Figure 5.32, page 261 to ensure proper connection.
• Never ground the alternator field terminal or field.
• Never connect or disconnect alternator or regulator wires
with battery connected or alternator operating.
• Always disconnect cables from the battery when using a
charger to charge battery in windrower.
• Ensure all cables are securely connected before operating
engine.
• To avoid damage to circuit boards by static electricity,
disconnect negative battery terminals when replacing
electronic control modules. Furthermore, when handling
electronic control modules, avoid touching the connector
pins directly.
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MAINTENANCE AND SERVICING
Figure 5.31: Roof Relay Module
1.8 Welding
Figure 5.32: Alternator
A - Negative Terminal
261
A
B
B - Positive Terminal
Revision A