MacDon M1170 - Preventing Electrical System Damage

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Figure 5.31: Roof Relay Module
The roof relay module is located inside the cab’s headliner.
Preventing Electrical System Damage
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A
B
Figure 5.32: Alternator
A - Negative Terminal B - Positive Terminal
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 (A) 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. Refer to 1.8 Welding 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 276 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.
MAINTENANCE AND SERVICING