Service Electrical

Battery Warning

WARNING: Battery posts, terminals and related accessories contain lead and lead components, chemicals known to the State of California to cause cancer and reproductive harm. Wash hands after handling.

Service the Battery Safely

c CAUTION: Avoid injury! Battery electrolyte contains sulfuric acid. It is poisonous and can cause serious burns:

• Wear eye protection and gloves.

• Keep skin protected.

• If electrolyte is swallowed, get medical attention immediately.

• If electrolyte is splashed into eyes, flush immediately with water for 15-30 minutes and get medical attention.

• If electrolyte is splashed onto skin, flush immediately with water and get medical attention if necessary.

The battery produces a flammable and explosive gas. The battery may explode:

• Do not smoke near battery.

• Wear eye protection and gloves.

• Do not allow direct metal contact across battery posts.

• Remove negative cable first when disconnecting.

• Install negative cable last when connecting.

Removing and Installing Battery


IMPORTANT: Avoid damage! The battery drain tube allows excess battery acid to flow away from the machine. Make sure the tube opening is free of obstruction.

Removing:

1. Park the machine safely. (See Parking Safely in the SAFETY section.)

2. Secure the operator seat in the raised position.

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3. Remove service access panel (A) below operator seat platform.

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4. Loosen wing nuts (B) to remove battery hold-down (C).

5. Disconnect negative (-) battery cable (D).

6. Push red cover away from positive (+) battery cable (E) and disconnect cable from battery.

7. Remove battery.

Installing:

1. Install battery into vehicle.

2. Check cell caps to be sure vent holes are open.

3. Connect positive (+) cable to battery positive (+) terminal first, then negative (-) cable to battery negative (-) terminal.

4. Apply spray lubricant on battery terminals to help prevent corrosion.

5. Install battery hold-down. Tighten wing nuts.

6. Install service access panel.

7. Lower operator seat.

Cleaning Battery and Terminals

1. Park machine safely. (See Parking Safely in the SAFETY section.)

2. Disconnect and remove battery.

3. Wash battery with solution of four tablespoons of baking soda to one gallon of water. Be careful not to get the soda solution into the cells.

4. Rinse the battery with plain water and dry.

5. Clean terminals and battery cable ends with wire brush until bright.

6. Install battery.

7. Attach cables to battery terminals using washers and nuts.

8. Apply spray lubricant to terminal to prevent corrosion.

Using Booster Battery

c CAUTION: Avoid injury! The battery produces a flammable and explosive gas. The battery may explode:

• Do not smoke or have open flame near battery.

• Wear eye protection and gloves.

• Do not jump start or charge a frozen battery. Warm battery to 16°C (60°F).

• Do not connect the negative (-) booster cable to the negative (-) terminal of the discharged battery. Connect at a good ground location away from the discharged battery.

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A - Booster Battery

B - Disabled Vehicle Battery

1. Connect positive (+) booster cable to booster battery (A) positive (+) post (C).

2. Connect the other end of positive (+) booster cable to the disabled vehicle battery (B) positive (+) post (D).

3. Connect negative (–) booster cable to booster battery negative (–) post (E).


IMPORTANT: Avoid damage! Electric charge from booster battery can damage machine components. Do not install negative booster cable to machine frame. Install only to the engine block. Install negative booster cable away from moving parts in the engine compartment, such as belts and fan blades.

4. Connect the other end (F) of negative (–) booster cable to a metal part of the disabled machine engine block away from battery.

5. Start the engine of the disabled machine and run machine for several minutes.

6. Carefully disconnect the booster cables in the exact reverse order: negative cable first and then the positive cable.

Checking Interlock Module

The interlock module is a diagnostic tool to help the operator verify correct electrical functions of the machine. For the module to function correctly, all input switches, output solenoids and relays must be connected and functioning properly.

1. Park the vehicle safely. (See Park Safely in SAFETY section.)

2. Secure operator seat in the raised position.

3. Turn the key to the RUN position.

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4. Locate interlock module (A).

NOTE: The module is equipped with a diagnostic light which indicates if the module is functioning correctly. When the module is functioning correctly, the diagnostic “HEARTBEAT” light (B) will be illuminated and blinking whenever the key switch is turned to the RUN position.

5. Check to see if the diagnostic “HEARTBEAT” light is blinking.


IMPORTANT: Avoid damage! DO NOT remove interlock module from position under operator seat platform if diagnostic heartbeat light fails to operate. If the heartbeat light is not illuminated and blinking when the key switch is turned to the RUN position, this may indicate that the interlock module is without power or not functioning correctly.

6. Check:

• Check to see if battery is charged. Charge if needed.

• Battery connections.

• Blown 15-amp key switch fuse (C).

• Electrical harness connections.

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7. If starter does not engage, use the module display lights (D) and diagnostic codes to diagnose the problem. The module display lights will illuminate as each function switch is actuated.

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Picture Note: Diagnostic code label is located on side of console.

8. Turn and hold key to START position and note diagnostic code the “HEARTBEAT” light displays:

• PARK BRAKE diagnostic code: one flash, a short pause and two additional flashes. This code sequence indicates that the park brake switch has not been activated. Lock park brake to start engine.

• BACKLAP SWITCH diagnostic code: two flashes, a short pause and two additional flashes. This code sequence indicates that the backlap valve is in the backlap position. Turn off backlap valve and start engine.

• MOW SWITCH diagnostic code: one flash, a short pause and three additional flashes. This code sequence indicates that the mow switch is activated. Move mow-transport lever to the transport position to start engine.

9. If further diagnostic assistance is needed, refer to the Technical Manual or consult your John Deere distributor.

Checking and Replacing Fuse


IMPORTANT: Avoid damage! The electrical system may be damaged if incorrect replacement fuses are used. Replace the bad fuse with a fuse of the same amp rating.

1. Park the vehicle safely. (See Park Safely in the SAFETY section.)

2. Secure operator seat in the raised position.

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3. Locate fuse holder (A) under operator seat platform.

4. Open fuse holder.

5. Check fuse visually for a broken filament.

6. Replace fuse if defective.

7. Close fuse holder.

8. Lower operator seat.

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