Molly Ayala
Replacing the battery of your Harley-Davidson Electra Glide is a simple task that can be done at home in under an hour. The process involves removing the seat, disconnecting the terminal cables, and carefully installing a new battery. This guide will take you through the step-by-step process of removing and replacing the battery, as well as offer tips for proper maintenance to ensure a smooth ride.
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What You'll Learn
Removing the seat and battery cover
To remove the battery of an HD Electra Glide, you will first need to remove the seat and battery cover. This process is relatively simple and can be done in your own garage.
Start by locating the seat strap. If your bike has a strap across the seat, attached behind the saddlebags, you will need to unbolt it using a 7/16" socket or wrench. Only one side of the strap needs to be removed, and it can then be flipped over to facilitate the removal of the seat. With the strap removed, you can now remove the seat. There may be a Phillips head screw or a thumb screw that mounts the seat to the rear fender; remove this screw with a Phillips head screwdriver. With the screw removed, you can now lift the seat off of the bike and set it aside.
With the seat removed, you will now have access to the battery cover. The battery cover is typically made of plastic and contains the engine computer management system (ECM) and, on some bikes, the antenna for the security system. If your bike has a security system, simply slide it out of its clip to remove it. The ECM is usually held in place by two plastic clips and may also have a T40 Torx bolt. Use a T40 Torx bit to remove the bolt, then pull the ECM off of the battery. With the ECM and security system removed, you now have access to the battery and can proceed with the battery removal process.
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Disconnecting the terminals
First, locate the battery. On many HD Touring bikes, the battery is positioned under the seat. Remove the seat by unbolting the seat strap with a 7/16" socket or wrench. If your bike has a saddlebag, you can remove it by opening the lid, turning the thumb screws, and lifting the bag off. This step will provide better access to the battery.
Once the battery is accessible, you'll see a plastic cover over it. This cover houses the engine control management system (ECM) and possibly the antenna for the security system. Slide the security system out of its clip if it's present. Then, unclip the ECM by removing any plastic clips and Torx bolts holding it in place. You won't need to unplug the wiring.
Now, it's time to disconnect the battery terminals. It's important to do this in the correct order to avoid voltage spikes that can damage your electronics. Always start by disconnecting the negative (black) terminal first, followed by the positive terminal. Use a Phillips head screwdriver to carefully loosen and detach the terminal cables.
After disconnecting the terminals, you can proceed to remove the battery itself. Be cautious when handling the battery, as it may be heavy. Pay attention to any fuses or alarms mentioned in your bike's manual, as some models have specific procedures to follow during battery removal.
Remember to wear protective gear, such as gloves and eye protection, during the process. Taking clear photographs of the battery setup before removal can also be helpful for future reference during reassembly.
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Removing the ECM
To remove the ECM, start by removing the seat. This will expose a plastic cover over the battery that contains the ECM and, on some bikes, the antenna for the security system. If you have a security system, simply slide it out of its clip to move it aside.
The ECM is typically held down by two plastic clips and may also be secured with a T40 Torx bolt, depending on the year of the bike. Use a T40 Torx bit to remove the bolt if necessary, then pull the caddy off of the battery. With the caddy removed, you can now access and remove the ECM.
Unclip the ECM and set it aside. There is no need to unplug the wiring. Once the ECM is removed, you will have access to the battery. It is important to note that when disconnecting the battery, always start with the negative (black) terminal before moving on to the positive terminal to avoid any voltage spikes that can damage your electronics.
Reinstalling the ECM is simply a matter of reversing the steps outlined above. Ensure that the Torx bolt is tight and secure before replacing the seat and starting the bike.
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Installing the new battery
To install the new battery, carefully position the strap correctly to help with future battery removal. Reinstall the positive terminal first, then the negative. Replace the caddy and the ECM, ensuring the Torx bolt is tight. If your bike has a security system, replace this too.
Now, replace the seat by sliding the front into the guide, then push the back end down and replace the Phillips head screw. Put the seat strap back and replace the 7/16" bolt. Replace the saddlebag, making sure it is secure after turning the thumb screws.
If you have an HD audible alarm, you will need to turn the ignition on and then remove the 50a fuse before removing the battery. After removing the fuse and battery, turn the ignition switch off to prevent voltage surges.
Once the new battery is installed, turn the key to the accessories switch before reconnecting the battery and reinstalling the fuse.
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Reassembling the bike
When reassembling your Harley-Davidson Electra Glide after removing the battery, it is important to follow the correct steps to ensure a safe and secure installation. Here is a detailed guide to help you through the process:
- Begin by placing the new battery in the battery compartment, ensuring it is positioned correctly and securely.
- Connect the battery cables, starting with the positive cable first. Attach the positive cable to the positive terminal on the battery, making sure the connection is tight and secure.
- Next, connect the negative cable to the negative terminal. Ensure that the connection is secure and that the cable is properly routed and clear of any moving parts.
- If your Electra Glide model has an alarm system, you may need to follow additional steps. Refer to your motorcycle's manual or seek advice from a Harley-Davidson technician for specific instructions pertaining to your model.
- Reinstall the battery hold-down, ensuring it is securely fastened. This will keep the battery in place and prevent it from moving or vibrating during operation.
- Carefully inspect all wiring connections for any signs of damage or corrosion. Ensure that all connectors are clean and tightly secured.
- Reinstall the solenoid assembly and the top caddy that covers the battery. These components may require some effort to properly align and secure.
- Finally, reassemble any remaining components in the reverse order of removal. Ensure that all fasteners, screws, and bolts are tightened securely to avoid any rattling or loose parts.
It is important to note that the reassembly process may vary slightly depending on the year and model of your Harley-Davidson Electra Glide. Always refer to the official Harley-Davidson service manual or seek advice from a qualified technician if you have any questions or concerns during the reassembly process.
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Frequently asked questions
First, remove the seat. Then, pull the ECM out of the way and remove the battery cover. If your bike has a security system, simply slide it out of its clip. Next, use a T40 Torx bit to remove the mounting bolt and pull the caddy off the battery. Finally, use a Phillips head screwdriver to disconnect the terminal cables, starting with the negative (black) terminal.
Yes, it is recommended to always remove the fuse before performing any electrical work, especially before disconnecting the battery.
No, you do not need to remove the saddlebag. Since Harley moved the battery under the seat in the mid-1990s, you can access the battery by removing just the seat.
When disconnecting the battery, always start with the negative (black) terminal, followed by the positive terminal. When reconnecting, do the opposite: start with the positive terminal first, then the negative.
It is recommended to replace the battery every three years, especially if you plan on taking long rides. Replacing the battery is a simple job that can be done in less than an hour and will cost you about $100.
