​How To Wire A Harmar Wheelchair Lift?

Content Menu

● Safety Precautions

● Tools and Materials Required

● Step-by-Step Wiring Instructions

>> 1. Prepare the Wiring Harness

>> 2. Connect to the Battery

>> 3. Route the Harness

>> 4. Secure the Lift-End Connector

>> 5. Finalize Connections

● Troubleshooting Common Issues

● Maintenance Recommendations

● Frequently Asked Questions

● SCitations:

Installing a Harmar wheelchair lift requires careful attention to electrical wiring to ensure safe and reliable operation. This guide provides a step-by-step approach to wiring the lift, emphasizing compliance with manufacturer guidelines and industry standards.

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Safety Precautions

Electrical Safety

- Disconnect the vehicle's battery before beginning any wiring work to prevent accidental short circuits.

- Wear insulated gloves and safety glasses to protect against electrical hazards.

Environmental Considerations

- Route wiring away from sharp edges, exhaust systems, fuel lines, and areas prone to road debris.

- Use grommets when passing wires through metal surfaces to prevent insulation damage.

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Tools and Materials Required

- Harmar-supplied wiring harness (23 ft. long, compliant with SAE J1128 standards)

- Cable ties and 3/8" grommets (included in the hardware pack)

- Multimeter for voltage testing

- Insulated crimp connectors (if splicing is necessary)

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Step-by-Step Wiring Instructions

1. Prepare the Wiring Harness

- Unwind the harness and lay it flat to avoid tangles.

- Identify the lift-end connector (black plug or 2-pin connector).

2. Connect to the Battery

- Negative Terminal First: Attach the black wire to the battery's negative terminal.

- Positive Terminal Last: Connect the red wire to the positive terminal only after routing the harness.

3. Route the Harness

- Run the harness along the vehicle frame, avoiding heat sources and moving parts.

- For under-vehicle routing, secure excess wire with cable ties and use grommets at entry points.

4. Secure the Lift-End Connector

- Position the connector near the lift's mounting point (trailer hitch or rear cargo area).

- Ensure pins are fully seated and retaining flanges are adjusted to prevent disconnection.

5. Finalize Connections

- Verify all connections are corrosion-free and tight.

- Reconnect the battery and test the lift's operation.

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Troubleshooting Common Issues

Lift Does Not Operate

- Check for loose or corroded battery connections.

- Inspect the wiring harness for damage or pin misalignment.

Intermittent or Slow Operation

- Test voltage at the lift motor during operation (should remain above 11V under load).

- Clean or replace corroded connectors.

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Maintenance Recommendations

- Schedule bi-annual inspections to check for wire corrosion, insulation wear, and connector integrity.

- Lubricate lift mechanisms according to the manufacturer's guidelines.

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Frequently Asked Questions

Q: Can I use an aftermarket wiring harness?

A: No. Harmar's harness is engineered to handle the lift's current draw (up to 20A). Third-party harnesses may overheat.

Q: What if my vehicle has a hybrid/electric battery?

A: Use Harmar's AL205 battery pack to avoid interfering with the vehicle's high-voltage system.

Q: How do I protect the wiring from road debris?

A: Secure the harness with cable ties and route it through the vehicle's interior when possible.

Q: Why does the motor feel warm during use?

A: Poor connections increase resistance, causing heat buildup. Inspect and clean all terminals.

Q: Can I shorten the wiring harness?

A: No. Coil excess wire and secure it-cutting may reduce current capacity.

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SCitations:

[1] https://www.harmar.com/wp-content/uploads/2017/12/999-3B05-AA_HA_AL055-065_IOM_RevB.pdf

[2] https://www.rehabmart.com/pdfs/harmar_lift_manual_al065.pdf

[3] https://www.harmar.com/faq/

[4] https://www.harmar.com/wp-content/uploads/2022/08/999-3B01-AB-F-InsideLifts-IOM_IOM.pdf

[5] https://mymobilitystore.com/wp-content/uploads/2021/01/Installation-and-Service-Manual__Outside-Vehicle-Lifts_Harmar-Mobility-Lifts_My-Mobility-Store.pdf

[6] https://www.harmar.com/wp-content/uploads/2022/07/610-00065_SL_AL350_IOM_RevA.pdf

[7] https://www.youtube.com/watch?v=zNDLbOfIeLU

[8] https://hieline.com/wp-content/uploads/2024/11/Harmar_Lift_Manual_3.pdf

[9] https://www.youtube.com/watch?v=iasEZHR8gfo

[10] https://mymobilitystore.com/wp-content/uploads/2021/01/Owners-Manual_Outside-Vehicle-Lifts_Harmar-Mobility-Lifts_My-Mobility-Store.pdf

[11] https://www.rehabmart.com/pdfs/manual~12.pdf

[12] https://www.ameriglide.com/resources/product/1083/productDocument/581.pdf

[13] https://www.discovermymobility.com/store/scooter-lifts/harmar/al100/Harmar_AL100.pdf

[14] https://www.youtube.com/watch?v=Q5xnii9zj4w

[15] https://www.youtube.com/watch?v=7kkEuTeKR6o

[16] https://corfreedom.com/2024/10/02/wheelchair-and-scooter-lifts-problems-amp-solutions/

[17] https://www.blvd.com/scooter-lifts/fix-a-broken-scooter-lift

[18] https://www.youtube.com/watch?v=FwWx9_RO3Ow

[19] https://www.youtube.com/watch?v=4neBtTXD-_E

[20] https://www.youtube.com/watch?v=tiEUCkWDxaE

[21] https://www.youtube.com/watch?v=TTd_KrIuVbQ

[22] https://www.youtube.com/watch?v=1bGlxKCphMY

[23] http://electropedic.com/Harmar-resi-Manual.pdf

[24] https://www.harmar.com/wp-content/uploads/2022/08/999-3B01-AB-F-InsideLifts-IOM_IOM.pdf

[25] https://www.nsm-seating.com/journal/answering-common-questions-harmar-lifts-part-2/

[26] https://www.harmar.com/resources/

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