LiftMaster K94-36891 7Ah Battery Wire Harness for LA412
The LiftMaster K94-36891 is a 7Ah battery wire harness used on compatible LA412 solar swing gate operator systems. The harness connects the 7Ah battery to the operator power circuit so the system can charge and draw from the battery correctly during normal solar operation and backup operation. This part is commonly replaced when the battery leads are damaged, terminals are corroded, a connector is loose, or the harness was cut during service. LA412 systems have had different revisions, so old-style and new-style harnesses should not be mixed without checking the parts diagram. Some references identify K94-35225 for older LA412 units, making generation verification important before upload or purchase.
Compatible With
Newer style LiftMaster LA412 / LA412U solar swing gate operator applications using 7Ah batteries. Some references also mention HCTDCUL with this J15 harness, but LA412 is the strongest application in this row. Older LA412 units may use K94-35225 instead.
- LA412
- LA412U
- LA412UL
- LA412PKGU / LA412PKGUL style solar swing gate systems where specified
- Select J15 harness references including HCTDCUL only where the parts diagram confirms K94-36891
Features & Specifications
| Manufacturer | LiftMaster |
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| Product Type | Battery wire harness |
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| Part Number | K94-36891 |
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| Application | 7Ah battery connection |
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| Compatible Operator Type | LA412 linear actuator swing gate operators |
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| Battery Type | 7Ah battery |
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| Related Older Harness | K94-35225 for some older LA412 units |
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| Notes | Confirm old-style vs new-style LA412 before ordering |
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Also Known As / Related Part Numbers
- K94-36891
- 94-36891
- J15 harness
- LIF-K94-36891
- LM-K94-36891
- K94-35225 (older LA412 related harness; verify before substitution)
Technician Note
For LA412 units, confirm whether the operator is the older or newer style. Similar battery harnesses may plug in differently or route differently inside the control box.
Before Ordering
- Match the manufacturer part number on the original component whenever possible.
- Confirm the operator model, model suffix, and generation before ordering.
- Compare connector style, wire count, battery size, enclosure layout, and harness routing where applicable.
- Use the LiftMaster parts diagram as the final fitment reference when model listings conflict.
- Do not bypass monitored safety devices, reset circuits, interlocks, or fault-protection wiring.
Professional Advisory
Gate operator wiring, battery, reset switch, and enclosure repairs should be completed with power disconnected and with the gate secured from unexpected movement. If the operator has high-voltage wiring, damaged insulation, missing safety devices, water intrusion, or repeated fault conditions, have the system inspected by a qualified gate technician before returning it to service.
Product Q&A
Is K94-36891 for LA412 solar operators?
Yes. It is commonly listed as a 7Ah battery harness for select LiftMaster LA412 and LA412U swing gate operators.
What is the difference between K94-36891 and K94-35225?
K94-35225 is referenced for some older LA412 units, while K94-36891 is commonly listed for newer style LA412U applications. Verify by parts diagram.
Can a bad battery harness stop an LA412 from charging?
Yes. A loose, corroded, or damaged harness can interrupt battery charging or backup power operation.
Does this include the battery?
No. This is the wire harness only unless a specific kit listing states otherwise.
Can this be used on LA500 or LA400?
Do not assume so. LA400, LA412, and LA500 battery wiring can differ by model and generation.
