Liftmaster K99-ENF-SWITCH, STOPLIGHT SWITCH AND RELAY KIT, ENFORCER
The K99-ENF-SWITCH kit supports the traffic-control side of a LiftMaster Enforcer motorized traffic spike installation. In many commercial entrances, the spike system is paired with red/green stoplights or other external warning devices so drivers know when the lane is safe to enter. This switch and relay kit helps the Enforcer control system communicate the proper status to that signaling equipment.
This is not a simple universal relay. The correct relay function, switch state, and voltage must match the Enforcer wiring diagram. If the light stays red, stays green, fails to change with spike position, or behaves intermittently, the switch, relay, wiring, power source, and traffic light assembly should all be checked before parts are replaced.
Compatible With
This compatibility section is written for supported product families and common model references. Always verify the original part number, operator model, configuration, and parts diagram before ordering.
- LiftMaster Enforcer Model 13100 surface-mount traffic spike systems
- LiftMaster Enforcer Model 13200 in-ground traffic spike systems
- Enforcer 13100XC and 13200XC systems when the wiring diagram calls for K99-ENF-SWITCH
- Enforcer traffic spike installations using external stoplight or traffic-signal control
- 24VDC Enforcer control-board applications that specify this stoplight switch and relay kit
Also Known As / Related Part Numbers
- K99-ENF-SWITCH
- LM-K99-ENF-SWITCH
- ENF-SWITCH
- Stoplight switch and relay kit
- Enforcer traffic light relay kit
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Stoplight switch and relay kit |
| Part Number | K99-ENF-SWITCH |
| Application | Traffic signal interface for Enforcer motorized traffic spike systems |
| Compatible Operator Type | Perimeter access, traffic spike, or barrier gate equipment as noted |
| Primary Compatibility | LiftMaster Enforcer 13100 and 13200 motorized traffic spike systems using compatible 24VDC control circuits and external traffic-light signaling. |
| Notes | Verify by original part number, installation style, and current parts diagram. |
Technician Note
Traffic spike and barrier gate parts often look similar across product families, but small differences in thickness, linkage geometry, tooth section, chain pitch, or mounting pattern can prevent proper operation. Match the part number and installation type before ordering.
Before Ordering
- Confirm the exact manufacturer part number on the existing part or parts diagram.
- Verify the operator model, series, and surface-mount versus in-ground configuration.
- Compare dimensions, section length, plate thickness, linkage style, mounting holes, and related hardware.
- Inspect adjacent parts that may have caused the failure, such as sprockets, chains, pivots, teeth, shafts, bushings, or control wiring.
- Do not order by appearance alone; similar LiftMaster, Elite, Magnetic, Enforcer, and EZ traffic-control parts may not interchange.
Important Ordering Warnings
- Do not bypass traffic lights, alarms, warning signs, or safety devices to keep a lane open.
- Verify relay voltage, switch wiring, and control diagram before ordering.
- Electrical diagnosis on powered access-control equipment should be handled by a qualified gate or access-control technician.
Professional Advisory
This is a specialty perimeter access replacement part. Work on powered traffic spike, barrier, or access-control equipment should be performed with the system locked out and with the correct manual available. Do not bypass safety, traffic-control, or warning devices to keep a system in service.
Product Questions & Answers
What is the K99-ENF-SWITCH used for?
It is used to interface select Enforcer traffic spike systems with stoplight or external traffic-control signaling.
Does this kit control the spike teeth directly?
No. It is a switch and relay kit for signaling functions, not the main spike drive chain or sprocket assembly.
Which systems commonly use this kit?
It is commonly associated with LiftMaster Enforcer 13100 and 13200 systems when the wiring diagram calls for K99-ENF-SWITCH.
Can this relay be replaced with a generic relay?
A generic relay should not be substituted unless voltage, wiring, contact rating, and control function are confirmed against the Enforcer wiring diagram.
What should be checked before replacing this kit?
Check the external light, wiring connections, control-board output, relay voltage, switch condition, and any water or corrosion in the control enclosure.
