Semi-Trailer Light Tester Box (Powered by Milwaukee M12 Battery)

This custom-built tester box runs on a Milwaukee M12 drill battery (battery not included) and uses an inline fuse for circuit protection. The system distributes power through six independent switches, allowing you to test each lighting function individually.

Features:

• ✅ Left Turn Signal – Flashes when switch is on
• ✅ Right Turn Signal – Flashes when switch is on
• ✅ Brake Lights
• ✅ Running Lights
• ✅ Clearance Lights
• ✅ Auxiliary / ABS Power

Specifications:

• Inline fuse for safety
• Runs on Milwaukee M12 12V battery (not included)
• Compact, portable design for quick trailer testing
• Pre-tested to ensure full functionality

Condition:
Fully tested and working as intended. Perfect for shops, mobile techs, or anyone needing a reliable trailer light tester.

If you have any questions, please don’t hesitate to message me — I’ll be happy to help!