Portable Trailer Light Tester 
Thexton’s Portable Trailer Light Tester utilizes the common mini 12v jumper packs for power supply.This allows no need to purchase a special battery or having another person help check the lights. Has an 8 amp breaker.
Tests-left and right turn signals, taillights, and brake lights.
Can also test electric brakes, reverse lights, and auxiliary lights if combined with THX839 7 blade to 4 flat adapter.
Handheld and lightweight.
Product UPC: 00872100838
Availability: In stock.