CHIL1216 - 4 Prong Flat Plug Trailer Light Diagnostic Tester. Test Left, Right, Tail and Brake Lights. CHIL1216 - 4-Way Trailer Light Diagnostic Tester. Tester will test for Left, Right, Tail, and Brake Lights for proper function.
4 Way Trailer Light Tester Circuit Functions Brake signal Trailer Plug Tester
Cal-Hawk 7-Way Trailer Light Tester - 6 Function LED Indicators, CZTLT7
4 Way Flat Plugs Trailer Light Circuit Tester Test Left Right Tail Brake Lights
Ultra-Tow Trailer Light Tester, For 4-Way Flat, Model# DBP
7 Way Blade & 4 Pin Trailer Light Circuit Tester w/LED Indicators Light Tester
