Plug the tester into the trailer plug socket and activate the lights, brakes and turn signals; this will identify if the failure is in the truck, cable or trailer.
Quickly and accurately test vehicle Systems.
Provides an easy-to-connect ground terminal for easy trial light set up.
WARNING: This product can expose you to chemicals including Lead which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.