The 4 & 5 pin Side Circuit Tester easily traces each lighting function to the terminal in question.
Each LED light corresponds to the circuit being energized
Provides an easy to connect ground terminal for trailer lighting set-up.
WARNING: This product can expose you to chemicals including DI(2-ETHYLHEXYL)PHTHALATE (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.