Plug into the trailer plug socket and activate the lights, brakes, turn signals, etc.
Watch the LEDs, they indicate that each circuit is complete and current is getting to the plug.
Deoxit® Cleaner, 2ml
Contact cleaner & restorer
Prevents electrical failure
Improves performance
Removes oxidation & corrosion
Safe on all plastics.
WARNING: This product can expose you to chemicals including LEAD AND LEAD COMPOUNDS, 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.