Tests both 4 & 5 pin vehicle side connections for faulty wiring. LEDs light up to corresponding circuit. If LED does not light up, the circuit is not receiving power. Double sided unit allows the user to plug in-line with the trailer.
- Tests vehicle circuits on 4 pin connections - quickly identifies faulty circuits.
- Tests vehicle circuits on 5 pin connections - quickly identifies faulty circuits.
- Plugs in-line with trailer - leave plugged in while on the road.
- Uses LED'S, hard ABS.
- Plastic - durability for long life.
- 1 year limited Warranty.
Innovative Products of America IPA 7866 4 & 5 Pin Vehicle Trailer Harness Tester 
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