Why Does New GM Truck Trailer Wiring Not Work Great with Circuit Tester
Published 11/01/2023
Question:
Why do the 7 way testers not work on new chevy gmc trucks. All the lights just blink on the tester but the wiring is good because the lights on the trailers work.
asked by: Frank C
0
Expert Reply:
New GM trucks don't have consistent 12 volts on their trailer wiring circuits. While this tends to not be a problem for trailer lighting it does not always work great with more sophisticated circuits like your tester. This is a big issue for camera systems that use the running light circuit for their power supply.
expert reply by:
Jameson C
0
Continue Researching
- Q&A: Recommended 7-Way Tester that is Compatible w/ Ram Factory Brake Controllers
- Search Results: trailer wiring tester
- Search Results: 5/8 inch receiver locks
- Shop: Towing Mirrors
- Shop: BOLT brand vehicle and hitch locks
- Shop: Curt Trailer Hitch Receiver Lock - 2" and 2-1/2" Hitches - Stainless Steel
- Shop: K-Source Snap & Zap Custom Towing Mirrors - Snap On - Driver and Passenger Side
- Shop: Reese Trailer Connector Adapter w/ LED Circuit Tester and Dust Cover - 7-Pole to 4-Pole or 5-Pole
- Shop: etrailer Trailer Hitch Receiver Lock for 2" Hitch - Flush - 2-5/8" Span - Stainless Steel
- Shop: Tekonsha 7-Way, RV-Style Tester for Brake Controllers - LED Test Lights
- Shop: Clevis Adapter for B&W Tow & Stow 2" Ball Mounts - 10,000 lbs
- Shop: Pollak 7-Way to 12 Volt Power Outlet Adapter
- Video: Pollak 7-Way to RV Socket LED Circuit Tester Spec Review
- Video: Camco Vinyl Spare Tire Cover Feature Review
- Q&A: Trailer Lights Left Side Turn Signal and Brake Lights Not Working
- Q&A: Troubleshooting Right Side Turn Signal Not Working On Trailer
- Q&A: Troubleshooting Trailer Running Light Circuit Fuse that Has No Voltage
- Video: A Closer Look at the Hook Probe Circuit Tester