Testing a Vehicle Side 7-Way Trailer Connector for Proper Function
Updated 10/12/2011 | Published 10/11/2011
Question:
How is checking a trailer connector done, specifically, and what tools are needed? I have a probe/clip/light tester circuit and a voltage tester with the black/red probes, and box with a dial on the side and a knob with different settings on the front. Will either of these items work?
asked by: Carol
Expert Reply:
To check the pins on the vehicle side 7-Way, you can use a circuit tester or the volt meter. The circuit tester will show you if a signal is coming through on the pin you are testing while the volt meter will tell you that and how much voltage is being sent. When you test the brake circuit pin on the 7-Way, it may be more beneficial to see how much voltage it is sending through.
If you are facing the 7-Way, using either tester, you will test for the proper signal as follows:
1 oclock position = 12 volt hot lead
3 oclock position = right turn/brake light
5 oclock position = brake controller output
7 oclock position = ground
9 oclock position = left turn/brake light
11 oclock position = tail and running lights
Center = reverse lights
You will need to have someone sit in the truck and run through each function while you test the pins. In order to determine the configuration on the trailer side, you will have to trace the wiring back from each pin. You an use the wiring diagrams I have linked for you.
While checking the connectors if you notice any corrosion build up or dirt inside or or in back of either connector, clean it out. A wire brush like a battery terminal brush works well.
You can also check the adjustment on the brakes to make sure they are not adjusted too tight. There is a a little wheel with teeth in it at the bottom back side of each assembly. Using a flathead screwdriver you can turn the wheel to adjust the brakes. I have included a link to a video that features our installer adjusting the brakes. Go to the 4 minute, 55 second mark.
Product Page this Question was Asked From
Dexter Electric Trailer Brake Assembly - 12" - Right Hand - 6,000 lbs
- Accessories and Parts
- Trailer Brakes
- Electric Drum Brakes
- RH
- 6000 lbs
- Brake Assembly
- Manual Adjust
- 12 x 2 Inch Drum
- Dexter
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Brake Controller
- Shop: Trailer Wiring
- Search Results: valterra
- Search Results: brake controller
- Search Results: 2 5/16 hitch
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Search Results: keyless entry latch rv door locks
- Article: Trailer Wiring Diagrams
- Search Results: pd4135kw2bv
- Search Results: backup camera
- Shop: Vehicle Tow Bar Brake System
- Shop: etrailer Electric Trailer Brakes - Self-Adjusting - 12" - Left/Right Hand - 5.2K to 7K
- Shop: Suspension Enhancement
- Search Results: prodigy p3
- Shop: Replacement Seals and Hardware for 3" Valterra Waste Valves
- Shop: Valterra RV Waste Valve Seals - 2" - Qty 2
- Shop: MaxxFan Deluxe Roof Vent w/ 12V Fan, Thermostat, and Remote - Powered Lift - 10 Speed - Smoke
- Shop: Towing Mirrors
- Q&A: Recommended SAE Wired 7 way Trailer Plug
- Shop: Fifth Wheel Hitch
- Shop: Trailer Hitch
- Shop: AquaFresh Drinking Water Hose for RVs - 35' Long x 5/8" Diameter - Blue Vinyl
- Shop: Bearing Kit, 15123/25580 Bearings, GS-2125DL Seal
- Video: A Closer Look at the Curt RVi Series 4 Portable Flat Tow Brake System
- Video: Review of CURT Replacement Command Center Tablet RVibrake - C57DQ
- Shop: Replacement Water Valve for Thetford Aqua-Magic Style II RV Toilet - Restores Flush Power - Qty 1
- Video: Set up: K-Source Universal Dual Lens Towing Mirrors on a 2020 Jeep Cherokee
- Video: 2018 Jeep Cherokee CIPA Universal Fit Dual-View Towing Mirror: Complete Installation
- Video: Review of CURT Flat Tow Brake System - Brake Systems - RVI44FR
- Q&A: Recommended Proportional Trailer Brake Controller for Use with Fleet Trailers with EOH Actuators
on Accessories and Parts
