Which Terminal On a Trailer Connector is Used to Maintain a Charge on the Trailer Battery
Updated 11/23/2011 | Published 11/22/2011
Question:
What pin do I test for keeping battery charged from truck to trailer??
asked by: Steven P
Expert Reply:
If you have a 6-Way connector, the center pin is the 12 volt power and is usually the pin that would be used for charging a trailer battery.
If you have a 7-Way connector, the #4 terminal at the 1 oclock position is the 12 volt power terminal that would be used for charging. I am including a link to a FAQ page on wiring that will show the connectors and the functions of each terminal.
When your trailer battery is connected to either of these terminals it will allow you to maintain a charge on your trailer battery, it will not charge the battery from a discharged state.
You will want to make sure to unplug the trailer when the vehicle is not running to avoid discharging the battery on your truck, or you can install the Tow Ready Battery Isolation Solenoid, part # PK5231201. This solenoid will need to be installed in-line with the 12 volt power wire and a lead ran to a circuit that will only be hot when the ignition is turned on. This will keep the battery from pulling a charge unless the vehicles ignition is on.
Product Page this Question was Asked From
Starter Solenoid - SPST - 12 Volt - 100 Amp - Continuous Duty - Grounded
- Accessories and Parts
- Battery
- Switches and Solenoids
- 100 Amp
- Pollak
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Gooseneck Hitch
- Q&A: Which Gooseneck Hitch Ball For 2018 Chevrolet Silverado 3500 DRW W/ Oem Prep Package
- Video: Curt Ball and Safety Chain Loop Kit Review
- Video: An In-Depth Look at the MORryde Motorized Cord Storage Reel for 30' Long Power Cords
- Video: Review of CURT Trailer Hitch Ball - Gooseneck Hitch Ball - C60629
- Video: Curt Ball and Safety Chain Loop Kit Installation - 2022 Ford F-250 Super Duty
- Search Results: trailer ball
- Search Results: 50 amp cord reel
- Article: Trailer Wiring Diagrams
- Shop: Trailer Hitch
- Shop: Curt Ball and Safety Chain Loop Kit for Chevy, Ford, GMC, and Nissan Underbed Gooseneck Hitch - 38K
- Shop: Curt Pop-In Ball for Factory Chevy/GM, Ford, and Nissan Underbed Gooseneck Hitches - 2-5/16"
- Shop: MORryde Motorized Cord Storage Reel for 30' Long Power Cords - 14-1/8" Tall
- Shop: MORryde Hidden RV Slide Out Storage Tray - 22" x 32" - 70 Percent Extension - 25 lbs
- Search Results: drawer slides
- Search Results: drawer rails
- Shop: Universal RV Drawer Slide Kit - 22" Long Track
- Search Results: trailer hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Shop: Trailer Wiring
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Search Results: trailer wiring
- Q&A: What Is An OEM Prep Package And How Do I Know If I Have It
- Article: How to Measure for Trailer Hitch Drop
- Search Results: trailer tires and wheels
- Video: Curt T-Connector Vehicle Wiring Harness Review C56040
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Shop: Suspension Enhancement
on Accessories and Parts
