Parts Needed to Charge a Trailer Battery for a Winch
Question:
I purchased a deep cycle marine battery to power my winch. I want to connect it to the accessory pin on my 7pin connector. Questions are: Should I put an inline fuse between the 7pin connector and the trailer mounted winch battery? If so, what size would you recommend? Next question is: Would the trucks 12 volt charging system charge the deep cycle battery adequately? Thanks,
asked by: Kirk
Expert Reply:
First, the wiring on a trailer connector can provide a maintenance charge to a 12 volt battery on a trailer but it will not be able to fully charge it. The 12 volt circuit on a 7-Way is already circuit protected so a separate fuse or breaker should not be needed.
There is a way you can provide a charge to the battery from the truck. You would need to equip the truck and trailer with separate single pole connectors independent of the 7-Way. For the trailer side, you would need Pollak Single-Pole, Round Pin Trailer Wiring Connector, # PK11852. It accepts heavy gauge 00 wire (like battery cable). The trailer battery would also need to be grounded to the vehicle frame.
On the truck side, you would use Pollak Single-Pole, Round Pin Trailer Wiring Socket, # PK11851. This connector also accepts 00 gauge wire. On the truck side, you would want to route the wire from the connector to the front of the vehicle and into the engine compartment near the battery. You would then need to mount a battery isolator, # PK5231201, near the battery.
Connect the positive side of the battery to one of the side polls on the isolator. Connect the isolator center pole to a 12 volt ignition source ( a source that is only on when the vehicle key and/or engine is turned on). The last post will first go to a 40 amp circuit breaker, # PK54540, to the post labeled BAT. The circuit breaker will also need to be mounted to a metal surface like the isolator. Then from the AUX post on the circuit breaker, connect the wire you ran up from the single pole.
The battery isolator will allow the vehicles system to charge the trailer battery when the truck is running, but cuts off the feed with the truck off so the vehicle battery will not get drained.
The other option is to attach the trailer battery to the 12 volt circuit on the 7-Way to provide the maintenance charge, but then use a battery charger, # CTEK56353, to charge the battery fully. I have included a link to a video of the charger for you.
Products Referenced in This Question
CTEK MULTI US 7002 12-Volt Universal Battery Charger w/ Pulse Maintenance and Backup Power
- Battery Charger
- Battery Charger
- Car/Truck/SUV
- Motorcycle
- Trailer
- Lawn Mower
- Jet Ski
- 150 Ah
- Charges/Maintains
- 12V
- Wall Outlet to Vehicle Battery
- CTEK Power Inc
more information >
Pollak Single-Pole, Round Pin Trailer Wiring Socket - Vehicle End
- Trailer Wiring
- Trailer Connectors
- Vehicle End Connector
- Plug Only
- 1 Round
- Pollak
more information >
Pollak Single-Pole, Round Pin Trailer Wiring Connector - Trailer End
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- Plug Only
- 1 Round
- Pollak
more information >
Pollak Circuit Breaker - Cycling/Automatic Reset - 40 Amp - Straight Mount Bracket
- Accessories and Parts
- Wiring
- Circuit Breaker
- 40 Amp
- Pollak
more information >
Product Page this Question was Asked From
Starter Solenoid - SPST - 12 Volt - 100 Amp - Continuous Duty - Grounded
- Accessories and Parts
- Battery Boxes
- Switches and Solenoids
- 100 Amp
- Pollak
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: CTEK MULTI US 7002 12-Volt Universal Battery Charger w/ Pulse Maintenance and Backup Power
- Shop: Pollak Single-Pole, Round Pin Trailer Wiring Connector - Trailer End
- Video: Review of MAXXAIR RV Vents and Fans - Replacement Lid MaxxFan, MaxxFan Plus Roof Vent - MA10A40009K
- Shop: MaxxAir II RV and Trailer Roof Vent Cover w/ EZClip - Black
- Shop: Replacement Lid for MaxxFan and MaxxFan Plus Roof Vents - Smoke
- Shop: MaxxAir FanMate RV and Trailer Roof Vent Cover - 25" x 18-1/8" x 10-1/4" - Black
- Article: How to Charge a Trailer Battery While Driving: 3 Common Problems (And How to Fix Them)
- Search Results: trailer winch
- Q&A: How to Charge a Trailer Battery Through a 7-Way Connector
- Shop: Bright Way Switch Mode Battery Charger for Hydraulic Lift and Dump Trailers - 12V - 5 Ah
- Shop: Pollak Single-Pole, Round Pin Trailer Wiring Socket - Vehicle End
- Article: Trailer Wiring Diagrams
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Search Results: electric trailer winch
- Search Results: trailer jack
- Q&A: Recommended Battery for a 12,000 Lb. Electric Car Trailer Winch
- Search Results: electric jack
- Search Results: electric trailer jack
- Q&A: Powering Trailer Mounted Winch from 7-Way Trailer Connector
- Search Results: aluminum tongue box
- Search Results: bow roller
- Article: Trailer Tire Sizing
- Shop: Trailer Wiring
- Video: Bulldog Winch Electric Winch BDW20207 Review
- Video: Review of etrailer Trailer Door Parts - Stick On Rubber Hollow Bulb Seal 25 Foot - CS32FR
- Shop: Gooseneck Hitch
- Video: Pollak 50 Amp Metal Circuit Breaker Review
- Q&A: Should a Circuit Breaker Be Installed In-line with Tow Ready Battery Isolator Solenoid
- Q&A: Installing Battery Isolation Solenoid For Trailer Battery In 2001 Dodge RAM 2500
- Video: Redarc In-Vehicle DC to DC Battery Charger Installation
on Accessories and Parts
