Installing 7-Way and Wiring for Auxiliary Battery Charging

Question

Question:

Hi, Ford E150 hi top conversion van 2003 I want to charge an auxiliary battery while the van is running. I see relays and fuses for charging a trailer battery while running, but the van only has a four pin connector or I would just tap in there. Where/how do I convert to seven pin and how do I find the lead for the pin that is used for e auxiliary battery? Thank you

asked by: Karl

0

Expert Reply:

For your 2003 Ford E150 hi top conversion van, because you have a 4 way connector, you can use the Adapter 4-Pole to 7-Pole and 4-Pole # 37185. This will connect to your 4-way and then you can simply connect the white ground wire to a bare metal surface and then use # 10-1-1 sold by the foot to connect the black wire on the connector to circuit breaker # 9510 and then to the positive terminal on your vehicle battery. This will get your vehicle ready to send the 12V power.

Then on your trailer side, the pin corresponding to the vehicle side 7-way in the 1 o'clock position will be your 12V power. That wire will also normally be black like # H20046 and will connect directly to the positive terminal on your auxiliary battery. The negative terminal of that auxiliary battery will simply connect to the trailer frame for ground.

This wiring configuration will provide a maintenance charge for that auxiliary battery. For a full charge of a depleted battery you will still need to use a battery charger like # 329-GENIUS5 or a DC to DC charger like # 331-BCDC1225D.

expert reply by: Jason S

0

click to enlarge

Answer 1

You can put a maintenance charge on your trailer battery with the 12 volt accessory circuit of the 7-way. The 1:00 position of your 7-way carries this circuit. You would just need to run a length of 10 gauge wire like part #10-1-1 (sold by the…

view full answer...

Answer 2

You are correct in your description of how to wire in a new auxiliary battery in your enclosed trailer. You will take the 7-Way's 12V power feed and route this to the positive terminal on the auxiliary battery, and you will ground the…

view full answer...

Answer 3

It sounds like the tilt battery is backfeeding onto the breakaway battery charge line so as long as the ground is connecting it is taking a charge from the tilt battery and that is why your charge light is staying on. I have a solution for you, you…

view full answer...

Answer 4

I'm happy to help with that isolator and wiring. I checked your invoice and see you went with the Battery Isolation Solenoid #PK5231201. This is a good choice and will need to be mounted to the frame because it uses the mounting holes for…

view full answer...

Answer 5

The best way to power the interior lights in your trailer is with its own independent battery. You will not want to use the breakaway battery. The breakaway battery is only designed to operate the breakaway and will drain extremely quickly,…

view full answer...

Answer 6

Typically people will let the breakaway battery run the breakaway system and then would use the accessory battery to power the interior lights etc. This tends to work the best since your breakaway battery needs to always be charged and interior…

view full answer...

Answer 7

For your battery isolator similar to #DW08771, you will have connection posts for each battery and for an alternator. The main battery will connect to position one and the alternator to the A post. The second battery will attach to the 2 via a…

view full answer...

Answer 8

The Bargman 7-Way, RV-Style Connector #WG54006-043 referenced in your question uses the standard RV-style pin locations for its 7-Way connector. I have attached a diagram of these locations and their functions for you to check out. Wire colors will…

view full answer...

Answer 9

In order to charge an on-board trailer battery you'd need to have a seven way connection on both the vehicle and trailer, this would contain the necessary circuits to pass a charge from the vehicle battery to the trailer battery. If you…

view full answer...

Answer 10

The only way you could power interior dome lights on a trailer without it being connected to a tow vehicle would be to power the lights with a battery like a breakaway battery. How you choose to wire up the batteries will in the end be up to you,…

view full answer...

Answer 11

For charging a trailer battery you want to go with as thick of wire as you can. 10 gauge would be ideal. We sell 10 gauge wire by the foot with part #10-1-1. Typically a 40 amp breaker like part #9510 is used.

view full answer...

Answer 12

Yes, the battery maintainer you have requires a 12 volt power source coming straight from the battery and the center pin of your 6-way is exactly that so it would work very well for you.

view full answer...