How To Charge Trailer Battery On Dump Trailer Using The 7-Way Trailer Connector

Updated 09/27/2010 | Published 09/26/2010

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10 Gauge Wire - Blue Primary - Per Foot

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Question:

how can i get my dump trailer battery to charge off of my tow vehicle? as of now there is no wires going from 7 wire 6/14-1/12 cable in trailer to battery.

asked by: J.R.M.

Expert Reply:

You will want to use a circuit tester like part # PTW2993 and check the # 4 terminal on the back of the 7-way trailer connector on your trailer for power. This is the 12-volt power terminal so there should be power to that terminal.

You will need to run a 10-gauge power wire like the, # 10-1-1, from the # 4 terminal (12 volt) on the 7-way trailer connector on the trailer to the positive terminal on the trailer battery. This will allow you to maintain a charge on your trailer battery, it will not charge the battery from a discharged state.

To be able to fully charge the trailer battery from a discharged state you would have to use the NOCO Genius # 329-GENIUS5. This charger can be used to fully charge the battery and then you can maintain that charge with the vehicles charging system.

I am sending a link to a picture of the 7-way trailer connector that will show the 12-volt power terminal.

expert reply by: Jeff D