2nd Gen Non-Engine/Transmission External 12V. Power

[Majjoe]

I have a 12K lb dump trailer which I pull with my truck. The dump of the trailer is operated by a 12v. hydraulic pump which is powered by a deep cell Marine battery. This pump draws a lot of amps and if the trailer is loaded I can only dump about 5 or 6 loads before the battery is dead. I have the towing package on my truck and I have heard that one of the 7 terminals on the hookup can be used for charging a trailer battery. Does anyone have any information on doing this or should I connect 12v. power directly from another source on my truck. Any information would be appreciated.

 

[Vaughn MacKenzie]

Joe yes you should make a trailer plug to connect to the factory 7-pin plug. This site shows a diagram which terminal it is.



http://www.etrailer.com/faq/wiring.aspx

 

[DennyDay]

Majjoe - - I don't think I would try to support the battery on the trailer from the 7 wire plug. Suggest you run an 1 ga. cable from the front battery to a double plug ar the back of the truck thru a second plug made for high amps (available from big truck supply companies for operating 12v lift gates or use a jumper cable plug mounted. Kit available from Wrangler Supply.



Denny

 

[Majjoe]

Thanks to you and Vaughan I believe I can figure it out. I looked at the etrailer site and it looks like the orange wire (auxilliary) would be the wire I would use to charge the trailer battery regardless of whether I would wire it direct from a battery at the front of the vehicle or do it through the 7-pin connector I already have installed -- we have real bad weather here right now, but when the weather breaks I'll go look at my trailer wiring which is a 7-pin also and see if it has an orange wire. I believe I can rig it up now. Thanks again.



Joe

 

[jelag]

I have a couple of trailers that have dump boxes on them... . I went to welding supply company and bought #2 O welding cable for 1. 60 a ft... ran a cable to the back of the truck and grounded a second cable... I then went to a forklift company and bought 2 battery cable ends... about 15. 00 each... . I soldered the welding cable with eyelets for the ground and battery connection and into the connectors on the quick connects for the cable ends... . one on the trailer and now I can run this to dump or power the pump... .

1 thing that you have to do... is disconnect the 7 pin plug when you run the pump... the current draw will want to blow the fuse under the hood as it draws current to try and charge this battery... ...

We than move this set up from truck to truck as we trade them... I have a car trailer(tilt bed), dump trailer, and winch set up (pull cars up the trailer)(put into receiver for hunting) this way and move them from truck to truck... very handy

You could leave this cable connected as you travel down the road... . I don't. .

Hope this helps. .

 

[JFaughn]

You should put a battery isolator [ allows the batteries of the eng. & dump to charge with out one killing the other ] .
The wire going back to the dump batt. only needs about a 10ga. wire , because it is supplying charging power [ up to 120 amps ] but not for long , with the isolator it will not pull off the start batteries , the hyd. pump pulls [ 200-400 amps ] .

 

[WestTN]

Depending on how frequently you dump, you may need a bigger alternator. The maximum capability of the alternator cannot be used continuously without burning it up.

 

[Majjoe]

I have a couple of trailers that have dump boxes on them... . I went to welding supply company and bought #2 O welding cable for 1. 60 a ft... ran a cable to the back of the truck and grounded a second cable... I then went to a forklift company and bought 2 battery cable ends... about 15. 00 each... . I soldered the welding cable with eyelets for the ground and battery connection and into the connectors on the quick connects for the cable ends... . one on the trailer and now I can run this to dump or power the pump... .

1 thing that you have to do... is disconnect the 7 pin plug when you run the pump... the current draw will want to blow the fuse under the hood as it draws current to try and charge this battery... ...

We than move this set up from truck to truck as we trade them... I have a car trailer(tilt bed), dump trailer, and winch set up (pull cars up the trailer)(put into receiver for hunting) this way and move them from truck to truck... very handy

You could leave this cable connected as you travel down the road... . I don't. .

Hope this helps. .

Jim:



Thanks for the info -- I like your idea. Did you run two cables, one from the positive side of each battery and another cable for a ground or did you just run one positive cable?



I like your city -- several years ago I spent several weeks in Spokane on business (Military Officers Association Annual Meeting).

 

[SFrey]

check out www.andersonpower.com theyt have very heavy duty disconnects



scot

 

[jelag]

One cable goes to the positive term of the battery... the other grounds to the frame in the rear... . I pulled a bumper mount bolt.....

I also have a set of jumper cables set up this way..... you can pull up to a car... on the highway... you just back up to it... snap on the cables and power them up... .

Very handy set up... .