Wiring

Wiring

Postby Wolphin [OP] » March 23rd 2008, 3:45am

I am working to setup a 7-pin power connector, but I can't find where to get the brake line or accessory 12V, or what gauge of wire I need for it. I have the 6-wire harness wired to a 4-wire connector, but I need to get the rest of the wires run.

I also don't know what the difference between the 12V and Auxiliary lines are, that are on the 7-wire connector.

Do trailers not have backup lights? How about the "High Centre Taillight" wire in the harness?
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Re: Wiring

Postby Jesse-James » March 30th 2008, 12:12am

Are you running a brake controller? if not just use a pigtail adapter if you need a 7 pin for your trailer.
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Re: Wiring

Postby Wolphin [OP] » March 30th 2008, 1:24am

Well, I want to have the full wiring, not just a partial one, as I want the capability of using it without having to re-wire it in the future, or worse.....
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Re: Wiring

Postby Jesse-James » March 30th 2008, 6:40pm

Gotcha. Here ya go.....

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Re: Wiring

Postby Wolphin [OP] » March 30th 2008, 9:11pm

Thanks! :goodpost: I had the diagram, I just didn't know that the centre auxiliary wire is typically wired to the backup wire. I have that wire at the back, so that one is easy to connect.

The biggest thing that I still need answered: Where do I connect the wire for the electric brake line? :banghead: I can't find the details for that wire anywhere!
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Re: Wiring

Postby Wolphin [OP] » March 30th 2008, 9:39pm

Nevermind... Found the details! http://www.etrailer.com/faq_brakecontroller.aspx
Basically, you tap the brake switch (that is on the back of the brake petal), to a brake controller unit (that I need to still get), Power and ground to it, and wire the output to the electric brake wire!

Now I just have the get the hitch mounted, and the additional wires run....
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Re: Wiring

Postby Jesse-James » March 31st 2008, 2:53am

If you haven't bought your controller yet Prodigy is money well spent. I won't buy anything else.

This is the one I have in my Astro.

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Re: Wiring

Postby Wolphin [OP] » March 31st 2008, 3:24am

Hmm, that's exactly what I was looking at ;)
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Re: Wiring

Postby PPerson » July 29th 2008, 11:50pm

I have a 2002 Astro AWD that came with the towing package. I'm looking to mount a 7-pin RV connector and be able to use my 16' landscape trailer with electric brakes. I've located the wiring harness in the back right compartment. As I peel back the tape covering the wires more are exposed to view. Using the previously posted chart I can figure out this end of the project. How simple is the hookup under the dash? Is there a place to just plug in a harness that then plugs into the brake controller or do I start from scratch, slicing into existing wiring?
Thanks,
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Re: Wiring

Postby gtkane » July 30th 2008, 3:12am

Under the dash, you'll have to splice into the wire from the brake switch for a signal.
You'll also need a ground,12+ power, and a power out wire for the brakes.
No plug-n-play here.
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Re: Wiring

Postby PPerson » August 4th 2008, 5:33pm

OK, I contorted myself in under the dash and see the harness coming off the brake pedal arm. I'm assuming only one of the wires gets spliced into. By the way I think I'll remove the drivers seat to do the work.
or....
I may just "pay the man".
Thanks,
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Re: Wiring

Postby MVMan » August 9th 2010, 11:47pm

I am trying to install the brake controller and can not find the Blue wire & the orange wire under the driver side floor mat as per the owners manual. The wires are in the harness at the jack area, but I can not find them in front. Also having problem seeing/locating the brake light switch. Would very much like any help from anyone that has found them under mat.
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Re: Wiring

Postby MVMan » September 19th 2010, 3:38am

Wolphin

You need to run three wires from under the hood to the 6/7 wire4 socket. You should use 10 gauge stranded or a min. of 12 gauge stranded. Connect the "AUX" wire to the A or B terminal or to the Hot side of the battery, use a 30 amp auto reset breaker or in line fuse. Connect the ground to the battery ground, I know you can get it in back, but when you add trailer brakes you will want a better ground. As for the last wire, it will be for the Brake on the trailer, will run from brake controller to 6/7 wire socket. Just a note a low cost way to get the wire and only have to run "one" line is to purchase a 10-3 extension cord at Lowe's or Home Depot and remove the plug. Run the cord front to rear leaving extra for easy reach to wire it up. The main thing when you use this method is to write which color heavy wire is which so you do not cross wire anything. Good Luck!
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Re: Wiring

Postby astroturf » September 19th 2010, 4:14am

MVMan wrote:Wolphin

You need to run three wires from under the hood to the 6/7 wire4 socket. You should use 10 gauge stranded or a min. of 12 gauge stranded. Connect the "AUX" wire to the A or B terminal or to the Hot side of the battery, use a 30 amp auto reset breaker or in line fuse. Connect the ground to the battery ground, I know you can get it in back, but when you add trailer brakes you will want a better ground. As for the last wire, it will be for the Brake on the trailer, will run from brake controller to 6/7 wire socket. Just a note a low cost way to get the wire and only have to run "one" line is to purchase a 10-3 extension cord at Lowe's or Home Depot and remove the plug. Run the cord front to rear leaving extra for easy reach to wire it up. The main thing when you use this method is to write which color heavy wire is which so you do not cross wire anything. Good Luck!


Great Tip on the extension cord MVMan.

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Re: Wiring

Postby David78212 » June 9th 2012, 1:22am

I just ran the brakes controller wires for mine. Run a sheilded 10ga x 2 wires inside the frame rail almost the entire length of the van... nice and protected... You can buy the whole setup from eTrailer for about $58 and comes with everything you need to run the controller wiring for the trailer. Has 7 + 4 pin plugs and a 10, 20 and 30 amp auto reset breaker. I used a wire fish to run the wires in the frame rail, worked sweet... I then ran the wires needed for inside the cab through the parking brake grommet in the firewall... worked very nice, and I didn't have to make a new hole to run wires.

My install used the white wire on the brake pedal for the signal wire, everything else was pretty easy to figure out. I used the Prodigy P2 controller... No need for the big bucks P3, plus the P2 has the "slide switch" on the bottom to "test" the trailer brakes... the P3 has a button you push many times to do the same thing. The biggest difference between the P2 and P3 is electric to hydraulic controls which I do not need and the number of electric brakes / axles it will control. Since I have no plans on towing a 8 axle trailer with hydraulic brakes, I could not justify spending $80 plus dollars more for the P3 over the P2... Almost all the other features are identical.
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Re: Wiring

Postby Big_kid » June 10th 2012, 5:31am

I had run a few extra wires when I replaced my carpet a few years ago, I used those. I wasn't able to figure out which wire I needed to tap into for the brake switch, but I did notice there was a hole for a second brake light switch. I stopped by a FLAPS, and $5 later had a separate switch dedicated solely to stopping my camper.
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Re: Wiring

Postby SandpointSafari99 » October 21st 2015, 10:42pm

OK I've got most of these labeled using the test light. I have 3 unknown. Blue (I believe is for trailer brakes) orange per convention should be 12v power ?? Where does it go so I can get power to it? And bright green ( I have no idea. Please advise and correct me if needed.
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Re: Wiring

Postby AstroWill » October 21st 2015, 11:29pm

Orange is battery other end is under carpet near interior fuse box.
Dark blue for brake controller.
Lt. Green is reverse lights.

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Re: Wiring

Postby SandpointSafari99 » October 23rd 2015, 4:24am

Thanks for the info.
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Re: Wiring

Postby SandpointSafari99 » October 23rd 2015, 4:52am

OK now why is there a second white ? I found it was brake lights( I marked it as STOP). What would you use that for?
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