OK All. !!. Built it. . not as fancy as that one rich but it works.
I made 5 circuits. . left turn, right turn, lights, back up, and Electric Brakes
First the parts list.
This is a Cannex 5x5x2" Box. It has a seal on the lid.
http://www.westernextralite.com/ind...ds=dept&process=search&qdx=0&text=can 5133706 ... $14
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3 Rolls of 10 Gauge primary wire. .
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a 40 amp Circuit Breaker. Yellow tab is the reset.
http://www.wiringproducts.com/contents/en-us/d262_dc_circuit_breakers.html
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a prewired relay socket. . 5 of these
http://www.wiringproducts.com/contents/en-us/p565.html
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a 50 amp relay. . I bought a 5 pin but should have done a 4. . All I did was clip the center wire short. . 5 Relays
http://www.wiringproducts.com/contents/en-us/p65.html
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This is the "T" connector for our truck. I have a 09 and you search for yours... the 4 wire is not on the protected side so you have to clip and modify this.
http://www.autopartsasap.com/2009-Dodge-Pickup-Ram-Full-Size-T-One-Connector-Assembly-118381.html
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Ok, this next image is looking at the end of the harness with the red clip on top. for what wire is what.
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OK, now, here are the 5 relays connected to the 5 wire sockets. . Red wires are signal wires, white is ground, black is bat. + and green is the load output... I made 2 1/2" holes in the side of the box. . signal, ground and load out one side, power out the other.
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The wires are all soldered and wrapped. . that Scotchlock is a forgotten ground wire. Top side of image is from the harness, tap into the ground, from the 5 white wire. Clip wires one at a time to the relays. . red wire to upper inbound, green wire to lower outbound. as well as the 4 wire plug. . Notice the clipped 4 wire on the top part.
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Loose layout . . power wires not hooked up yet. .
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Finished and wrapped. . I used weatherstrip adhesive to seal off the side holes. So just connect the harness to the truck and string the power wire to the front battery area.
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The side of the power Module has the connection for the battery. Connected it to the Circuit Breaker.
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Edited this. . I have to post pictures in the reply to this. . I tried to do photo gallery. HTML code is off. . grrr.