mrfishaholic
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Ok, I have searched this forum through and through, and could not find clear guidance doing a search, so I am going to post what I ended up finding out.
I have an M105A2 Trailer that I purchased through gov liq. I wanted to drop the height to normal 3/4 ton truck height, and have electric brakes, (retaining 2.5 tons of cargo capacity if desired) I went with a dexter 7K axle.
I removed landing gear, pintle, and installed a manual crank jack where the landing gear used to be. I dropped all the springs and the axle, (easy as they are bolted to the frame)
For wiring, I wanted to be able to tow it with 4 pin connector or the 7 pin with electric brakes.
I ended up just wiring the 7 pin and calling it good, however, Here are the instructions for each:
4 Pin Flat connector:
Trailer Red with White stripe wire is Left Turn and brake light
Trailer Black with white stripe wire is Right Turn and brake light
Trailer Ground (common) is Black with Red Stripe
Trailer Tail Lights are Red with Black Stripe
7 Pin connector this is what I did
Red/black stripe, Tail Lights
Red/white stripe, Left Turn Signal
Black/red stripe, Ground
Black/green stripe, Electric brakes (correlates to the lowest (blackout drive)
Black/White stripe, Right Turn signal
Solid Black, 12v +
Aux I did not hook up.
You will need to replace the light bulbs with 1156 (turn, brake), 67 (tail) Turn and brake is the 2nd socket from the top or the bottom of the top compartment in the light fixture housing. Tail light is the top socket in the light fixture.
Now it only took me about 10 minutes to hook up the lights with the 4 pin flat to get it home, I just cut off the military plug and stripped back the black tubing to expose the black and red wires underneath. It took me about another 5 mins to change out the bulbs. Figuring out which was the common ground and tracing all the wires really didnt take me but 5 minutes. So hopefully this will shed some light on the reality of what the lighting 24v to 12v 4 or 7 pin connection is all about.
I will post photos of my M105A2 shortly, I need to hook up the electric brakes still, and since I am headed out on a TDY mission for a month, it will likely be the end of January before I post the rest of the story as to how to hook up the electric trailer brakes, and how I end up running the wires. I plan to use only the wires on the trailer, as the wirirng is in great shape on the trailer I purcahsed (MFG 1993).
Anyway, my trailer is the same height as my truck is now, and I love it. Perfect for hunting, camping, hauling my quad, or loading 2 cords of wood in. The electric trailer brakes were a great addition to the trailer, also allowing me to keep the weight carrying capacity of the trailer. I can load over 5K into the trailer legally, and within the weight rating for my axle, and the tires. (actually more than what the original setup was rated for). I dont have anything that heavy to load, however, If I wanted to I could do it safely. I also have a coupler at the front where I can switch between a pintle and a 2 5/16" ball. very convenient based upon on road and off road applications......
I have an M105A2 Trailer that I purchased through gov liq. I wanted to drop the height to normal 3/4 ton truck height, and have electric brakes, (retaining 2.5 tons of cargo capacity if desired) I went with a dexter 7K axle.
I removed landing gear, pintle, and installed a manual crank jack where the landing gear used to be. I dropped all the springs and the axle, (easy as they are bolted to the frame)
For wiring, I wanted to be able to tow it with 4 pin connector or the 7 pin with electric brakes.
I ended up just wiring the 7 pin and calling it good, however, Here are the instructions for each:
4 Pin Flat connector:
Trailer Red with White stripe wire is Left Turn and brake light
Trailer Black with white stripe wire is Right Turn and brake light
Trailer Ground (common) is Black with Red Stripe
Trailer Tail Lights are Red with Black Stripe
7 Pin connector this is what I did
Red/black stripe, Tail Lights
Red/white stripe, Left Turn Signal
Black/red stripe, Ground
Black/green stripe, Electric brakes (correlates to the lowest (blackout drive)
Black/White stripe, Right Turn signal
Solid Black, 12v +
Aux I did not hook up.
You will need to replace the light bulbs with 1156 (turn, brake), 67 (tail) Turn and brake is the 2nd socket from the top or the bottom of the top compartment in the light fixture housing. Tail light is the top socket in the light fixture.
Now it only took me about 10 minutes to hook up the lights with the 4 pin flat to get it home, I just cut off the military plug and stripped back the black tubing to expose the black and red wires underneath. It took me about another 5 mins to change out the bulbs. Figuring out which was the common ground and tracing all the wires really didnt take me but 5 minutes. So hopefully this will shed some light on the reality of what the lighting 24v to 12v 4 or 7 pin connection is all about.
I will post photos of my M105A2 shortly, I need to hook up the electric brakes still, and since I am headed out on a TDY mission for a month, it will likely be the end of January before I post the rest of the story as to how to hook up the electric trailer brakes, and how I end up running the wires. I plan to use only the wires on the trailer, as the wirirng is in great shape on the trailer I purcahsed (MFG 1993).
Anyway, my trailer is the same height as my truck is now, and I love it. Perfect for hunting, camping, hauling my quad, or loading 2 cords of wood in. The electric trailer brakes were a great addition to the trailer, also allowing me to keep the weight carrying capacity of the trailer. I can load over 5K into the trailer legally, and within the weight rating for my axle, and the tires. (actually more than what the original setup was rated for). I dont have anything that heavy to load, however, If I wanted to I could do it safely. I also have a coupler at the front where I can switch between a pintle and a 2 5/16" ball. very convenient based upon on road and off road applications......
