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Old 07-15-2010, 01:44 PM   #1
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Trailer Wiring

I need to wire my Jeep up so I can tow a small dirt bike trailer. I have a Rock Hard bumper with a tow rated hitch and frame tie ins, but I'm not wired to plug the trailer in for lights. Can anyone walk me thru what I'll need to buy and how to wire it up? The trailer has the normal 4 pin plug. Thanks!

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Old 07-15-2010, 03:05 PM   #2
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I went to a trailer hitch store and bought the wiring kit for around 25 bucks. You have to go up under each tail light from the wheel well, removing the plastic mud shield and plug into the existing harness. I did this as I tow a Kendon folding motorcycle trailer as well. I will try and find the information for the plug and post it up.

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Old 07-15-2010, 03:09 PM   #3
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Look at etrailer.com and they have a video showing the installation procedure for the Wrangler trailer wiring harness. The part number is 118409.
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Old 07-15-2010, 03:26 PM   #4
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i spliced mine inside near the right roll bar. i just use a extension when i pull the trailor
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Old 07-15-2010, 06:58 PM   #5
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I bought a plug and play harness that just plugs in behind the RR wheelwell.
Although, I've heard some plug in the RL wheelwell and some plug in both wheelwells.
Mines an '04 Unlimited
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Old 07-15-2010, 07:48 PM   #6
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I was debating on if I should try to do this myself or get someone to do it. I am familiar with 12V wiring from when I was younger and also because I have a boat that I have done a lot of wiring and installs on but I wasn't sure how much of a job this would be.

After hearing from you all and watching the video I ordered the hook-up myself. Thanks all!
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Old 07-15-2010, 08:27 PM   #7
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here is a great website that can help you

Trailer hitch, hitches and bike rack (800)298-8924
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Old 07-16-2010, 12:04 AM   #8
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i went to napa auto parts and bought a kit that plugs into harness up under r/r fender liner.took 5 minutes
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Old 07-16-2010, 03:48 AM   #9
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Here is the one I got.... Reese T-connector (click the first one marked "T-connectors")
Weird thing is, when I plug in the info for my Jeep, it shows the plug that connects to the left & right light harness, but I received the one that just plugs into the right side??
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Old 07-16-2010, 03:53 AM   #10
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↑ SWEET AVATAR! haha sorry, didn't want to hijack the thread

And the t connectors rock, no splicing and its a garunteed stable connection
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Old 07-15-2012, 03:35 PM   #11
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Wiring 4 flat trailer connection / harness to Jeep TJ wrangler

I think you guys are all spending way to much $ and making this more difficult and complex than it seems. If you want to wire your Jeep TJ simply (mine is 03) for trailer wiring 4 Flat here is all you need to do and it won't cost you more than $7. I went to walmart and bought a 4flat connection. It was actually a pretty cool one for $7 bucks because it has the LED indicators which are useful because when you get it all hooked up it will light up when each function is in use so you'll know if it works before you ever hook up your trailer. The kit comes with just enough wire to do the job (won't need any extra wiring). Open up your kit. All the wires are coated to stick together....pull them all apart until you get about 6 inches to the actual connection. You do this because you're going to actually run the wires to different places. Next, you want to unscrew the tail light covers (4 screws), then unscrew the tail light housing (3 bolts). pull the housing out. Cut open the wiring hose to expose 3 different wires. The black wire with yellow tracer is your tail/running lights... the violet wire is reverse light (you won't need this) and the brown wire on the driver side is your turn/brake and vice versa for the green wire on the driver side. Fish your Brown and Yellow Trailer kit wires up through the mud cover (underneath your jeep below your Jeep Tail lights) up through the hole where your jeep lights are...now splice them. I used some wire connectors to twist them solid and covered with electrical tape. If you don't know what a wire connector is, just go to your local hardware store and you can probably get a few for pennies. Now I run the green trailer kit wire to the passenger side and do the same steps. The white wire is your ground wire...you just need to drill a hole into your frame and bold the white wire to your frame. Use some zip ties and tie up any loose wire and tuck it in the bumper. This next part sounds a little ghetto, but trust me it is STOUT and Legit! I mounted the trailer connection to my bumper by placing the connection on my bumper like I would like it to look, then drilled a couple holes on each side if it so that I could run a zip tie up through holes in the bumper and cinch it down on the connection. The connection actually has a groove that the zip tie lays down in. This sounds ghetto but trust me it is SOLID and stronger than the factory towing package on my wife's expedition. On hers, I always have to hold the connection because it wiggles just a bit. Mine, it doesn't budge. When all is said and done it looks perfect and nothing is rigged...just some professional splicing that does the same job that you would spend $35 ordering some crazing harness adapter watchamacallit and break your fingers trying to pull the old fused apart connectors apart up in your jeep with little space for your hands. I figured out all of these steps myself and it took me about 2 hours. Now that I've given you the steps it should take you a little under an hour. Mine looks factory and works perfectly for $7!!!
Here is a list of tools / supplies I used.
Trailer 4 flat Kit ($7 at Walmart)
Electrical tape
3 plasctic electrical wire connectors (had laying around)
Drill (had)
Drill bit for metal (had)
Screwdriver
3/8 socket (for the 3 bolts screwing the housing to the jeep...hope this is the right size...I forget)
Wire strippers (had but you can get a way without if you can strip wire)
Bolt (had one in a drawer that fit the hole I drilled for the ground wire)
3 zip ties (had in my tool box)

I hope this helps someone...if it did please let me know!
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Old 07-15-2012, 06:26 PM   #12
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Plug-N-Tow (R) Vehicle Wiring Harness with 4 Pole Trailer Connector Hopkins Custom Fit Vehicle Wiring 42615

Plugs right into one rear taillight plug under the right rear mud flap. Couldn't be any easier. And for another $5 you can get a magnetic mount to attach the trailer plug to your bumper.
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Old 05-07-2013, 06:44 AM   #13
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All you need

Quote:
Originally Posted by jeepsweeps View Post
I think you guys are all spending way to much $ and making this more difficult and complex than it seems. If you want to wire your Jeep TJ simply (mine is 03) for trailer wiring 4 Flat here is all you need to do and it won't cost you more than $7. I went to walmart and bought a 4flat connection. It was actually a pretty cool one for $7 bucks because it has the LED indicators which are useful because when you get it all hooked up it will light up when each function is in use so you'll know if it works before you ever hook up your trailer. The kit comes with just enough wire to do the job (won't need any extra wiring). Open up your kit. All the wires are coated to stick together....pull them all apart until you get about 6 inches to the actual connection. You do this because you're going to actually run the wires to different places. Next, you want to unscrew the tail light covers (4 screws), then unscrew the tail light housing (3 bolts). pull the housing out. Cut open the wiring hose to expose 3 different wires. The black wire with yellow tracer is your tail/running lights... the violet wire is reverse light (you won't need this) and the brown wire on the driver side is your turn/brake and vice versa for the green wire on the driver side. Fish your Brown and Yellow Trailer kit wires up through the mud cover (underneath your jeep below your Jeep Tail lights) up through the hole where your jeep lights are...now splice them. I used some wire connectors to twist them solid and covered with electrical tape. If you don't know what a wire connector is, just go to your local hardware store and you can probably get a few for pennies. Now I run the green trailer kit wire to the passenger side and do the same steps. The white wire is your ground wire...you just need to drill a hole into your frame and bold the white wire to your frame. Use some zip ties and tie up any loose wire and tuck it in the bumper. This next part sounds a little ghetto, but trust me it is STOUT and Legit! I mounted the trailer connection to my bumper by placing the connection on my bumper like I would like it to look, then drilled a couple holes on each side if it so that I could run a zip tie up through holes in the bumper and cinch it down on the connection. The connection actually has a groove that the zip tie lays down in. This sounds ghetto but trust me it is SOLID and stronger than the factory towing package on my wife's expedition. On hers, I always have to hold the connection because it wiggles just a bit. Mine, it doesn't budge. When all is said and done it looks perfect and nothing is rigged...just some professional splicing that does the same job that you would spend $35 ordering some crazing harness adapter watchamacallit and break your fingers trying to pull the old fused apart connectors apart up in your jeep with little space for your hands. I figured out all of these steps myself and it took me about 2 hours. Now that I've given you the steps it should take you a little under an hour. Mine looks factory and works perfectly for $7!!!
Here is a list of tools / supplies I used.
Trailer 4 flat Kit ($7 at Walmart)
Electrical tape
3 plasctic electrical wire connectors (had laying around)
Drill (had)
Drill bit for metal (had)
Screwdriver
3/8 socket (for the 3 bolts screwing the housing to the jeep...hope this is the right size...I forget)
Wire strippers (had but you can get a way without if you can strip wire)
Bolt (had one in a drawer that fit the hole I drilled for the ground wire)
3 zip ties (had in my tool box)

I hope this helps someone...if it did please let me know!
Wired our '99 for trailer lights last night using this info. 7 bucks and 30 minutes. The LED's in the connector are sweet. Thanks for the info. Saved me the time of probing the wires to figure out which ones I needed.
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Old 05-08-2013, 06:51 AM   #14
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Great

Glad it helped someone!
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Old 05-08-2013, 06:52 AM   #15
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Glad it helped someone!

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