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View Full Version : Blue Ox basplate install, Tow wiring ideas


SpudRacer
03-23-2007, 10:20 AM
The Blue Ox base plate (http://www.rvupgradestore.com/index.asp?PageAction=VIEWPROD&ProdID=198) seems a stong solid design, and the included hardware and directions are first rate and very easy to follow. I take my time with everything, and it took me about 3 hours to install.

Begin by taking off the front plastic splash shield as per instructions. This is held on with plastic push in/screw in phillips screws. If you turn them while applying minimal pressure against the screw, most of them back out ok. If you push the screwdriver firmly against the screw, they'll just spin.

Once the shield is off, you have to remove the front bumper. This is also very straight forward, no tricks, just follow the directions. Once loose, you have to carefully PULL the fog light harness retainers off the back of the bumper. I do not recommend doing this if it is less than 50 degrees. I fear if the plastic it too cold (ie brittle) they may break. Mine all came out fine.

Next use a sawsall to cut off the ends of the metal framing as per instructions. My only suggestion is to apply 3-4 layers of masking tape in any areas that the blade may rub against while cutting to avoid marring the paint. Once both ends were cut, I used 240 grit sandpaper to smooth the edges, then used Eastwood's Underhood black spray paint to spray the cut ends. It looks factory cut when you're done.

Then you bolt on the baseplate which is also very straight forward. If yours turns out like mine, you;ll find that you scratch the freshly applied pain when forcing it into place. Cutting more metal would help avoid contact, but very hard to get a straight clean cut because you'd have to cut from the bottom, not the top.

DON'T FORGET RED LOCKTITE ON ALL MOUNTING BOLTS!!!

Once that's done, reinstall the front bumper. You can leave the plastic splash guard off, or you'll have to cut two grooves in it to reinstall it. I reinstalled mine, and all I can say is to go very slowly cutting the grooves to make it fit. Once you cut, you can't erase it if you cut in the wrong direction. I cut about 3/16" wide for the groove, and it looks terrific. GO SLOWLY, and test fit frequently to make sure the grooves line up well.

Once that is back on, drill a 1/2" hole directly behind where the electrical connector screws to the front of the baseplate, and run your wires through that hole. Install the connector, and you're done. I left a lot of spare wiring coiled up and zip tied behind the plastic spray guard so when I replace the front bumper, there is no chance I'll be short on wiring.

As for the wiring. There are many options, installing separate bulbs in the taillights and a separate wiring harness is one, using diodes as some have done is another. In my opinion, my soultion was by far the easiest and the best. I simply purchased a second JK trailer harness (my Rubi already had one installed from the factory). Pull out the left taillight assembly, and snap in the second harness, then route the wire out the bottom following the other harness. You can even snap the retainers into the factory holes to secure it. Then reinstall the taillight.

Once this is done, buy a 4-wire 25' trailer harness from Lowes which has the correct 4-wire end plug which plugs neatly into the end of the second (or first) harness you just installed. I tucked the 25' harness inside some 3/8" split loom and zip tied it to the rear brake lines along the left frame rail to get to the front. Routing from there is your choice.

I also installed a TOAD-Charge (http://www.rvupgradestore.com/index.asp?PageAction=VIEWPROD&ProdID=442) under the hood utilizing the 12V stud under the power distribution/fuse block panel for +, and one of the two ground studs next to it for ground.

I finished last night at 9pm, and tested it behind the RV this morning. With the JK key turned to the first position and the 6-wire RV harness installed between the RV and the connector on the front of the JK at the base plate, this is what you get.
1. With parking lights on in the RV, the JK's tail lights, license plate light, and front marker lights all illuminate.
2. When using the brakes, both tail lights come on.
3. When using turn signals, only the rear tail lights flash, the fronts do not.

This set-up generates no errors in the computer, and works whether the key is off, in position #1, or position number two. Plus, it doesn't require installing diodes, drilling holes in your tail lights, and the benefit of having the front marker lights on increases your side visibility at night making it safer when stationary. Lastly, with the TOAD-Charge, you get the benefit of having the JK's battery receiving a constant charge while towing to prevent draining while extended towing. This is due to the fact that you have to leave the key turned to position #1 which energizes some of the JK's circuits, eventually draining the battery over time.
When the RV is shut off, the charging stops, and the isolator prevents the JK's battery from discharging into the RV battery bank. Once the JK's battery reaches full charge, it turns to a trickle charge only, to prevent overcharging the JK battery.
Sweet setup, once all the wiring is done!! I haven't tried hooking up the Adventa tow bar yet. May try that tonight. Will try to post pics then also.

Remember That the tow bar should sit level or angled upward toward the RV by no more than 4".

Tom
Bryson City, NC

Will try to post some pics at lunch today.

Tom Bryson CIty, NC

exgman
03-24-2007, 12:17 PM
Tom, thanks for the write-up. I've been trying to figure out a way to keep from disconnecting the battery while towing and you seem to have solved it. I'm going to give it a try.

Dan

Gasser
03-24-2007, 04:47 PM
Can't wait to see pictures. I guess if I end up lifting the jeep a little, I will have to find a way to level out the tow bar setup.

BILLARF
03-24-2007, 06:05 PM
Tom, thanks for the write-up. I've been trying to figure out a way to keep from disconnecting the battery while towing and you seem to have solved it. I'm going to give it a try.

Dan

When your JK leaves the factory, the "IOD" fuse found in the PDC / Power Distribution Center (engine compartment, passenger side, near battery) is pulled. This is done so the battery does not drain while the JK is in route to the dealership. Pulling the IOD fuse is also smart to do if vehicle will be in storage for say 20 days or more..

When flat towing you can pull the IOD fuse versus disconnecting the battery. When flat towing, even though the ignition key is turned to position #1 which energizes some of the JK's circuits, you will not have draining of the battery over time. The IOD fuse is easy to pull and to plug back in. Of course, if you are running a brake buddy or similar device running power from the RV to the toad makes sense.

As shown in the pic, when the IOD fuse is pulled you will see the words "noFUSE" displayed on the instrument panel.
http://www.auffarth.com/Videos/lite.JPG

Damlaker
03-26-2007, 11:48 AM
Okay, I admit I am not a techie or mechanically inclined but I really like SpudRacer's idea for the extra wiring harness and simply plugging it in. 2 questions:

1. If you already have a traler harness plugged in (mine came from the factory that way), is there an extra place to plug it in? Spud, your post seems to indicate that there is an easy plug in??

2. When I tow my JK, I will have a "Brake Buddy" which is a little machine you put in front of the driver's seat (and plug into a 12v outlet) and hook it up to the brake pedal. In a hard stop, it actually pushed down the brake pedal thereby activating the brake lights. However, with the 2nd wire harness already hooked up to the RV, the lights will already be on. Will this short out the system in any way?

Thanks.

BILLARF
03-26-2007, 05:03 PM
Consider using the harness in the following link..... Cool Tech does the work for you so to speak.. Will work in conjunction with the factory installed tow harness you say you have on your JK. Cool Tech LLC, will gladly answer your questions and concerns if you email them. Now, as far as the Brake Buddy you can bring auxiliary power to it via a pin on your 6 pin round connector or by using other means to bring auxiliary power to the Brake Buddy such as a Toad Charge mentioned earlier or a similar device.

http://www.cooltechllc.com/servlet/Detail?no=13

http://www.cooltechllc.com/catalog/JKTowHarness.JPG

SpudRacer
03-26-2007, 05:16 PM
OK, photos are uploaded. http://my.project-jk.com/showgallery.php?cat=500&ppuser=113

I got a ton of pics during our first tow this weekend also, but haven't gotten them loaded into the computer yet.

Please see the pics which clearly show how easy it is to plug in a second trailer wiring harness behind the left rear tail light, and route it out the bottom.

As for shorting out the system, I can turn on the RV turn signals or apply the RV brakes to illuminate the JK's brakes, then mash on the JK brake pedal. The JK's brake lights will get barely perceptibly brighter. This causes no shorts, faults of any kind. You can start up the Jeep, turn on the turn signal while the RV turn signal is on, no interaction between the two. It's as if they do not recognize each other and function independently. Does this answer your questions?

Tom
Bryson City, NC

Damlaker
03-26-2007, 09:56 PM
Thanks guys - this is very helpful. All I need to do now is return the Blue Ox Wiring harness I bought which would have required putting in another bulb. Why bother with your great idea SpudRacer. Thanks again.

The Jeep
06-10-2007, 09:15 PM
I just installed the mopar wire harness. Not to hard to install. The lights on the Jeep work fine until I hooked it up to the RV. When I step on the brake (in the RV) nothing. If I use the turn signal it alternates from left to right sides. If I connect only one function at a time like the right tail light it works fine for that one light. Bad ground and getting feed back from other functions maybe? Anyone get this to work? The harness was part # 82211156. I should of just made my own.

Thanks
Jim

BILLARF
06-11-2007, 03:42 AM
I just installed the mopar wire harness. Not to hard to install. The lights on the Jeep work fine until I hooked it up to the RV. When I step on the brake (in the RV) nothing. If I use the turn signal it alternates from left to right sides. If I connect only one function at a time like the right tail light it works fine for that one light. Bad ground and getting feed back from other functions maybe? Anyone get this to work? The harness was part # 82211156. I should of just made my own.

Thanks
Jim

Return whatever you have to the dealership for a refund..

Go with the harness at the following link..... Cool Tech does the work for you so to speak.. Will work in conjunction with the factory installed tow harness you say you have on your JK. Cool Tech LLC, will gladly answer your questions and concerns if you email them. Now, as far as the Brake Buddy you can bring auxiliary power to it via a pin on your 6 pin round connector or by using other means to bring auxiliary power to the Brake Buddy such as a Toad Charge mentioned earlier or a similar device.

http://www.cooltechllc.com/servlet/Detail?no=13

http://www.cooltechllc.com/catalog/JKTowHarness.JPG

BILLARF
06-11-2007, 03:47 AM
For more info on flat towing the JK, go here http://irv2.infopop.cc/eve/forums/a/tpc/f/7586073452/m/3541098163

The Jeep
06-12-2007, 11:25 AM
What happens when the brakes are applied in the RV and the Brake is applied it the car with the Cool Tech harness? I have had 2 other cars and they required diodes.

BILLARF
06-12-2007, 03:31 PM
What happens when the brakes are applied in the RV and the Brake is applied it the car with the Cool Tech harness? I have had 2 other cars and they required diodes.

You would see the brake lights come on with no conflicts.. Diodes are not necessary nor would I even consider using diodes. IF I opted not to go with the Cool Tech, LLC Inc. harness my next choice would be to add an extra bulb and socket to each tail lamp. I would go with the Cool Tech harness though! By the way, I think you are over complicating this thing. There are a bunch now using the Cool Tech harness and all are 100% happy with it. I've installed two and easy easy is the install for most anyone. Email or call the manufacturer (ask for Kendall) and he will answer your concerns. IF you were to have any install issues (doubt you would) you can be sure Kendall will work you through it. His product backing is tops ! I was one of the first with the harness offering and can tell you Kendall is there for you 110% !

The Jeep
06-12-2007, 04:49 PM
Thanks for the info I am going to try the Cool Tech harness. I just wanted to make sure that this will work. After installing the DC harness and it didn't work, I don't want to do it a third time. Now I just need to fix the 1 1/8 inch hole that I had to drill in the firewall for the DC harness.

BILLARF
06-12-2007, 05:03 PM
Thanks for the info I am going to try the Cool Tech harness. I just wanted to make sure that this will work. After installing the DC harness and it didn't work, I don't want to do it a third time. Now I just need to fix the 1 1/8 inch hole that I had to drill in the firewall for the DC harness.

When you do the Cool Tech, LLC harness install do take the time to fish the cabling though the drivers side frame rail. Only takes a few minutes more to do versus just zip tying the cabling under the Jk.

dpoelstra
07-04-2007, 11:57 AM
Just an FYI...

I have not read every post here, but Mopar has a factory wiring harness for RV towing. It plugs in under the passenger side dash and routes throught the engine compartment to the grill, and even comes with the connector cord. Very easy install and works with factory lights with no issues at all.

www. mopar.com

The drawback is the cost is $140, but is is a clean factory install.