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Old 09-29-2016, 01:18 PM   #21
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Also, good job on finding the Alpha tow bar. I did the same to find my Roadmaster Falcon All Terrain. Craigslist. Only used maybe a dozen times. It's been great so far.
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Old 09-29-2016, 01:44 PM   #22
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From what I found... Basically any wiring harness that utilizes the factory bulbs can have interference from the brake light triggered by the aux brake. To get around that you'd have to pull the brake fuse so that only the MH would light up the brake lights. I didn't want to deal with pulling fuses and didn't want the "risk" of tampering with the factory jeep wiring so I went the route of a whole new bulb and separate wiring. It really wasn't much more work than installing any of the harnesses.

Well, I guess that answered that question. Time for Plan B, research the extra bulb wiring OR look at not connecting the Wrangler brake lights to the RV brake line, use only the turn signal lines.

As far as charging... I haven't crossed that bridge yet. Our Jeep is a 2015 and doesn't have a steering wheel lock so the key is off and in my pocket. Only the aux brake is drawing power and from what I've read most are getting 2-3 days of towing before the battery drains much.
You're in a different situation with the 07 so a charger may be a good idea if you're going to tow for many hours at a time without starting the jeep.
I need to find out if my steering wheel locks in the key off position. This is my first MH so not sure how long we will drive each day. With our fifth wheel we try to get off the road by 5PM or before dusk, whichever occurs first.
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Old 09-29-2016, 01:52 PM   #23
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Turn signal and brakes are on the same leads according to e-trailer.com. Looks like separate bulb wiring is in order.
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Old 09-29-2016, 02:50 PM   #24
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Turn signal and brakes are on the same leads according to e-trailer.com. Looks like separate bulb wiring is in order.
OK. So, the only thing you have to worry about is what happens when the auxiliary brake system depresses the Jeep brake pedal. If you don't need your keys in the ignition while towing (ie: if your steering wheel does not lock when keys are removed), and if depressing the brake pedal with nothing else "ON" in the Jeep illuminates the brake lights on the Jeep, then you will still need to remove the brake light fuse.
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Old 09-30-2016, 04:36 AM   #25
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OK. So, the only thing you have to worry about is what happens when the auxiliary brake system depresses the Jeep brake pedal. If you don't need your keys in the ignition while towing (ie: if your steering wheel does not lock when keys are removed), and if depressing the brake pedal with nothing else "ON" in the Jeep illuminates the brake lights on the Jeep, then you will still need to remove the brake light fuse.


Aarrrgghhh! Always the "gotcha" comes from out of the blue.....

No alternatives right? Remove fuse or battery disconnect? Who was the guy who said Wranglers were "plug and play"?
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Old 09-30-2016, 08:01 AM   #26
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OK. So, the only thing you have to worry about is what happens when the auxiliary brake system depresses the Jeep brake pedal. If you don't need your keys in the ignition while towing (ie: if your steering wheel does not lock when keys are removed), and if depressing the brake pedal with nothing else "ON" in the Jeep illuminates the brake lights on the Jeep, then you will still need to remove the brake light fuse.
I can pull the keys out of mine and when the aux brake presses the pedal the lights come on but since I have a seperate line and bulb for the MH to control I don't care if the Jeep brake light comes on or not. In that case there will just be two brake lights on. Is there a reason I should care?? I have the aux brake set to a low sensitivity so except in medium or more braking it never engages.

In NickM's case.. Since he has an 07 I'm fairly certain he'll need to leave the key in. They didn't remove the steering lock until 2012 or 2013.
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Old 09-30-2016, 08:50 AM   #27
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I can pull the keys out of mine and when the aux brake presses the pedal the lights come on but since I have a seperate line and bulb for the MH to control I don't care if the Jeep brake light comes on or not. In that case there will just be two brake lights on. Is there a reason I should care?? I have the aux brake set to a low sensitivity so except in medium or more braking it never engages.

In NickM's case.. Since he has an 07 I'm fairly certain he'll need to leave the key in. They didn't remove the steering lock until 2012 or 2013.
The one thing you have to worry about with your setup is if the turn signal on the Jeep's second motorhome-only light bulb cannot be seen from behind by other drivers when the built-in Jeep brake light bulb is lit. It could get you a ticket, but that's not likely. I'd be more concerned about any potential for an accident because other drivers don't know you are turning or changing lanes.

I'm not a JK Wrangler expert by any means, but I think you're right about the steering lock. I have to leave the keys in the ignition on mine while towing, in my 06 LJ Wrangler. Mine has a position between "lock" and "on" which unlocks the steering column, but does not turn on the Jeep's electricals. Don't know about the 07s, as those are a different generation of Jeep entirely.
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Old 09-30-2016, 08:53 AM   #28
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Aarrrgghhh! Always the "gotcha" comes from out of the blue.....

No alternatives right? Remove fuse or battery disconnect? Who was the guy who said Wranglers were "plug and play"?
I think those are your two alternatives if you're going to use external lighting and wiring while towing. Assuming, of course, your brake lights come on without the key in the "on" position. Be also advised that if you disconnect the battery, you still have to provide a power source for your auxiliary braking system to run the compressor and electronics. This is the reason I chose to use the Jeep wiring and lights, the wiring harness with diodes, and go to the trouble of setting up my own battery charging circuit on the Jeep.
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Old 09-30-2016, 11:31 AM   #29
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The one thing you have to worry about with your setup is if the turn signal on the Jeep's second motorhome-only light bulb cannot be seen from behind by other drivers when the built-in Jeep brake light bulb is lit. It could get you a ticket, but that's not likely. I'd be more concerned about any potential for an accident because other drivers don't know you are turning or changing lanes.
Just thinking about this situation, in my mind (feeble that it is) I would think that anyone behind the keep could distinguish between the normal jeep brake light and a blinking red below it for the turn signal.

@Dustdevil - how much difficulty to pull the fuse? I haven't looked at my owners manual yet, been busy getting the fifth wheel ready to trade in while searching for an RVi2 brake. Scored one on eBay last night under $700, Yoo-hoo!
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Old 09-30-2016, 04:49 PM   #30
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Just thinking about this situation, in my mind (feeble that it is) I would think that anyone behind the keep could distinguish between the normal jeep brake light and a blinking red below it for the turn signal.

@Dustdevil - how much difficulty to pull the fuse? I haven't looked at my owners manual yet, been busy getting the fifth wheel ready to trade in while searching for an RVi2 brake. Scored one on eBay last night under $700, Yoo-hoo!
Pulling fuses is the easy part. Your manual will direct you to the right spot.
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