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Old 01-26-2016, 10:49 PM   #11 (permalink)
turnpike
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I maybe wrong on this, but don't the "15s+ have electric assisted power steering. And who knows what the engineers over at the GM shop have put in alone with it. And does the stabilitrac system work all the time with key on? Inquiring minds need to know!

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Old 01-27-2016, 12:48 PM   #12 (permalink)
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I tried the GM Upfitters but all they said was that their understanding as to why was to prevent the accidental engagement of the transfer case and to prevent "possible" damage to the electric steering. The accidental engagement of the transfer case idea doesn't work because the same problem would still exist when dolly towing yet you don't have to disconnect the cable when dolly towing. As to damaging the electric steering, except for the steering lock what could be damaged if the cable is connected as opposed to being disconnected. Surely the electric steering system doesn't pull power when the ignition circuit is off, does it? I talked to another GM dealer and they said they don't see any problem with leaving the cable connected since the steering lock is disabled. The system for the transfer case is the same as the 2011 Tahoe had and we didn't have to disconnect anything to tow it. There is a relay I can pull on the transfer case but they said they didn't see any real reason to do that. They said I could do the same thing to my 2014 Silverado ( which they sold to me)and it has the electric steering. I would like to know exactly what components of the electric steering could be damaged so I would know what will not be warranted but I guess I'm out of luck since no one seems to know for sure why the negative cable has to be disconnected.

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Old 01-27-2016, 01:05 PM   #13 (permalink)
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If that is the case, does the electric steering assist go via a ckt breaker or relay? If so pulling it would do the same thing IMHO.
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Old 01-27-2016, 04:00 PM   #14 (permalink)
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I haven't found a relay for it yet but I agree that it should work if I can find it. There's bound to be one somewhere. I just don't understand how having the battery hooked up could damage it any more than without the elec. The front wheels are going to turn either way.
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Old 01-27-2016, 04:24 PM   #15 (permalink)
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I just read the Roadmaster installation instructions and I don't see any issues with it back feeding anything. The only point of back feeding is tail/turn signals and they are protected from doing so with diodes. But if you are still worried that it could back feed some how why not simply install a set of auxiliary lights for the towing system instead of using the vehicle tail lights. This would allow you to disconnect the battery from the vehicle with no chance of back feeding anything.
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Old 01-27-2016, 05:29 PM   #16 (permalink)
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I have already installed auxillary lights. My installer contacted Roadmaster direct and he said they would not guarantee that the unit would not backfeed. Disconnecting the battery leaves the vehicle without a breakaway system, which is required in most states, unless you install a separate battery. If the dealer had known his product, I wouldn't have traded the '11 off. The dealer said that towing the new one would be just like the old one. WRONG!!!!
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Old 01-27-2016, 05:47 PM   #17 (permalink)
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Again, why can't you use the truck's battery, which will be disconnected from the truck, to power the breakaway system ?

First, connect breakaway to truck battery positive. Now, and here's the hard part, disconnect the truck negative, and, install the breakaway negative to the truck battery. It can't be much simpler. Take one negative off and put a different negative on.
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Old 01-27-2016, 09:24 PM   #18 (permalink)
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