BrentHG Posted May 16, 2017 Report Share Posted May 16, 2017 According to the Owner's Manual, my 2017 Edge can be towed behind my motorhome, all 4 tires down. It says to disconnect the Neg(-) terminal while towing. My question is: Does this reset everything back to factory in the Sync 3 system? BrentHG Knot At Sea 2005 Fleetwood Discovery 39S http://knotatsea.blogspot.com Quote Link to comment Share on other sites More sharing options...
akirby Posted May 17, 2017 Report Share Posted May 17, 2017 No it doesn't. Quote Link to comment Share on other sites More sharing options...
chefduane Posted May 17, 2017 Report Share Posted May 17, 2017 Even if it did, you could use a battery system minder with an OBDII cable plugged in and keep the electronics alive. Quote Link to comment Share on other sites More sharing options...
omar302 Posted May 17, 2017 Report Share Posted May 17, 2017 Even if it did, you could use a battery system minder with an OBDII cable plugged in and keep the electronics alive. Wouldn't that counter the reason why the battery was disconnected in the first place? Quote Link to comment Share on other sites More sharing options...
chefduane Posted May 17, 2017 Report Share Posted May 17, 2017 Perhaps, yes. But I >think< that power to the OBD port keeps SYNC alive and does not affect the servos or electro-mechanicals that control trans operations. I could be wrong on that and more research would be necessary before I'd consider a 4 down tow, but that is how I understand it. With the battery disconnected the drive train system intelligence is non-functioning and therefore a 4 wheel freewheeling tow is safe, but the minder would keep all the SYNC settings. Maybe someone who is better versed on this can provide a better explanation. As I said, I think that's how it operates but I could be wrong. 2 Quote Link to comment Share on other sites More sharing options...
akirby Posted May 17, 2017 Report Share Posted May 17, 2017 I think Duane is right but it's a moot point because it doesn't reset the sync 3 settings to leave the cable disconnected. 2 Quote Link to comment Share on other sites More sharing options...
enigma-2 Posted May 17, 2017 Report Share Posted May 17, 2017 (edited) If you're considering disconnecting the battery cable to tow (and you are required to reconnect after a certain period of hours, 6 if I remember) a battery switch would make this job much easier. Examples: BEP 701 Battery Switches - On-Off https://www.amazon.com/dp/B005DUUL9W/ref=cm_sw_r_cp_apa_2bnEBbF512VYA NOCO ID220S 6V-24V 125 Amp Battery Disconnect Switch https://www.amazon.com/dp/B006EH9WUC/ref=cm_sw_r_cp_apa_RenEBbMR5VXYR edit note; the original link was 404, added url to new link. Edited August 19, 2018 by enigma-2 3 Quote Link to comment Share on other sites More sharing options...
chefduane Posted May 18, 2017 Report Share Posted May 18, 2017 Ingenious little device! Why don't they put one of those on at the factory? Sure would make a lot of things easier. I might consider putting one of those on just because. Great info Enigma. 1 Quote Link to comment Share on other sites More sharing options...
Ajackb Posted May 19, 2017 Report Share Posted May 19, 2017 Question - why couldn't you use the Brake Shift Interlock that allows a tow driver to get dead vehicle out of Park? It's easily accessible behind a panel below the shifter in my 2011. Alan B 2011 Ford Edge Quote Link to comment Share on other sites More sharing options...
rdmodlin1 Posted August 18, 2018 Report Share Posted August 18, 2018 do i have to take the negative cable off? Quote Link to comment Share on other sites More sharing options...
Ajackb Posted August 19, 2018 Report Share Posted August 19, 2018 Im flat towing a 2011 Edge and do not disconnect the battery cable. I have not had any issues. Quote Link to comment Share on other sites More sharing options...
enigma-2 Posted August 19, 2018 Report Share Posted August 19, 2018 do i have to take the negative cable off?According to the ownersame manual, yes. See page 238 in the owners manual for towing all 4-wheels on the ground. Quote Link to comment Share on other sites More sharing options...
rdmodlin1 Posted August 19, 2018 Report Share Posted August 19, 2018 what happends if you don't take the neg cable off? Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted August 20, 2018 Report Share Posted August 20, 2018 the battery will run down, and have to be recharged every so often (6 hour intervals IIRC). That is generally why people put on a TOAD of some sort. http://www.rvnetwork.com/topic/122304-2015-ford-edge-toad-is-a-battery-charge-line-sufficient/ https://www.countrycoachforums.com/index.php?topic=17808.0 https://www.carprousa.com/car-pro-guide-to-dinghy-towing Quote Link to comment Share on other sites More sharing options...
rpspiker Posted August 28, 2018 Report Share Posted August 28, 2018 I'm working through this right now. What really hit me was when I thought about starting the Edge with keyless ignition. I Have to hit the brake pedal first and that activates a considerable portions of the vehicle electronics. Then I thought about driving the RV and how often I hit the brakes; and each time I do I'm initiating the "start" sequence. I can readily see why the battery would run down. Next question, once the battery is disconnected I guess you have to use the key to lock and unlock the car? Would an ODBII battery tender allow keyless entry to function? And another questions. If you use the TOAD CHARGER (http://www.lslproducts.net/TC_Broch.pdf), what impact would that have on the system electronics, since you would still be activating the "start" sequence each time the brakes were applied. Quote Link to comment Share on other sites More sharing options...
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