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Yes I work for Ford. I'm one of the engineers who release batteries, the BMS sensors, alternators and starters. So I have the h/w responsibiility of the charging & starting system. Yep, can connect the positive charge lead directly to the positive post of the battery.
Even though technically I should be telling you to connect the negative charge lead to the appropriate jump start stud noted in the owner manual, occasional charging 1 or 2/year will not really have an impact on anything. But constant re-charge or connecting other loads (added lights, stereo system, etc.) would definitely recommend not connecting to negative battery post directly. Only unless familiar and monitor battery health regularly.
Unhooked BMS cable last week and noticed -2amp battery current all during 30 minute drive. Hooked cable back up and all traces went back to normal after 2 minutes. SOC increased from 30% to 75% for 30 seconds, and then went to 41%. Is this normal?
Best,
Tom
If anyone is interested in a quality product, I bought a 6 volt charger from them to maintain my Trojan batteries on my travel trailer. Everything they make is made in Oklahoma City, and is 100% repairable. Lots of Chinese made stuff out there. Their stuff is commercial "buy it once" grade.
Yes I work for Ford. I'm one of the engineers who release batteries, the BMS sensors, alternators and starters. So I have the h/w responsibiility of the charging & starting system. Yep, can connect the positive charge lead directly to the positive post of the battery.
Even though technically I should be telling you to connect the negative charge lead to the appropriate jump start stud noted in the owner manual, occasional charging 1 or 2/year will not really have an impact on anything. But constant re-charge or connecting other loads (added lights, stereo system, etc.) would definitely recommend not connecting to negative battery post directly. Only unless familiar and monitor battery health regularly.
On a 2013, what if the BMS was disconnected like many on this site say to do?
Just went through the manual, they don’t mention a stud for the negative connection.
You are correct, just verified myself on the latest printing. Shot a note off to the F150 D&R/Owner team to be added. There are several vehicle lines which don't have it but should have been done starting with the 15MY programs.
Regarding the battery re-charge section, that is allowed as long as the BMS is allowed to be re-learned. What can happen is if somebody comes into a dealership regarding the shutdown early message. If the battery is re-charged incorrectly, the BMS has not had time to re-learn the SOC. So it will continue to display the shutdown message and shutdown. It needs a night of rest and dealing with repeat customers the next day is not fun for the dealerships, but service keeps allowing it.
In actuality, what most dealerships do is replace the battery even though original one checks out okay, just a weak charge. They will not want to re-charge the battery for more than 8 hours and hold up the vehicle.
sorry for any confusion I may have added by posting in this thread since mine is a 2013....different system and I disconnected the BMS at the recommendations of many.
12-13-2018, 09:55 PM
