High Voltage Battery Recharge

[nycpilot]

Hopefully someone can help with this....I was doing some body work on my 2013 ford fusion energi. It involved using a stud welder. The stud welder manual advises to disconnect the car's battery before using it. So, I disconnected the 12volt and after looking up if I should disconnect the high voltage battery....i concluded that I should.... so I disabled it by pulling the orange fuse/relay behind the rear passenger seat. I then let the car sit for 10 minutes to let the battery discharge.

    I finished my work. I reconnected the orange fuse/relay. I then realized I couldn't access the trunk. So, I jumped the car with a standalone jumper via the front end prongs under the hood. The car started in active mode. I popped the trunk reconnected the 12v.

 

    But now the car has the stop safely warning message and will not take a charge from the wall plug in. I let the car stay plugged in overnight with no success. Do i need to reset something? Do I just have to clear codes with a scanner? There really is nothing wrong with this car. I just disabled the high voltage battery and now it will not charge. Any ideas of how to fix this? I really dont want to take it to a dealer. 

 

   Would a jump from another vehicle give it more juice or start the ICE engine?

Edited May 27, 2021 by nycpilot

[lolder]

No. The 12 vdc does not start the ICE, the HVB does. You are not getting the HVB back on line. This is dangerous work fiddling with the HVB. You may have blown the HVB fuse. You disconnected both batteries so it's unknown what reset is required. The HVB is not user serviceable.

[nycpilot]

Its strange that I would of blown a fuse since I followed the jumpstart procedure in the manual.

[nycpilot]

So....it was a case of stupid operator error. I read the code that it spit out and it said battery disconnect. I went back to the orange service disconnect and discovered that i did put the tap back in but I didnt slide it all the way....i slid it sideways and then trickle charged the 12v to recover the drain that I gave it and presto....everything came to life....the car wants to drive again.....so leason learned.....after putting in the tab you need to slide the part that slides.

[eisbaer]

Just out of interest, did you use voltage insulating gloves to disconnect the HVB or just your bare hand?

[nycpilot]

I used gloves and I waited about 20 mins for full discharge....even though i have read 10 mins is sufficient.

[nycpilot]

I just want to add something else....this car - the ford fusion energi titanium - has been the best car that i have ever owned. I have 175k miles on it. It has never needed anything major replaced.....i repeat nothing. I have done the usual regular maintenance but this has been the most reliable car in my experience. 2013 175k miles....single owner the entire time...also I hit a deer with it and had storm damage at one time....all repaired to as new condition with no problems.

Edited May 28, 2021 by nycpilot

[lolder]

Happy result !

[MeeLee]

400V DC isn't as damaging as 240V AC.
You could hold the positive terminal, and negative terminal and feel nothing more than a slight tingle.
Perhaps some of your muscles will cramp.
But it won't immediately kill you.
I wouldn't touch the 400V motor connectors though, because they are AC.

Just saying...