I installed the Ohmmu 12v in my 2017 X yesterday. It was not the most fun I've ever had
Here are some tips and annotated pictures in case it helps someone else.
Also have included pictures from the 12v monitoring tool I've used for a couple of years.
A couple things to note about the graphs. I didn't see a noticeable drop in the voltage
during an OTA install that happened yesterday as I did with the previous one recently.
- Mostly because I didn't have the flexible ratcheting wrenches as they used in the video above.
I did have various sizes of socket wrenches and I found a medium one that worked pretty well
but it was slow to untighten and retighten because of limited space around all the wires.
My Amazon wishlist now has this in it: https://smile.amazon.com/dp/B07SYCY2SW?th=1
- The install video hints at the wire harness attachment and it made it much easier after doing that.
(highlighted this location in my picture below (see the white box and blue lettering).
- The bracket is a pain in the butt to get both in and out. Install video does hint about this.
- I had to bend the bracket a little because of the lips on the top of the battery because
it didn't want to drop down that extra ~1/2" that was necessary to put the L-shaped lock down bracket back.
- After taking out the old battery and bracket, I didn't see where the 12v battery terminal size adapters were.
I panicked slightly thinking they forgot to include them. They were underneath a sticker in the
styrofoam packaging.
SUMMARY reference for order of wire disconnect/reconnect. (service manual suggestion).
Take out
1) Disconnect 12v ground (-)
2) Disconnect the first responder loop
3) Disconnect 12 positive (+)
Put in
4) Connect 12 positive (+)
5) Connect the first responder loop
6) Connect 12v ground (-)
[ Jump in the vehicle and verify all boots up OK.
A msg will show up to calibrate FWD; hold the button for several seconds and
follow instructions. They only move a few inches and do not fully open. ]
PURPLE arrows point to the lip on the battery which was the reason to bend the bracket a little.
New battery is still charging higher than I'd expect above 14v. You can see after the installation the charging voltage crept up from ~13.4.