Welcome to Tesla Motors Club
Discuss Tesla's Model S, Model 3, Model X, Model Y, Cybertruck, Roadster and More.
Register
  • We just completed a significant update, but we still have some fixes and adjustments to make, so please bear with us for the time being. Cheers!

Recent content by DonTom

  1. DonTom

    Master thread: Model 3 12v Battery issues, monitoring, Aftermarket replacement

    I did watch the video, and that was what made me ask. It looks like the entire bar is replaced, not just the little cheap plastic thingies. But I still am not sure. If the ebay thingy isn't for that, what is it? -Don- Auburn, CA
  2. DonTom

    Master thread: Model 3 12v Battery issues, monitoring, Aftermarket replacement

    Is this also a fix for that? -Don- Auburn, CA
  3. DonTom

    Master thread: Model 3 12v Battery issues, monitoring, Aftermarket replacement

    I would guess that it is even safer to leave the old battery connected. Even if it has a shorted cell in the old battery, it most likely won't be a dead short and the voltage will still come up to the voltage of your GB40 when properly connected. But it is somewhat of guesswork, as batteries can...
  4. DonTom

    Master thread: Model 3 12v Battery issues, monitoring, Aftermarket replacement

    My "jumper device" do you mean a small battery pack in parallel with the dead 12 V battery? Hard to say what will happen when the DC2DC converter is shorted. It depends on the design. Some could just turn off automatically, if they have current limiting, which is not uncommon these days, but I...
  5. DonTom

    MASTER THREAD: Range Loss Over Time, What Can Be Expected, How to Maintain Battery Health

    I believe the mile spec is for 65 MPH and seems accurate to me at that speed. The best range is at 38 MPH, IIRC, and at that speed, expect better than 400 miles of range, At 78 MPH, I would expect poor range. If you can drive a steady 65 MPH, you should be able to do the 241 miles, if not...
  6. DonTom

    Master thread: Model 3 12v Battery issues, monitoring, Aftermarket replacement

    I wonder if the Tesla even uses the chassis ground for the 12 volts. I can tell you that my Zero motorcycles uses a floating ground. The bikes doesn't use the frame to complete any electrical circuits. So to even measure any voltages, I use the headlamp low in place of a frame ground. In EV...
  7. DonTom

    Master thread: Model 3 12v Battery issues, monitoring, Aftermarket replacement

    I just now used my FOB to unlock my Tesla M3 and used the 9V battery to open the Frunk. Worked perfectly. So then I locked the doors with my FOB and tried the 9V battery again and it did NOT work, just as as it shouldn't, I guess the only way we can do a real test is either wait for the 12V...
  8. DonTom

    Master thread: Model 3 12v Battery issues, monitoring, Aftermarket replacement

    I didn't quite understand that. What do we do it the 12 volt battery is 100% dead and we cannot use the phone to unlock it????? And if we can unlock the doors, why do we need to use the 9 volt battery to unlock the Frunk? EDIT:I just now watched it again. I now see the 9V will work when the...
  9. DonTom

    Master thread: Model 3 12v Battery issues, monitoring, Aftermarket replacement

    That was the first time I removed that cap. I am glad I did, because I cannot figure how to use it. There is only a single wire. How is that going to work? What do we used for the return path or ground with our 9 V battery? Edit: Disregard. See posts below. -Don- Reno, NV
  10. DonTom

    Master thread: Model 3 12v Battery issues, monitoring, Aftermarket replacement

    I realize we cannot get in the car as the locks are 12 volts. But I was wondering what would happen if we could. Seems to me if we can get the car on, the DC2DC converter will supply the 12 volts. But is the 12V also required to get the car turned on? -Don- Reno
  11. DonTom

    Master thread: Model 3 12v Battery issues, monitoring, Aftermarket replacement

    Is the 12V required to drive the car if you can get in it? -Don- Reno, NV
  12. DonTom

    Master thread: Model 3 12v Battery issues, monitoring, Aftermarket replacement

    In that case, I will carry the 9V battery AND keep a new spare 12V battery in the Frunk. Just for the fact that the lithium should have a very long shelf life and is lighter and can be stored in any position, that makes it good idea to keep in the frunk if I do not want to replace it before the...
  13. DonTom

    Master thread: Model 3 12v Battery issues, monitoring, Aftermarket replacement

    I plan on replacing it myself. A lot less hassle. I usually fix my own problems even during the warranty period at my own cost, when possible. Replacing the 12 volt battery is a very simple job:

About Us

Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.

Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


SUPPORT TMC
Top