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Dead battery 2008 Tesla Roadster

Hi all, I have a 2008 Tesla Roadster the car has been sitting 3 years and has not been started at all. The battery is dead. It will not take a charge. Is it possible for me to get this car running without having to put a new battery in it?
If not. Is there a way I can atleast get the dash board lit up temporarily so that way I can get the car to auction and they can read the mileage on the dash board. If they can't see the miles they will brand the title and ruin it for everybody. Any tips? Thank you
 
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tccartier

Active Member
Supporting Member
Oct 27, 2015
1,022
1,118
AZ.
Hi all, I have a 2008 Tesla Roadster the car has been sitting 3 years and has not been started at all. The battery is dead. It will not take a charge. Is it possible for me to get this car running without having to put a new battery in it?
If not. Is there a way I can atleast get the dash board lit up temporarily so that way I can get the car to auction and they can read the mileage on the dash board. If they can't see the miles they will brand the title and ruin it for everybody. Any tips? Thank you

Have you tried jumping or perhaps replacing the 12 volt battery in the car you won't get anything if your 12 volt battery has died. your traction pack may still be alive.
 

dhrivnak

Active Member
Jan 8, 2011
4,531
3,962
NE Tennessee
Have you tried jumping or perhaps replacing the 12 volt battery in the car you won't get anything if your 12 volt battery has died. your traction pack may still be alive.
No 12v in a 2008. If the battery is fully dead then you are likely out of luck if not plugged in for over 3 years. There is a small chance the service disconnect was pulled but if not you are out $29k. Sorry
 

tccartier

Active Member
Supporting Member
Oct 27, 2015
1,022
1,118
AZ.
No 12v in a 2008. If the battery is fully dead then you are likely out of luck if not plugged in for over 3 years. There is a small chance the service disconnect was pulled but if not you are out $29k. Sorry

2008 used strictly a dc-dc converter for 12 volt power? Even if that is the case one could still trick the system and introduce 12-volt power into the same circuit
 

twiersum

Member
Jul 21, 2017
122
151
canada
You can get limited access to the battery through the BMB's on top back of ESS.

I made a custom BMB you can plug in to each sheet to get the voltage. Then if they are still alive, you can charge each sheet carefully through the same board.

3 years is a really long time though....
20180314_192923.jpg
 
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gregd

Active Member
Dec 31, 2014
2,600
1,819
CM98
Is the prior owner accessible for questions? As noted, check on the ESS Disconnect first. If pulled, you have a chance.

The 1.5's (2008) use a tap into the ESS at the second sheet to bring out 12v power. From there it should go to a DC-DC converter (2nd sheet would be something like 68 volts?), to supply a regulated 12v to the car. Pretty sure that DC-DC converter is inside the pack somewhere. In theory you might be able to supply 12v power at that point to fire up the main computer, but I would tread carefully. Don't want to cause more damage than has already (possibly) been done.

I'm guessing that plugging in a charging cord causes no activity / signs of life, right?
 
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spaceballs

Member
Sep 17, 2013
651
143
Sammamish
Hi all, I have a 2008 Tesla Roadster the car has been sitting 3 years and has not been started at all. The battery is dead. It will not take a charge. Is it possible for me to get this car running without having to put a new battery in it?
If not. Is there a way I can atleast get the dash board lit up temporarily so that way I can get the car to auction and they can read the mileage on the dash board. If they can't see the miles they will brand the title and ruin it for everybody. Any tips? Thank you
I've used a bench power supply and set it to 2 amps, and back fed into the 12v cig socket. This should be enough to get the millage off of it.
 
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TEG

Teslafanatic
Moderator
Aug 20, 2006
21,994
9,264
A strong word of caution - many packs have caught fire when people tried to improperly bring a 'dead' pack back to life through direct recharging.
A limited number of people know how to do it properly. Don't experiment trying to recharge the main pack yourself.
 
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Roadster

JdeMO Powered
Dec 10, 2016
1,609
1,329
SoCal
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DeedWest

2008 VP & 2011 2.5 Sport
Feb 5, 2014
903
1,031
Dallas, TX
Looks like "Nissan of New Rochelle" has this vehicle question now. I'm a little confused, as their website lists it for $27,999, but their AutoTrader listing shows it at $79,999.

Does this mean they stuffed a 3.0 battery into it and are reselling it? Seems rather impossible to get one THAT quickly. Either way, if it IS selling for $27,999, that's not a bad price if only the battery is the issue. For $49,999 and some change, you could have a 2008 Roadster with an R80 battery and a warranty.

Link HERE
 

Stewie26

Member
Supporting Member
Jan 29, 2018
66
131
Palos Verdes, California
Looks like "Nissan of New Rochelle" has this vehicle question now. I'm a little confused, as their website lists it for $27,999, but their AutoTrader listing shows it at $79,999.

Does this mean they stuffed a 3.0 battery into it and are reselling it? Seems rather impossible to get one THAT quickly. Either way, if it IS selling for $27,999, that's not a bad price if only the battery is the issue. For $49,999 and some change, you could have a 2008 Roadster with an R80 battery and a warranty.

Link HERE
Well, if nothing else they figured out how to see how many miles are on the car. (23K and change)
 

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