Can you jumpstart an EV?

Can you jumpstart an EV?

First thing's first: Find the LV battery, which could be anywhere in the vehicle.

Here’s a real-world scenario: A customer brings their EV into your shop for service, and it’s been there for quite a while because the parts are on backorder. After a few weeks, you get in the vehicle to move it out of your way, and the ignition won’t turn on. It’s acting like the battery is dead, so what do you do now?

Chances are that the low voltage or LV, or 12V, battery inside that EV has gone dead. In most cases, the LV battery is not charged while the high voltage (HV) battery is plugged into the wall charger. So, even if your shop is outfitted with an HV wall charger, the LV battery could still go dead if it’s left alone long enough.

This scenario can present a few unique challenges to us as techs or shop owners. The first question we need to ask ourselves is, “Can I jump this EV with another car?” We would advise against this idea. It’s much safer to have a dedicated battery jumper, preferably one with some electronic assist to protect the system from surges, inverse polarity, etc. Compact battery jump packs are available and are really handy for all kinds of situations.

Now you need to find the LV battery, and it could be anywhere in the vehicle. This of course will vary from one EV to the next, but the most common locations would likely be under the hood or in the trunk. But, herein lies another challenge – some EVs, specifically Teslas, have electronic door poppers which release the trunk and the hood, AKA the front trunk or frunk. So, it sort of turns into a “chicken before the egg” situation. How can you open the hood to get to the LV battery and jump it, if there’s no 12V power to actually open the hood?

Fear not, because Tesla thought this one out. There is a pair of wires that are located just behind the front tow hook cover in the front bumper cover. With a 12V battery jump pack on hand, press firmly on the top right perimeter of the tow hook cover until it pivots inward, then gently pull the raised section out toward you. Pull the two wires out of the tow eye opening and connect them to the jump pack: red positive to red positive, black negative to black negative.

Be aware that these wires are not a charging point for the LV battery. Applying 12V power to these wires will only pop the hood release, but now you can gain access to the LV battery inside. Open the hood and remove the trim panel which covers the LV battery. Locate the positive charge/jump post, and connect a suitable battery charger or jump pack to it. Attach the negative cable from the charger/jump pack to the beam in front of the LV battery. You should now be able to charge or jump the LV battery, and power on the ignition.

You May Also Like

Bridgestone Golf CEO Dan Murphy shares what links tires to teeing up Tiger Woods – PART II

In Part II of this interview, Dan talks about how tire tread patterns have influenced golf ball design, and vice versa.

dan-murphy-1400part2

Tiger Woods, Jason Day and Freddie Couples are just a few of the names linked to the quality and precision behind Bridgestone Golf – but the man behind the scenes who helped create and catapult the Bridgestone Golf brand to PGA grounds is Dan Murphy, the company's current president and CEO.

AMN Drivetime with Schaeffler’s Jerry Conroy

Jerry Conroy shares insights into his career trajectory, the evolving landscape of the company’s aftermarket operations, and its commitment to innovation and sustainability.

Drivetime_ Conroy
Bridgestone Golf CEO Dan Murphy shares what links tires to teeing up Tiger Woods – PART I

In Part I of this interview, Dan discusses successfully bridging the worlds of tires and golf balls into one premium branding experience.

dan-murphy-1400
Does your shop need a marketing firm?

Hiring a marketing firm won’t automatically bring in more business – it can lose you money if you don’t take proper steps.

TR-Continental-marketing
Michelin highlights sustainable milestones at Sonoma Raceway

We learn about sustainability strategies and new products, drive a Freightliner all-electric eCascadia Class 8 truck, and take a few hot laps around the track.

Michelin-Sustainability-Summit-1400

Other Posts

Continental Tire discusses how prioritizing dealer feedback maximizes profits

Continental Tire executives talk about the status of the PLT tire market, the company’s strategic balance between OE and replacement tire offerings, and more.

conti-Combo-1400
Michelin leadership talks EVs, sustainability and airless tires

Executives discuss the future of sustainable tire manufacturing, the relationship between EVs and tire waste and what’s next for airless tire technology.

Michelin-Q&A-1400
EV tire satisfaction gap widens as wear rates increase, J.D. Power study finds

The J.D. Power study shows that EV owners have similar expectations of tire wear as owners of gas-powered vehicles do.

Kumho Tire U.S.A. launches two new EV tire options

The Majesty 9 Solus TA91 EV is ideally suited for drivers of EV coupes, sedans, and CUVs, while the Crugen HP71 EV is designed for CUVs and SUVs with an added level of all-weather performance.

Majesty-9-Solus-TA91-EV-Crugen-HP71-EV-Kumho-Tire-1400