After jumping battery electrical components inoperable

Tiny
SUZANNE OLIVER
  • MEMBER
  • 1997 MERCEDES BENZ 500SL
  • 82,000 MILES
Left the key in the ignition for a couple of days which drained the battery. Jump started and got the engine running but now the electrical switch to operate convertible top and roll bar won’t work.
Saturday, December 19th, 2020 AT 8:50 AM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
I suspect the issue is the battery is still not charged enough or has a shorted cell. We need to load test the battery which most parts stores can do.

Here is a guide that will help with this:

https://www.2carpros.com/articles/car-battery-load-test

Most parts stores can do this free of charge. So let's make sure the battery is ok and if it is, we can start checking fuses. However, I suspect the battery is the issue because this is called load shedding. That means that when the voltage is too low it stops operating certain items so that it can save the voltage for the more important items.

Here are some other guides that will help others that may visit this page if they have a similar issue. They are not directly related but useful similar information.

https://youtu.be/a9Ycibu9cwY

https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

Let us know if the battery tests okay and we can go from there. Thanks
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Saturday, December 19th, 2020 AT 9:20 AM

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