FrostedLogic

Title says it all, I was taking off the transmission and needed to provide a power source to rotate the driveshaft and I connected the battery with jumper cables and ended up making the cables hot and drained the battery, no more actions were made after, unsure which fuses to check or what to do.

Jaap

If the battery that was still in the car had some juice left, this may not be that bad.
How empty/dead was it?
What year is your S550? (your sig doesn't say)
Did you do it under the hood or in the trunk?

BOTUS

check ALL pre-fuse boxes (probably blown them to hell) and buy a new alternator..... batteries probably hated it too - other stuff maybe properly muddled

easiest thing is to stop doing what some people mistakenly did in the 1970s - when they had half an excuse as positive earth cars where just getting old and previously dynamos didn't care... all of which meant things 55 years ago were still a bit odd

FrostedLogic

2007, the battery went from 11 volts (from sitting) to 7 volts seemed toasted, It was my accessory battery in the trunk

MB2timer

I thought I was careful before, when connecting a charger, or heaven forbid jump starting. I am going to be meticulously careful now.
Speaking of jump starting, there is a process called bump starting that is becoming an arcane art.

BOTUS

BW35 had a front and rear pump and that auto could be bump started if you can get it above 20 mph - not aware of any other autos in the last 59 years than can do it !

https://archive.commercialmotor.com/...c-transmission

Jaap

Right.
Replace rear battery.
Test front battery - replace only if it's bad
Check fuses as BOTUS said.
If car eventually runs, test alternator (voltage should be around 14V)

Senecat

Keep us posted!

atikovi

Folks, newbie Angela lisa spammed me in a PM with,

I don't know but ,have you by any means heard of Foreign Exchange/ Cryptocurrency trade market, a world licit forum which you can be earning huge profits weekly from just your devices ?

Anybody else?

Senecat

Yeah, total spammer. The bot is blasting me about my 1983 Nissan. Ignored.

MB2timer

That should be grounds for banning. The PM feature should not be used to spam.

Senecat

The bots are getting smarter (AI) and taking on personalities of their own. True spam Turing Tests coming soon. I smelled it right off the bat though, so they have a ways to go yet Lol

vettebk

My Mom always told me never talk to strangers.....

JohnLane

I got to deal with those decades ago in what were old Volvos. Definitely the bad old days.

auburn2

This video has some useful information regarding reversed polarity blowing a main power fuse:

Ludedude

report to the mods/admins if you haven't already.

atikovi

No idea how.

Ludedude

On the upper right of the message you should see an icon of a red octagon with an exclamation point in it:

Click that to do so.

atikovi

Haha! Can't they just have something more obvious, like a "Report this Post" button? Anyway, already deleted the notification email, so how do I find the message? I don't see a MY MESSAGES link anywhere on the page.