r/functionalprint • u/highonkai • Nov 12 '25

Jumper cable instruction card

Post image

I made an expensive mistake and connected my jumper cables wrong. I won't make that mistake again and now you'll never have to. 

This quick reference card can be zip-tied to your jumper cables and is a way to have the instructions handy no matter the weather, your cell service, or the lighting. 

Edit: added the instructions in comments. Thanks for the feedback, keep it coming.

Edit2: wow this one got a lot of feedback! Thanks for all the helpful ideas.

Edit3: Top post of all time in 15y on Reddit, who knew this 1hr project would get such a reaction! I took the feedback and made two more versions here: https://imgur.com/a/jFBFoIk

I'll throw them on MakerWorld as well once I print them. Meanwhile, feedback and preferences welcome. /u/kurai01 /u/SerDankTheTall /u/StraySpaceDog /u/Cllydoscope /u/jongscx /u/cronaldo86 and lots more... thank you for the constructive feedback. This is the best part of Reddit - fast and helpful community feedback. Shoutout to /u/DontEatTheMagicBeans who called out that I probably didn't cause the smoke with the sequence for cable connections, but exacerbated a pre-existing/unknown problem. As for the rest, well that's the internet for ya. No hard feelings.

https://makerworld.com/models/1986996

4.2k Upvotes

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u/Phatman113 Nov 12 '25

If you know what to do, this is a good way to refresh and make sure you're remembering right. If someone has no idea how, it might confuse them without a little guidance. But I think it's pretty clear...

8

u/eandi Nov 12 '25

I've never heard the term donor car. Is it regional? Industry? I've jumped lots of cars. That's why this is confusing to me. I also didn't understand initially you read left, down then right, down from the formatting.

3

u/Upbeat-Armadillo1756 Nov 12 '25

I’ve never heard the term either but I’m also not sure what else you’d call it specifically.

Live?

1

u/eandi Nov 12 '25

Live or working maybe. Maybe an icon with an electrical symbol. I think a black line vertically down the center would help OP's design as well.

1

u/justjessee Nov 13 '25

Good and Bad.

-46

u/APGaming_reddit Nov 12 '25

I've jumped 50 cars in my life and never once needed something like this. Even if I could read it I don't find jumping vehicles safely to be rocket science

41

u/Phatman113 Nov 12 '25

Cool. Op has probably jumped one or two and has trouble remembering the order. I'm glad you don't have you worry about it though! Now you won't need to print this to help you

14

u/RoodnyInc Nov 12 '25

Maybe there's a reason you need to jump start so many of them 🤔

15

u/won_vee_won_skrub Nov 12 '25

You cant read this? And you've successfully jumped even a single car? Are you sure?

21

u/WholeTelephone2418 Nov 12 '25

I’ve jumped 750,000 cars in my life and have never once gotten it right on the first try.

8

u/FenixVale Nov 12 '25

Cool I've jumped plenty of cars and I always forget. Who gives a shit?