Why You Always Disconnect the Negative Cable First

just a quick explanation on why people always say to disconnect the negative first.

buell motorcycle kawasaki mechanic battery

[byronrichards]

Thanks for this complex simplicity. Your knowledge and experience is very much appreciated.
Keep informing the people...

[genecrane]

I’m sure people are going to jump all over me for this but here goes: I’m surprised to see him touching the positive while his hand is on the frame and even more surprised to see him touching both terminals at the same time.

[fattireale]

My truck has two batteries and in haste disconnected both positives then put one back on. When I saw sparks I took the negative off both then put the positives on both then both negatives. I clearly wasn’t thinking. So now the instruments and some lights work but it doesn’t crank anymore. No sound at all. I can’t tell which battery cranks but is suspect it’s the passenger side battery. It’s ‘16 titan diesel, was trying to disconnect batteries before swapping out the fuel filters .

[anthonyman]

I was pulling the positive first and saw sparks when touched another nut on the same terminal. Did i fry the old battery cause it won't charge now, barely made it home

[ThatVMiataBruh]

Getting a new battery in my 1125CR is the worst job ever🤣

[emmanuelfelix]

What if you already made the mistake, is there any remedy?

[ambesa]

i mistakenly plugged the negative first and got sparks, when i realized, i disconnected and started with red first and then the negative, and then i had smoke coming from the fuse block and blown the 30a fuse and the negative wire looked not so good at the the fuse terminal.

[Whyyoumadcuz__]

Been having issues with car. I always have to jump it to get it going. Today but accident i took off positive first by accident cause it was late and dark. spark came and car shut off completely. Tried again wouldnt start.

Should i try again tommorow? and yes it is a new battery aswell

[nomob]

Well we just almost caused a fire on my car now it’s really fucked up.