If you do This your car battery can Explode!

[ronniewilliz]

I did that once on a 24v system an my gosh I'm lucky the battery didn't blow up in my face it was as bright as welding lol. It woke me up that morning

[microfarmers]

Great point! Also the positive battery terminal cover is there to save your life in a car accident. Without it, when your hood crumple or you accidentally drop a wrench on the battery, you can easily start an explosion/fire. After a wreck there is most often a pool of gas, coolant and oil. Last thing you need is sparks.😊

[TheFootballDude]

Just use a digital multimeter and make sure there isn’t a minus sign when you read the voltage! :D

[e.r.videography]

Remove that red cover and throw it away for safety then.

[dustintunis]

I usually look where the wires go, on a lot of cars (most?) there is a small negative cable that splits off and connects to the body inches from the battery. Find that connected to the body and you know it's the ground... Hook up the cables, get a big spark with the last one, look closer and realize it goes to the fuse box, not on the body under it... I did that once, now I look even closer.

[emehlhar]

For Toyota vehicles where the battery is on the driver side, the positive is always on the left. At least that is my experience on my last nine Toyotas.

[lovetolearn]

Good advice. I've actually did the same thing. Someone but the red cap on the negative so now I double check every time.

[dustintunis]

I hooked cables up backwards once in high school. I always look for the small wire going straight to the body and thought I saw it, but it was going to the fuse box. It threw some major sparks, then I double checked myself and switched them, no harm done.

[jerryvelasco]

Maybe put that piece on the positive side for him.
I see it actually broke off from the positive side. If you look at the harness.

[NeedForSpeed.]

I once almost fried my jumpbox trying to jumpstart a John Deere 2240 because initially I saw the battery was hooked backwards, so I turned it around, hooked up the jumpbox, smoke. Turns out the tractor uses a positive ground system.

[jackskerry]

Very interesting & good tip, thank you 👍

[sidewinder]

Thanks for the video but why didn't you just put the red cover onto the positive terminal for the customer? Then, notify the customer

[nottelling]

Brings back bad memories from YEARS ago. After one of our softball games, my wife's car wouldn't start (left her lights on). No biggie as we catch a ride to the house to grab my car and return to jump her battery. Only problem was that it was dark and I ASSUMED that her battery was identical to mine. Nope. After connecting the cable and cranking up my car, she hollers out, "Hey, is there supposed to be smoke?"
I kill my car and jump out to smell something burning. I go to grab my cables and they're hot as hades! It actually burned the rubber around the cables. I didn't realize that her battery terminals were situated differently than mine. I have no idea how I didn't blow the battery up.
Not surprisingly, after I did successfully jump her battery, she started have quirky electrical issues.

[_KID]

At first I thought this was going to be some like next level battery tip thing but he's just saying don't put positive on negative so it's valid but I guess I should also add don't let dirt build up on the top of the battery it just might cause a Channel of current and don't touch a wrench between the two posts like you sometimes see a mechanic do it will spark and that can be dangerous.

Thankfully I've never had a battery explode on me but I'd imagine it could be pretty bad. Some people say the top just explodes off but I wouldn't want to find out.

[kennethtownend]

Did you swop red cover over why was cable truncking frayed (question for curiosity)

[pro]

Positive terminal post are always bigger than the negative ones just look at which one is bigger

[TheEgg]

Before you said anything, I thought "That doesn't look like it should be the positive side."

It's my understanding that cars NEVER put the positive side close to the outside of the car where it is closer to the body/ground. Positive always seems to be put on the side facing the middle of the vehicle.

I haven't checked every vehicle ever made, so I don't know if there are any vehicles where this is not the case. Does anyone know of any vehicles where the positive side of the battery is on the side closer to the body of the vehicle?

[emmanuelgonzalez]

But teach me how to find the issue? How did you identify it?

[Domutt]

Maybe the battery was put in reverse? Those cables can probably stretch a bit further away from the position where the terminals are at when the battery is put in like it is in the video

[biggface]

So it’s safe to say, the red negative is always on the left correct?