Red is minus or plus when installing a car battery?

Other answer:

Rosemarie Holder:
Usually red is positive(+), but not always. I've had more than one vehicle that factory equipped had a red negative cable and black positive. Quickest way to figure it out is follow each of the wires. The negative/ground(-) wire should be pretty short and connect straight to metal, grounding it to the chassis or engine block, or sometimes both, and that should be the only place it goes. The positive(+) cable should go to more places, for instance the alternator, fuse box, starter motor. It might only have one large wire at the battery terminal, but follow it and it should hit a large fuse or terminal and split from there.
thebax2006:
It's always PLUS unless you have a British antique vehicle.
Just in case some idiot changed the battery cables the Black negative cable attaches to the motor block or transmission case and the red positive (plus) goes to the starter motor solenoid.
Skoda John:
Red is always positive on the battery.
On modern cars negative is earth.
Older cars used positive earth.
What colour your cables are can vary
The positive and negative connections are slightly different sizes
FlagMichael:
Red is usually plus, but don't bet on it. My 1984 Nissan 300ZX had an original equipment red negative cable and a black (probably aftermarket) positive cable.
don r:
Usually red is plus.
Staci:
plus………………………………… !
Nicole:
plus………………………………… !
Amber:
plus………………………………… !
Tony:
Plus.

Black is minus. Goes directly to the engine block.

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