Automotive Connectors & Polarity

[munu]

With these automotive connectors is there some convention which one is negative and which one positive?

https://www.amazon.com/gp/product/B0...0?ie=UTF8&th=1

[Utimgr]

Polarity is what you decide since there are pins to solder to. Just be consistent of course. And fuse your positive rail.

[munu]

I suspected there is no norm except my norm. I just wanted to make sure before I start creating a bunch of those. Thanks!

[DILA]

I am using A=+ and B=-

[TomL8345]

My method is 1 is always +, and - is always the last pin. (I use 2,3, and 4 pin in my display)

[munu]

My method is 1 is always +, and - is always the last pin. (I use 2,3, and 4 pin in my display)

Hmm, I was going to do this the opposite way, i.e. pin 1 being -/ground/reference and then other pins measuring against pin 1. Is there any particular reason you have + on pin 1 or is this just preference?

[rayhjr]

You set your own standard. Do it how ever it's easier for you to do or remember.
I have 2pin and 3pin. On 2pin I always put V+ or D+ on pin 1 and V- on pin2. On 3pin V+ on pin 1, D+ in the middle pin2, and V- on pin 3. That is my standard and I have it wrote down and stick to it. Some of my connectors don't have numbers so I have a male and female made up with my standard with red, green and black wire to represent V+, D+ and V- so I can refer to it to make sure I put them together properly even without numbers on them.
A bit to get use to but I really like using them on all my pixels.

[TomL8345]

Hmm, I was going to do this the opposite way, i.e. pin 1 being -/ground/reference and then other pins measuring against pin 1. Is there any particular reason you have + on pin 1 or is this just preference?

No reason other than it is easy for me to remember. You just need to be consistent.

[RichieNorthcott]

I use 2, 3 and 4 pin versions of those on my setup. I'm not aware of any specific conventions.

[lancer1991]

I'm using A as positive and landscape wire using the side with labeling as positive. Just the way I figured felt right.