ejmack1

Inside the tank, which wire is Positive and Negative. There is a black wire and a blue wire.

ejmack1

ttt

ejmack1

Lets try this again... can't believe no one here has installed a fuel pump

rxrotary2_7

the conectors on the end (terminated end *eyes*) should give it away. one is a 7mm and other is an 8mm?? but you can obviously tell the difference just by taking a glance at it.

ejmack1

the bigger one should be the ground... but its a freakin Mazda... who knows... can anyone verify this?

ejmack1

ttt

rxrotary2_7

look on the oem pump itself.... its marked right on there....

ejmack1

lol.... please tell me it aint so

Railgun

Black is ground. It's universal.

edscholl

no, no it's not. and assuming it is can kill ya.
- doesn't matter w/ low voltage wiring (sprinklers, landscaping lights, etc) as much, but white is usually used for ground (and the wiring bundle usually has a black wire as well).
- on electrical outlets in your home black is the LIVE wire, white neutral, and green or bare is ground.

but to the question at hand, the oem fuel pump is marked with a "+" and "-", so take a look on it to determine which is pos and which neg.

Railgun

I wasn't speaking home/commercial wiring. I know that green is ground. You don't always have a 3 wire setup either. In that case, white it hot, not neutral.

Find a black wire in a car, betcha it's probably ground. Key words...IN A CAR.

And where the hell in low v. anything is white used for ground?!?!?!

I have NEVER seen that!

edscholl

gotcha- just when you said it's "universal", it sure as heck didn't sound like you were referring to just cars. =) just wanted to make sure some dumbass didn't get his butt fried because of what he read here. =)

i believe w/ sprinkler wiring, white is practically always used as ground;