Positive pump wire
 

So maybe it's just the time of day or something; but I can't figure out which wire is the positive side of the fuel pump. I have Black, Black/White, Blue, and Red.

I'm thinking it's the Black/White one. Can anyone verify for me?

(S4 NA)

http://foxed.ca/foxed/index.php?page...nual#secondgen

from the '88 FSM

http://rotarycarclub.com/rotary_foru...0&d=1302300810

I would remove the circuit opening relay and replace it with a Bosch cube relay. Just tie the positive of the coil and the common to the B/W wire and the blue to the Normally-Open contacts, then connect the fuel pump relay output from your Haltech to the negative of the coil.

I'm thinking of just doing it direct (as per haltech's instructions). I'll eventually hunt down that relay and get it removed (as I don't really need it anymore).

Blue

Blue on the female side of things. B/W on the male. :beatdeadhorse5:

Blue coming out of the tank... that's what you're looking for because you're rewiring the whole circuit and all the way back to that connector and replacing that connector right?

The connector from above shows blue which connects to b/w on the pump (I don't know why it does, but it does).

Much like the ignition switch pigtail lead wires don't match the colors of the plug it attaches to on the front harness. Mazda does not seem to recognize the colors of suppliers/vendors wiring/pigtails. So you end up with Mazda fuel pump harness plug having the Blue power wire being connected to a suppliers Black/White power wire. Talking series four car here, not series five.