Couple of fuel system related questions Options

[CelicaB]

Trying to get a celica back on the road, does anyone know what size this fitting is? It's the one that goes into the bottom of the stock fuel filter.



Also does anyone have a wiring diagram for the stock fuel pump and it's plug, or at least what each wire color does? Car is a 94 GT





Thanks in advance!!

[czwalga]

Don't have the wiring diagram with me since i'm at work, but just looking at the plug most likely:

the big blue wire is fuel pump pos+
gray fuel pump neg.

y/b 12v pos
br 12v neg
y/r fuel level variable voltage.



y/b and y/r may be switched can't tell just from the colors, but if its wired like a pot, thats the order it would be.

This post has been edited by czwalga: Jul 15, 2013 - 9:16 AM

[CelicaB]

the big blue wire is fuel pump pos+
white with black is fuel pump neg. (it's just bad lighting)

y/b 12v pos
br 12v neg
y/r fuel level variable voltage.



y/b and y/r may be switched can't tell just from the colors, but if its wired like a pot, thats the order it would be.

Thank you!!
Fixed one wire color in case someone else can use this info in the future. Also found a pretty good pic of the stock pump and sending unit.




Does anyone know about the fitting into the bottom of the stock fuel filter?

[czwalga]

FYI my post was wrong. Brown goes to fuel level low light.

[CelicaB]

FYI my post was wrong. Brown goes to fuel level low light.

Cool, thank you!

Also for anyone else the fitting that goes into the bottom of the stock fuel filter is 14x1.5 I just couldn't find my thread pitch guage haha