Hey Guys---
What im trying to do is find the wire i need to splice inorder to add a switch for my fuel pump so that i can turn it off when the cars parked, so if any fool tries to steal it (kinda like pulling the fuse), it wont run for long. Now ive been looking at the wire diagrams on 12-27 and i think the wire the wire i need is the black and white wire coming from the fuel pump relay to fuse 32. Am i correct?? and will that wire control power to the pump if i put a switch in there? Thanks for your help.
Brett

 

I think you are correct that you could put a switch in the black-white wire. However you can also put switch in the solenoid circuit that controls the fuel pump relay(either in Brown, or Black-Pink wire, page 12-27). Current in solenoid circuit is lower therefore low current switch, probably smaller in size, can be used.
Just a thought.

 

Ok not a bad idea.. the switch i have is rated at 25A and 12 VDC, i think i should be ok considering that the fuse that the black and white wire runs to the fuse is 15A.. right????

 

Yes I think your switch is de-rated enough therefore safe enough.

 

Thanks for your help, now i just have to get into the kick panel and attack that relay. Now maybe you can help with this (im an electronic nOOb. This is the switch i got.... Click here It has 3 prongs to attach the wires to, 1 is for power, 2 is for load and 3 is ground. How would the best way to hook it up be if im putting it onto 1 wire?

 

If you have a multimeter you can measure the Ohms between power and ground (maybe)when you switch it back and forth, and see if it's 0 Ohm and open circuit. If it is then those two prongs are for the fuel pump, no polarity requirement. The third prong is for illumination. I said "maybe" because three names means something to me but not all. I have to see the switch package to confirm the right connection.
I will go to Radio Shack and take a look.

 

Gee Thanks very much! if i had a scanner id show ya the back but i dont.

 

it looks kinda like this
______
| -- | power
| -- | load
| -- | ground
|______|

 

Came back from Radio Shack. Store assistant opened the package and measured it. On the switch body, terminal 1 and 2 is the switch you want to use. Terminal 3 is for LED we (assistant and me) think, but don't know how to connect it. It does not have the circuit drawing (schematic).

Anyway, you probably don't want the LED to light up as this switch is meant to be a hidden one right? So please ignore terminal 3.

 

Yeah i was at radio shack today picking up some terminals, i found the same switch (unlighted) i also went to nissan and talked to a tech, he said just what you said. 1 and 2. He thinks 3 would be just grounded. Thanks for your help very much, couldnt have gotten this far without it