fuel pump relay?

Hello all, Im a super noob here, so be kind. Im installing an aftermrket fuel system in my car and have an issue with wiring. Basically I have a terminal (switch) on the pump controller that needs a 12+v signal to turn on, and 0 to turn off. My problem is the input signal I want to use for the controller is constantly putting out between 9v (low load) and 14v (high load). So my question is: Is there a relay configuration that I can use to take that 9-14V wire and make it an on/off swtich that either is putting out 12+ volts or nothing? Thanks.

Yes, a standard Tyco Single Pole Double Throw relay will do what you need.  Ground terminal 85, connect your 9 to 14 volt wire to terminal 86.  Terminal 87 should be connected to the battery via a fuse.  Terminal 30 will power your new fuel pump.

Craig on your configuration wouldn't you need 87a to be connected to ground?

It's just the poster's use of "0". Poster, do you mean 0 volts as in "open circuit", i.e. nothing, or do you mean "0" as in ground? I'm assuming the first case is correct and therefore so is Craig.

howie ll wrote: It's just the poster's use of "0". Poster, do you mean 0 volts as in "open circuit", i.e. nothing, or do you mean "0" as in ground? I'm assuming the first case is correct and therefore so is Craig.

Sorry for the confusion. Yes, by "0" I am referring to an open circuit. If I wire the relay according to the first post, what will trigger the relay to close and output the 12v signal? The variable voltage input wire reaching a value ofe 12 or higher?

Yes, keep to Mr. Idiot's answer. Ave 12V+ Bosch/Tyco relay, the coil will act when the the voltage reaches about 7.5V+.

howie ll wrote: Yes, keep to Mr. Idiot's answer. Ave 12V+ Bosch/Tyco relay, the coil will act when the the voltage reaches about 7.5V+.

But the input voltage to the relay will always be 9v minimum. So does that mean the coil will ne constantly triggered?

Maybe a 1K resistor on the trigger wire or sub a 24volt relay just to see.

Or a few diodes to predictably drop the voltage. Maybe a zenor diode if a high drop is needed.

At what voltage will the coil actuate on a 24v relay?