I was wondering if you have to use a relay when making a kill switch for the fuel pump? The reason I am asking this question is because I researched this topic and the information I got kinda confused me!!!

In some there is no relay used, they just have a switch that interrupts the power to the fuel pumps.... and in others there is a relay used that goes back to the alarm!!!

So, my question is can I make a kill switch without using a relay and still be save from any fires???

 

If you want it connected to an alarm you will need a relay if you want to just add a switch a relay is not needed if you install the switch on the ground to the PGM-FI Main Relay or the switch is installed close to the power lead to the fuel pump, [and the switch id "big" enough. a relay would be needed if the wire run to and from the switch is too long. 94

 

ok kool....im just going to use a smalle switch....How long can it be before I have to use a relay?

 

If you are going to install the switch on the ground to the PGM-FI Main Relay then it makes no real diff. on how long the leads are as it is a low current ground, if you want to put it on the fuel pumps power lead then any more then 3' away, [6' of wire] I would install a relay. 94

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fcm &raquo;</TD></TR><TR><TD CLASS="quote">If you want it connected to an alarm you will need a relay if you want to just add a switch a relay is not needed if you install the switch on the ground to the PGM-FI Main Relay or the switch is installed close to the power lead to the fuel pump, [and the switch id "big" enough. a relay would be needed if the wire run to and from the switch is too long. 94</TD></TR></TABLE>

Take this mans advice. Its better then the fuel pump wire kill. I been preaching this for a min and so has fcm. It harder if not inpossiable to bypass a alarm with the main relay killed. This kills the fuel pump, injectors and part of the ecu. Its three in one. Use this with a alarm system and you will have a very protected car.

 

Would you know where i can find a diagram to do that? The reason I'm asking is because I don't want to have a short causing a fire by the fuel pump....and I want to have my car fully protected!!!

 

If you install the switch on the ground for the PGM-FI Main Relay then there is no possibility of either a short or fire as you are dealing with a low current ground.

As for w wiring diagram, it is not needed, cut ground lead install switch, one cut lead to each terminal of a SPST, [on/off] switch.

 

The main realy is near the fuse box under the dash right?

 

That depends on the MM&Y of car. 94

 

Well its a 92 civic hatch si!

 

Then yes, it should be just to the left of fuse box, just above and behind hood release. 94