im looking to set up a kill switch in my car, but would like to use a momentary switch. im under the assumption this can be done correctly by using a relay? pretty much just want to have to hold the button down in conjuction with turning the car on in order for it to start, while then letting off of the momentary switch.

thanks everyone

 

Bump, me to

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by yehiknowrite &raquo;</TD></TR><TR><TD CLASS="quote">im looking to set up a kill switch in my car, but would like to use a momentary switch. im under the assumption this can be done correctly by using a relay? pretty much just want to have to hold the button down in conjuction with turning the car on in order for it to start, while then letting off of the momentary switch.

thanks everyone </TD></TR></TABLE> Something like this....... http://www.the12volt.com/relays/page2.asp#psk can be used for anything that needs constant power for car to run. 94

BTW not really needed for starter cut.

 

that is way confusing, I think I will just use a relay and a hidden switch for mine, and the same for the starter, only in a different spot.

 

will a 4-prong relay work?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by teg racer 877 &raquo;</TD></TR><TR><TD CLASS="quote">that is way confusing, I think I will just use a relay and a hidden switch for mine, and the same for the starter, only in a different spot.</TD></TR></TABLE> If you use an off/on switch fir the fuel pump power all you need is one relay, and you really don't even need it, a .5A off/on switch on the trigger line from the "ECM" to the fuel pump relays coil will disable the fuel pump a 15A switch on the main fuel pump power and injector relay trigger wire, [same wire, fused in under dash fuse box and hot in run and start] will shut down fuel pump and the injectors, if a relay is used, a smaller switch .5A can be used to trigger the relay.

For starter cut a relay has to be used, [on most cars because of the higher current needed] but you only need a momentary .5A switch to trigger the relay while starting car, unlike any other "cut/kill" circuit the relay on a starter cut only has to be closed during starting, all other "cut/kill" relays have to stay closed while motor is running.

And if you want a "passive" system. [one that arms without you doing anything but turning the ign. off] and it is anything but starter kill, you will need a "latching" relay or use 2 single pole relays SPST, [yehiknowrite] or SPDT, or you can use another common relay used in car audio, [on demo boards] a 4PDT, you need one pole to open the circuit you are "disabling" and one more pole to latch, [keep the relays on] the relays. 94