Help with switches for simple circuit

b-rad_76 said:

Hi,

**broken link removed**

I am trying to design a circuit to enable a push start button in my car.

It is easy enough to wire the push button to start the car (see my weird diagram) The problem is, the standard ignition switch disables pin 2 while it is at position 3.

With my setup the ignition switch is set to position 2 and then the momentary switch (purple) connects pin 4, 5 and 1 when depressed (as a substitute to position 3 on the ignition switch). But in turn, pin 2 is not disabled while the momentary switch is depressed.

Is there a way to disable pin 2 with the ignition switch at position 2 while the momentary switch is depressed?

PS FYI pin 2 is disabled while position 3 is activated to reduce current draw by accessories.

Thank you in advance,
Brad

Click to expand...

b-rad_76 said:

Hi

Firstly thank you for all the input.

MrDEB - Yes this would be simple but as DirtyLude noted the accessory function is disabled whilst cranking

TimK - that sounds like a great idea, i was unaware that you could get such a relay, do you know if they are readily available, also would it be able to handle the some 15-40Amps that the ignition circuit can generate?

Gary B - I have limited knowledge in this area, so would you care to elaborate on your suggestion, thanks

Rajaneesh - although i have not tested this voltage, i believe it would be approx 12V as this is the voltage the accessory circuit functions on


Additionally, I was thinking that i could run a small gauge wire from after my momentary switch to a NC relay which be placed between pin 1 and 2 of position 2 of the ignition switch (pin 3 will still recieve power i believe) So that when i push the momentary switch the relay would open the connection to pin 2.. Thoughts?

Thank you,
Brad

Click to expand...

b-rad_76 said:

Hi

Firstly thank you for all the input.

MrDEB - Yes this would be simple but as DirtyLude noted the accessory function is disabled whilst cranking

TimK - that sounds like a great idea, i was unaware that you could get such a relay, do you know if they are readily available, also would it be able to handle the some 15-40Amps that the ignition circuit can generate?

Gary B - I have limited knowledge in this area, so would you care to elaborate on your suggestion, thanks

Rajaneesh - although i have not tested this voltage, i believe it would be approx 12V as this is the voltage the accessory circuit functions on


Additionally, I was thinking that i could run a small gauge wire from after my momentary switch to a NC relay which be placed between pin 1 and 2 of position 2 of the ignition switch (pin 3 will still recieve power i believe) So that when i push the momentary switch the relay would open the connection to pin 2.. Thoughts?

Thank you,
Brad

Click to expand...