How can i turn a DPST button in to a DPDT?
I've replaced all the stock rocker switches in UTV, got all 14 of them done except for one all to Push Buttons. The push buttons are SPDT, "on/on" NC and NO, rated to 5 A. (billetautomotivebuttions.com 22mm)
To get the light to engage with the button, you wire the positive or negative switching, and run it through the light. It works fine for 12 V relays and normal functions, and for the rest of the button locations.
I ran in to an issue. There is a button that goes to the ECU, it is a over ride function, negating the rev limiter to a higher preset, for launch control. This was a kit they had, and as an oversight, the stock rocker was a DPDT switch to achieve this.
It has a 3.3 V to the switch (override), a common GND back to the ECU, and the other lead is 12 V (normal), a same common GND back to the ECU.
I can wire this with one of the NC and NO contacts, and I can get the function to engage on the cluster correctly, on and off no problem, but I can not get the light to engage when on. If i wire the indicator led to the loop, a few things happen,
If I wire the light after engagement, I get override and a faint light, (3.3 V instead of 12 V).
In that same setup, if I engage and disengage the button, the light will come on but cancels out and doesn't engage the override function.
If I wire it to ACC, or the other lead, I can get a light on when off, or light on all the time scenario (duh - right? lol).
So I figured I would try a small 3 V trigger relay, so I can get it to engage the relay when the circuit is connected, and engage the indicator light. Well they all use the same GND ultimately, and I get a light on all the time scenario :(
And they don't make a DPDT button like the other ones to match the panel.
I am getting frustrated because other than the light, the rest of this install is complete, and I'm a few weeks behind.
Any ideas? (They do not make a DPDT button to match the rest in the cluster ...)
Ultimately trying to figure how I should wire the image in the lower right corner? Or if there is a better way to achieve this desired outcome?