As a result of installing an ECM from an Automatic car, my Solstice wouldn’t start. I knew I was going to get the ECM re-flashed but I needed for my wife to be able to start it to take it to the dealer and I had kind of wanted to do a push to start mod anyway.
Now this isn’t a true keyless mod and yes there are those that would say it is just silly to do this mod if you still have to have the key anyway. They may be correct but hey, it’s my car and I will mod it as I see fit. Although I do have a purpose for it now, given my ECM won’t send the ground signal to allow me to start the car. Even after I have the ECM re-flashed and you can start it with the key, I may disable that function so that the push button is somewhat of an added security level. Mainly because it isn’t a huge gaudy button that says start on it!
So let’s start with the schematic. The yellow line is the signal from the ECM to the ground side of relay 34, the crank relay. The red lines indicate the added normally open push button and the built in LED ring. This LED already had a built in resistor for 12V use.
First I removed relay 34 and took the cover off. Then I soldered a wire to the ground side of the coil.
Then I notched the relay cover so the wire could come out.
Next I soldered the wires to the NO contacts. At the same time I soldered the LED pins on the switch, one to each side of the contact. So when the switch is open and the clutch is pushed in, 12v + will be on one side of the switch and the other will be grounded. This will cause the LED to light up.
I then re-installed the cover on the relay.
Here is a picture of the relay re-installed in the fuse block.
Here is a short video of how it works.