Push Button Start System

ctuinstra

Well-Known Member
Actually never mind I think I see it. You have wire 5 connected to wire 6 directly until the start button is depressed, changing the resistance of wire 6 and starting it. I think.
Correct. The WH/BK (6) is a 5v reference supplied to the BCM WH (5) while in the RUN mode. Then in order to command a start, the 5V is reduced down by the 1.5K ohm resistor. When the BCM sees this lower specific voltage, it will begin the START sequence. After the command is sent, the WH (5) will go back the RUN status.
 

ctuinstra

Well-Known Member
This is very helpful, thanks. I’m working on this now and it will be very basic. No key fob, just an ACC switch, IGN-run switch, and push button start.

I just don’t understand what your “run” relay is doing in the above schematic. Once I switch pins 4&5 to 12V it should be ready to start. Pin 30 of the “start” relay to pin 6 of the wiring plug should utilize your 1.5k resistor and run the starter. What am I missing?
Did you get it wired up successfully?
 

DCMoney

Well-Known Member
Chad you still happy with the push button start? No issues with it? I was getting ready to purchase the kit and relay.
 

ctuinstra

Well-Known Member
Chad you still happy with the push button start? No issues with it? I was getting ready to purchase the kit and relay.
Yes! Actually it’s been working very well. The only thing is that you have to either keep the keys out of range when the car is not in use or lock it. If the keys are just tossed in the seat, it will see it as being in range and activates the system and can drain the battery if the car sits for a long time.

Really like it, it’s been working well.
 

DCMoney

Well-Known Member
Yes! Actually it’s been working very well. The only thing is that you have to either keep the keys out of range when the car is not in use or lock it. If the keys are just tossed in the seat, it will see it as being in range and activates the system and can drain the battery if the car sits for a long time.

Really like it, it’s been working well.
Thanks for the feedback! The reviews on amazon are all over the place.
 

Karter2026

Well-Known Member
You mean the reviews like "Do not recommend buying this product. Smoke started pouring out immediately after wiring it up wrong and turning the power on."
The best one I saw was bashing a Craftsman 1/4" impact driver because it would not remove lug nuts on a pickup truck.
 

ctuinstra

Well-Known Member
I was thinking all the same things that you all posted. You have to read through them and weed out most of them. A lot of them didn't even know what they are doing or how to do it.
 

BAR-AIR

Well-Known Member
Good Afternoon,
Disassembled the anti theft on the back of the ignition switch. Seeing that you have the power routing could this be setup as a simple switch? (Probably two switches an accessory power and an ON/START power)... It seems as if once you power the start sequence the ECU? Runs the starter. Not like in the older cars were you could grind the starter if you were to engaged the key after it started. Or am I looking at this wrong?
2B025023-CF5E-47E0-876A-A90DE67997CC.jpeg

THX,
Bruce
 

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