Can we do this? (aka The DIY Cruise Control Thread)

[Sir A.Y. Atoyot]

Originally Posted by CTScott

Or you could add four momentary switches (On/Off, Set, Up, Down) to the dash like I am going to do to save on buying the stalk and on having to pull the airbag.

Good luck with that - those functions on the stock switch work through resistors and involve the extremely expensive central engine computer (ECM). The resistors are the squiggly lines in the diagram. It's important to know the exact values to make it work right. A familiarity with Ohm's Law would help, too.

[CTScott]

Originally Posted by Sir A.Y. Atoyot

Good luck with that - those functions on the stock switch work through resistors and involve the extremely expensive central engine computer (ECM). The resistors are the squiggly lines in the diagram. It's important to know the exact values to make it work right.

Correct. The resistor values are:
216 to 264 ohms for one between resume and on/off
351 to 426 ohms for the one between set and resume
819 to 1001 ohms for the one between set and cancel

This is a standard way of having multiple inputs on a single wire.

[CTScott]

Originally Posted by PK198105

you realize CTScott is an electrical engineer right and Im a electrical engineering tech


BTW CTScott i was thinking the same thing about the switches except Im thinking of mounting them in my door armrest right above the handle, i will most likely canibalize the stalk and use jumper wires and a LED to show the status

I am soldering up a two button test rig right now. I have a Karate class at 8, so I am hoping to test on/off and Set on my way there...