Cruise control install 2009 Yaris 3 door

[CTScott]

Originally Posted by dbielawski

OK..here is where I am at. On the clock spring at 3 wires/pins. 1 for horn, 1 red & 1 black. The cruise switch has a red & black. The black on the cruise is wired to pin 40 on ECM. The red on cruise is wired to red on clock spring. It still does not work. Where exactly do the 2 wires (red & black) of the cruise go? 1 goes to pin 40? One goes to ???? There are only 2 pins on connector D3, not 3???

I was about to say that you need to get your eyes examined in regards to the 2 vs 3 pins on D3, but then I took a look and noticed that on my 08 there are indeed only 2 pins on the clockspring side of that connector.

The other pin for the cruise control is ground. You can simply tie the other wire to the frame of the steering wheel, since it is a chassis ground.