DIY Cruise Control on 07-08 Yaris (step by step)

[CTScott]

Originally Posted by white_rice

Is anyone having an issue with the cruise control indicator light? For some reason my LED doesn't light up when I engage the cruise (OEM stalk) all the time. I will press it again to disengage it and then it comes on. It will do that sometimes, and sometimes it won't come on at all when I engage it, and other times it works properly. At first thought, was thinking it might be a short -- but it only happens when the cruise is either engaged or disengaged as opposed to just randomly coming on or off while driving.

The indicator module detects the voltage change when the on/off switch is pressed. If the connections between the ECM and the stalk are not solid, then the voltage drop across them can cause the module to misinterpret the press.