I'm unable to use the cruise control. If I hold the button in it seems to want to accelerate but as soon as I release the button it goes back to idle.
I'm not sure where the module that controls this function. If I had to guess I'd feel it was electrical, like maybe the switch on the brake pedal is staying on.
So any help on how to start the diagnosis process./ Thanks. Ed
Note please look at my next post about AM radio noise.
Check the brake pedal switch first, on my 740 I believe it's a vacuum switch, I haven't looked in a while though.
Are your brake lights working?
If not it could be the bulb out relay in the center console, the power for the brake lights is split 3 ways in the relay and I believe the cruise control senses a ground through it.
My relay needed the solder toudhed up on the brake light pins (94 940) I had no brake lights and no cruise control.
Hope this helps
Have something to add? Share your thoughts — no account required.
Ask the community — no account required