Cruise control won’t come on

use the accelerator pedal..???

seriously though, maybe it could be a bad brake light switch, bad clutch pedal switch (if not an automatic), could be a blown fuse or bad relay, so check the fuses, relays, check to see if your brakes lights stay on, make sure you clutch pedal is not hanging lower than normal (if you have a clutch pedal)

i'm outta ideas on what else to check.

 

There’s a way to bypass the ecm if I’m not mistaken.

turn cruise on and off 3 times and keep it on on the 4 time.

it should let you bypass the active braking and radar devices.

search YouTube as well for ways to bypass the stupid sensors.

 

turn off your windshield wipers

 

If your truck is a manual tranny, make sure the clutch pedal isn't sagging. Also check to see if the brake pedal is sagging. Try this. With cruise control off, put your foor under the clutch pedal or the brake pedal. With your foot pull the clutch/brake pedal up. Try activating the cruise control.

 

SAME Shop??
If So, WHY?
- - - -

 

On my freightliner when that happens I will tap the brake pedal twice then pull it towards me the reset the switch. Works everytime

 

Press Firmly on the cruise button, apply pressure if needed. I had the same issue. Push hard on cruise button on steering wheel

 

My automatic, you can't have the exhaust brake on, or cruise won't work. I am sure you have tried this, but other than what has been posted, that's all I can think of. Does the exhaust brake work correctly?