When I push my cruise button on the highway my light comes on and says it will not set the cruise control. The ADC does not come on either.

 

Welcome to the 007 club Stephen,

Which codes do you have?
Do you have a CEL turned on?

You will need a code reader for our JLR vehicles. Like iCarSoft LR-II or Autel diagnostic readers, just be sure the one you buy will read the JLR codes.

 

ow old is your battery?
Charge it and see if that works or do a battery reset and see if that clears it.
A lot of electrical gremlins in our cars are due to low voltage/bad battery