I don't know about your specific problem but I know that newer cars
with CAN technology do not like the typical LED bulbs due to them
being such low consumers of electricity.  They make special ones with
built in resistors to solve that problem.  You can probably buy the
resistors separately.
Edward

At 07:43 PM 8/10/2013, WILLIAM WITZ wrote:
>Hi all, I installed Led brake lamps on my van I really like the way
>they light up the rear, folks can see that your Brake lights are
>indeed on even in the day time if they are awake. My only problem
>with them is that now my cruise control will not work, is this
>because the control unit is not seeing the ground on the brake
>lamps?  Is it not seeing the ground because they draw so little
>power? If I install a relay up in the front and wire it to the
>ground will this solve the problem?  This seems to be the summer of
>my Westy discontent I am all so do for a transmission rebuild and my
>audio project is not resolved . Looking forward to some camping in
>September on the coast of California and Oregon when all of this is
>repaired. Thanks for your input. Bill Witz 84 Westy Tiico