LED brake bulb replacement problem???

Hi all. I am having a very unusual problem. I installed some replacement LED Tower Brake Light Bulbs on my 2001 Yukon. They work perfectly when the truck is NOT running. They strobe flash when the brakes are pressed and light up normal when the lights are turned on as designed. The problem comes when the truck is RUNNING, I lose the lights but when i press the brake, that works fine, just no lights. Any help on this would be appreciated.

This is what we finally came up with. OK-

I know the problem now.

There is a current regulator inside these leds.

The current regulator will not switch on if the voltage to the dim beam is lower than the voltage to the bright side. When the lights are switched on (in saome vehicles), this lowers the voltage to the dim side of the bulb, and the regulator will not allow any current to pass thru.

We have fixed this on the regular tower bulbs, but the braker style must still have the old circuitry in them.

Hopefully I can get the new ones soon. They are pretty sweet.