Heater control light.

2009 Star I put new bulbs in the heater control in the cab they still didn't work. I got out the test light and checked for power at the bulbs when I touched the bulb with the test light they worked take the test light away they stop. Bad ground somewhere? Or the heater panel screwed. Why all of a sudden have a grounding issue. I was thinking about running a jumper ground wire to one of the little bulbs to get them to work. But I don't want to Mickey Mouse the wiring. Lol
But it's driving me crazy at night to see Noooooooo lights in the heater control panel.
Any ideas?

 

I go through a lot of the blue lights as well,i putt new light bulbs in the heater panel not sure why they don't work there is power to them,I'm going to dive into it deeper. Thanks for the reply

 

They might have lol