Turn signal issue has me stumped

So I just put a new center light panel on my truck and I'm having issues with my turn signals. There are 6 lights total, the way I wired it is basically half and half, 3 blink as turnsignals. I got everything wired yesterday and plugged it in and everything workd fine so today i tucked the wires in neatly got everything buttoned up, plugged it in an I have no turn signals. The hazard lights work just fine, blink all 6 lights like it should but no turn signals. I thought it was in the flasher but if I use my test light in place of the lights (getting power & ground from the same spot as the light) the turn signal blinks as it should, plug the light in, nothing. I got power direct from the battery and both the high and low on the light are working. I'm stumped the only thing I can think of is some kind of low voltage safety on the truck? The trucks been sitting a little while in the shop so maybe the batteries are down?

 

My apologies, the truck is a 2007 western star 4900. I also have an LED test light, had to double check that after I read your post to make sure.

 

I unplugged the weatherpack pigtail I have on the panel that disconnects it from the truck and the turn signals will not flash but the hazards still will.

 

Just under 12v is what the dash says

 

I charged the truck overnight so it's good. I tested the voltage at the truck plug and when the turn signal is on I have 4v and it doesn't blink. If I use my test light to jump from the ground to the signal pin it blinks the test light as it should and the voltage jumps to 12v when it's blinking. I'm just confused as to why the test light will blink on the turn signal but the lights won't. It can't be a ground issue because they work as running lights and the power for the signal wires is okay because the 4 ways work using the same wire as the turn.