1971 Ford Mustang Mach 1 302

The lights on the speedometer and clock went out. I decided to replace them. I removed the gauges and notice a burnt line going down the circuits of the circuit board. I bought a new one and swapped it out. Turned the key and turned on the lights and smoke started coming out of the dash.

I removed the gauges and noticed the same circuit line was burnt again. Any ideas on what to check to see what caused this?

 

Here is a picture of the circuit board

 

Whatever that feeds is shorting to ground. Time to start chasing the spark path.

 

Thanks for the reply. I was thinking it was something on that line but I was not quite sure.