2015-Impala
Member
I have a 12 head all blue w TD XLP. Everything works all wires and lights except the blue warning wire will not make it flash. I've went thru the test and every head will turn on it's just the blue warning wire will not work. anyone who knows whats wrong or how to fix replace ect would be greatly appreciated. Also if new io board price is known please let me know or if i should find a cheap one and swap boards. thank you everyone