Rally Dash

Hey Guys having trouble with my Rally Dash gauges and lights on my 70 Duster I only have the brake light that comes on on the dash every light on the cra works other than the dash lights including signals on the cluster.
I have a good ground on the dash so that dont apprear to be the issue i have teste all the light bulbs as well as the circuit board all have continuity. the plug on the back has power such as when i put signals on both signal wires have power at the plug. i have power on both wires that bolt to back of cluster also. Any ideas?? I should also mention that when i put the signals on the brake light has a dim flash to it. This makes me think ground but again i seem to have a good dash ground.