Tach Dash Lighting Problem

[rsavage]

I put on new bezel and painted up the needles on the recent tach dash I picked up. Put the speedo from my regular dash in it and put the "new" tach dash in the 70 4X4. Ran a separate ground from the tach. Tack and all gauges worked well. However, I only have a single dash light on the right side-no others will light up. Only the left turn signal will light up when activated, not the right. Changed out the bulbs. No difference. Put my other new refurbished tach dash that I am going to use in the Blazer and it did the same thing. Put the original dash in and had all the lights. Anyone have any ideas?
*Note: the old dash was a dash with gauges and I checked the plug and it is wired correctly for a cluster with gauges.