I just got this used Scanmaster 2.1 and its hooked up correctly and powers up. Then goes blank with no flashing dots. I checked continuity to the ECU and to the scanmaster board and all is fine. I then found a test for the Scanmaster to see if it would receive data...
Interested in front bumperette rubber strips in good condition(used GM not after market) $20 each
Dash pad no cracks (gray) $120 (if pending sale doesn't go through)
Do you have the Aluminum rear brake drums?
Andy