1967 Satellite display issue (fuel and heat

Hi guys i am having an issue with my heat and fuel gauges, at the moment they both respond but only partially. Both were working very well prior to resolving another issue, let me explain, for a while i was having and issue with my dash lights being very dim and sometimes both of my signal indicator lights would flicker even though they were not in use. I decided last season to remove the dash and do some cleaning. I removed all of the bulbs and lightly sanded the copper contact with 1000 grit sandpaper, i also cleaned all of the posts and interior of the pin connectors, also the two posts for the main feeds. After reinstalling the dash i found dash light constant and bright and no more issues with indicator lights flickering, all of the gauges and switches are working perfectly except for the fuel and heat. The fuel gauge now fluctuates at times and the heat gauge rises an 1/8 of an inch at the most. I am attaching part of the schematics and a picture of the rear posts on the fuel and heat gauge side, this is a spare i have for repair or parts. Any ideas of what to try without having to completely remove the dash again pete

Author: sendust