87 Cab temp/gas gauge inop,not the V-stabilizer
 

Fuel and temp gauge do not work. Voltage test at voltage stabilizer is within spec at 9.9. I went ahead and replaced the stabilizer with the new style, (installs upside down with brass ring and longer screw) .
I have visualloy inspected the printed circuit and wires to fuse panel but have not located a break.
Any tips welcomed.