fuse box
OK great, now for the second answer.....................
Most these cars, the fuel gauge is not fused. Does the temp gauge work?
Unfortunately no one on here seems to be forthcoming with a '73 shop manual, so I'm not POSITIVE but I believe the wiring is closer to 72 than to '74.
You can download a 72 shop manual here. BE AWARE there may be some wiring differences
http://www.forabodiesonly.com/mopar/showthread.php?p=1970088617
From MyMopar, are somewhat usable wiring diagrams, but these are often incomplete and do not show all connectors, etc
http://www.mymopar.com/index.php?pid=31
Two diagrams:
http://www.mymopar.com/downloads/1973/73ValiantA.jpg
http://www.mymopar.com/downloads/1973/73ValiantB.jpg
Notice that the above diagrams, diagram B near top, just show a connector for the cluster and does not show the cluster wiring.
Below is a screen shot of the cluster from the '72 manual which you can download, from page 8-151. No follow along. At the top center find VOLTAGE LIMITER. This is a sort of regulator unit which powers the fuel / temp gauge, and the oil gauge if you have a Rally dash. If you DO have a Rally dash this limiter will be built into / part of the fuel gauge. If you do NOT have a Rally cluster, it will be a little plug - in box which plugs into the back of the cluster.
Notice the "12V" terminal on the bottom of the cluster, follow this to the cluster connector, and down and off to the left G5-20DBL is the wire no. G5 is an arbitrary circuit no. ..... 20 is the wire gauge.....and DBL is the color....Dark BLue
Now, this G5-20DBL you have to follow on the rest of the diagram which is page 8-150 SEE POST BELOW
