Quote:
Originally Posted by carpoor
You will have to pull out the cluster to change the bulbs, not a big deal. The sending unit could have a bad ground. If not, it needs to be replaced. PITA - only because you have to drop the tank. Otherwise - very straight forward.
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You really have to pull the cluster on a 69 to change the bulbs? On a 70 pulling the cluster means removing the whole dash. You can get to the bulbs from below or remove the dash pad and go from above, either is a pain but a lot easier than pulling the whole dash.
As carpoor said check the ground on the sending unit in the gas tank. Should be a single wire coming from the top of the tank and screwed to the frame or body, can't remember which.
If you disconnect the sender wire at the tank the gauge should go up past F. If you ground the sender wire the gauge should go down below E. This will at least confirm that the gauge and wiring from the tank are OK. If that checks out OK then it's either the ground to the sender or the sender. What is gauge reading now?