Gas Gauge Thoughts....

So, I just dodged a bullet with a failing radiator. Noticed a bit of coolant on the driveway, the next day a small puddle. Put it in the garage, jacked it up and the trans cooler fitting was leaking. Put pliers on the hose clamp and the whole nipple came off the radiator. Both coolant and trans fluid look good so I caught it before they mixed.

I put a new radiator in, put it all back together and reattached the battery. Now the fuel gauge doesn't work. I figure it is a bad ground somewhere, as it was working before I disconnected the battery. The other gauges seem to be working fine so I don't think it is a ground to the cluster itself.

Thoughts?

Greg