I know I'll probably get flamed on this one but I have an 84 GSL and an 85 GSL, both of them have fuel gauges that don't move, is this a common probelm and how do I fix it. You guys can save me some dismantling time.

 

Its usually corrosion on the sender terminals. You just gotta give it a good sand, and it should come back to life. I've fixed 2 senders like that.

 

Fuel gauges fail for 3 main reasons. The first post is the most likely and easiest fix. The other 2 require disassembly and replacement.

The sending unit. There are fine wires wound around a bar to give the variable resistance signal, they will fray and break. That usually leaves you with a fuel gauge that will give partial or intermittent readings. The low fuel light may or may not work. You have to take the sending unit apart to find the wire. Do a resistance test first.

Mazdatrix has replacements, have a seat before you look up the price.

The gauge itself. Pull the cluster and the gauge and look at the fine white wire that is wound around the bar. If there is a any browning or blackening in the wire, the gauge is toast.

While I was upgrading my gauges with after market ones, I replaced the fuel gauge and sending unit with an Autometer, to match the rest of the new gauges. It eneded up being cheaper than the replacement sender, but a conciderable amount of trial and error work.