Dear Bruce'ster,

Good p.m. and may this find you well. So far as I know, all 940s are RWD (rear-wheel drive).

I think the problem has to do with the circuit, that runs from the alternator, to the alternator charging light, in the instrument cluster. The "draw" from that lightbulb "stimulates" the alternator to charge. A thin red wire runs from the back of the alternator to the instrument cluster. I do not have a wiring diagram for 1992 model year cars, as I do not own one.

If that circuit is interrupted - broken wire, corroded contact, burned-out bulb, etc. - the alternator will not charge.

The gauges' malfunction suggests that the instrument cluster has wider problems. the easiest solution might be to go to a salvage yard, get an entire cluster, and get the speedometer re-set, so it shows the miles on your car.

You can contact APT Instruments (Bloomington, MN). They charge $50-60 to re-set a speedometer. If you want to do this, I can provide detailed guidance as to how to remove the speedometer from the donor car's cluster. When you get it back from APT, you can put it into the donor car's cluster, and install that cluster, in place of what is likely a failed factory-original cluster.

Sometimes, the flexible circuit card develops micro-cracks. These are far too small to be seen with the unaided eye. Sometimes, corrosion can disrupt a circuit, but the corrosion is so small, that it is hard to find.

Hope this helps.

Yours faithfully,

spook