Completely forgot this thread.
Finally managed to get the tacho working again. I'm not sure which of the following I did that solved the problem but she is operational again:
1. Found that the electrical connections in the plastic screw on cap that go onto the sender were pushed too far into the plastic casing. So when I screwed the cap onto the sender, one of the metal connections wasnt mating properly. Pulled the connecter in question forward a little and crimped it tighter within the casing.
2. Roughed up the end of the sender that screws into the gearbox with sandpaper
3. Found a wire that had been rubbing against a chassis cross member....possibly this was contributing to the 24v vs 12v power problem i talked about earlier.......one of the three wires in the odometer cable was down to about 3 strands of wire so I did a chop and chock job.
One of those 3 problems solved it. Happy days!
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