Learnt something new. The tach has two spade connectors coming off the back next to each other. I thought they were part of the same piece of metal and plugged the red and white wire into the furthest one to the left. Apparently not. I attached the spade to the center most connector and the tach works. So the entire instrument cluster works. thanks to Jeff at odometergears.com for making those great replacement gears. I wonder what teh other connector is for. Next item rear lights.
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Simon 1980 240 320k 19 years. 'White Lightning' 1986 240 (recently adopted)