1991 tach quit

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Joined
Apr 17, 2016
Threads
8
Messages
35
Location
arkansas
i changed spark plugs last sunday afternoon, and now the tach in dash quit working. anybody got any ideas what or what i messed up when doing that job? help appreciated
 
The tach signal comes from the igniter (solid black wire). Obviously the igniter still works or the engine wouldn't run.
The igniter lives with the ignition coil on the right fender, and there are no connections other than at the igniter and the back of the cluster.
 
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