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I too had the jittery Tacho, and after writing to the manufacturers (Mobelec), they advised taking the supply from the inertia switch. I actually took it from the appropriate place in the fusebox, as I mounted the electronic unit near the relay plate. This cured the problem.
I too had the jittery Tacho, and after writing to the manufacturers (Mobelec), they advised taking the supply from the inertia switch. I actually took it from the appropriate place in the fusebox, as I mounted the electronic unit near the relay plate. This cured the problem.
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