Sorry to ask a similar question to one asked recently but that one didnt give me an answer. I have an old Veglia Borletti electronic tacho I need to test. It has terminals marked as + - and 1. Does anyone know where those treminals connect to, so I can see if its working?

positive side of coil then ground I believe

All the electric tach's i've had in the past had

+ is +12v feed
- is ground/earth
1 or S is signal and is the -ve connection on the ignition coil

quote:

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Originally posted by PSpirine
All the electric tach's i've had in the past had

+ is +12v feed
- is ground/earth
1 or S is signal and is the -ve connection on the ignition coil

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Cheers, tested and working.