850Merc
Petty Officer 1st Class
- Joined
- Aug 16, 2012
- Messages
- 333
I think I see the problem. Another POBI - He used an extension cord the connect the tach and control. That's why the W-B-G wires. :facepalm:
Is the plug still connected to the tach, the white and black wires? Has the tach worked?
What you could do is hook up a battery and put a meter on the three leads from the plug. One should have 12V with the key on, one should have a short to ground and the other should be open - the tach signal.
On the two wires into the tach, I think I see some makings or writing. Do the white and black out of the plug have the same markings? Is the tach a Merc tach?
If you put a damp cloth on that decal and iron it out smooth and then take a good quality photo of it, you can go to this website and make your own decal very inexpensively.
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I did and they turned out great!!!