Mercury smartcraft tacho
The digital display on my smartcraft engine monitor/tacho is showing no signs of life. Absolutely dead - not a flicker of life! Stripping things back it would appear that the positive connectors in the plns of it's supply harness are corroded away to nearly nothing, but it is possible to get a voltage reading from the red and black wires in the plug that goes into the display unit. I have ordered new pins to fix the harness but have a couple of questions
1 - is it possible to test the display unit just by putting 12 volts through the connector pins on the back of the unit? if it gets voltage without anything else being connected would it show at least an error message or 0? I am suspecting that it is dead but would like to prove it without buying a new one....
2 Why would it only be the positive pins that have rusted away in the connecting plugs? the others seem to be fine...