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  1. 03-27-2024, 01:59 PM #1
    lpugh
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    What are these wire's for?

    Connected to the diagnostic connector, the other ends no connected!
    This is the same motor in the post about no RPM reading on the vessel view mobile.
    Thank You Leon Pugh
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  2. EuropeanAM
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    Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #2 03-27-2024, 03:52 PM
    SB 2000-11 describes these two wires as being used for the older "Smart Tach and Speed" instruments, which carried CAN-P data on the tachometer and trim sender wires of the keyswitch harness (we fondly refer to them as the old "stupid-craft").

    Make sure the male and female gray wires in the engine harness are connected together (not unplugged) and get a terminating resistor to put on the VVM. That will likely resolve your difficulties.


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