[CA] [CA11] Wiring a new P58 Transducer to an old ST40 Display Unit.

[gnlewis]

Could anyone advise me whether or not it is possible to wire a P58 transom mounted transducer unit to an existing ST40 (Model Ref E22054) stand-alone bi-data display unit ? My old transducer was accidentally damaged (beyond repair) during winter storage and I recently purchased a P58 unit which looked to be an almost identical 200khz replacement. However, I have subsequently discovered that the ST40 display has 8 connectors - 5 for speed and 3 for depth (blue, black and unshielded) while the P58 cable has only 7 wires - 5 for speed but only 2 (just blue and black) for depth. The wire that is 'missing' from the P58 transducer cable wire is labelled as 0 V Shield on the wiring diagram in my ST40 owners handbook.

Thanks for any help / advice that you are able to offer.