EFI Four stroke 90hp 2015

by Dave

dual throttle remote control trim/tilt issues. Dual trim switch on throttle handle - trim up starboard engine but not port
- trim down port side but not starboard.
Single trim switches on back of throttle body are the same (i.e. up only on starboard and down only on port). Trim switches on outboards themselves work fine. Think problem lies in sealed black box in harness below.

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