Assuming this is a dc motor drive.
The dc motor is reversed by changing polarity; that's a simple fact.
Check incoming polarity red+ black- and compare to output polarity at leads
going to motor (after modules or other controls).Whatever activates the
direction of thrusters should have an effect on reversing of polarity at
this point.
Try that and let us know. mik
"Doug Dotson" dougdotson@NOSPAMcablespeedNOSPAMcom wrote in message
...
My Sidepower bow thruster only runs in one direction. No obvious
relays to replace. Only large potted modules. Anyone know what
may be the problem?

THanks!
Doug
s/v Callista