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Author Topic:   OMC Trim/Tilt Control Color Codes
landers_82 posted 05-20-2006 11:58 PM ET (US)   Profile for landers_82   Send Email to landers_82  
I have recently put a 150-HP Evinrude on my boat, and it has an OMC controller with it. When everything was taken off the other boat it all worked, but the wiring for the trim was not permanently placed, so now I am not sure which wires on the controller go where. The controller has three wires coming from the trim switch: black (assuming ground), white, and green. The wiring for the trim has two relays installed on it instead of solenoids. I have searched everywhere and can not find anything to help me with this problem. These wires are somehow supposed to run to the relays and attach to the green and blue wires. I am pretty sure that I have gotten the relay end of it figured out from other forums, but I can not find anything to help me w/ the controller wires. Thanks for any help.
jimh posted 05-21-2006 01:42 AM ET (US)     Profile for jimh  Send Email to jimh     
[This discussion has been moved from THE GAM, an area of general discussion of topics closely related to Boston Whaler boats, to SMALL BOAT ELECTRICAL.]

You can find the color codes used in OMC wiring harnesses in the REFERENCE section:

I do not understand the distinction you are making between a relay and a solenoid. They are generally similar in the electrical function they provide: they allow a small current to control a larger current.

Tom W Clark posted 05-21-2006 12:06 AM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
This may be of some use:

lorin posted 05-21-2006 01:30 AM ET (US)     Profile for lorin  Send Email to lorin     
I don't know what you have there but most trim switches don't have any ground wire. The switch does have 3 wires. Lets call them wires A, B, and C. Wire A is a hot wire. Wire B becomes connected to wire A when you press the up button and it then carries current to a relay switch. Wire C becomes connected to wire A when you press the down button and carries current to the other relay. The usual coloring is red/white (for hot), blue/white (for up), and green/white (for down). The current goes to ground after passing through the relays so there's no ground wire coming out of the trim switch.
jimh posted 05-21-2006 01:48 AM ET (US)     Profile for jimh  Send Email to jimh     
OK--I am going around the website looking for all the places this article was posted and removing them. I will add the various replies to this thread.
Joe Kriz posted 05-21-2006 10:34 AM ET (US)     Profile for Joe Kriz  Send Email to Joe Kriz     
Lorin is correct.

Also, the red wire is the "Center" wire on the switch itself. This wire supplies the power to either the Blue/White or the Green/White whichever way the switch is activated.

jimh posted 05-21-2006 04:22 PM ET (US)     Profile for jimh  Send Email to jimh     
The instant control has wires of BLACK, WHITE, and GREEN, and thus it does not appear to conform to the listed wiring code for OMC devices. Could this wiring coding be an older configuration?
landers_82 posted 05-23-2006 11:23 AM ET (US)     Profile for landers_82  Send Email to landers_82     
I was going by what the control handle read. It has OMC on it, but I am not sure if those can be changed out. I have been looking everywhere and I keep getting the color code for the blue/white green/white style. The wires on this controller are black, white, and green for sure. If this was an instant control, what would the current of each wire be? That helped alot letting me know how hte trim switch is actually supposed to work,thanks. I was thinking that that is how it should work, but I was not absolutely sure how boat controls are supposed to work. I guess I will use a test light to see which wire gets hot when the switch is up and vise versa. Do you have any idea which wire would be the constant hot on the cotrol since I do not have a center red wire? Is there a way to take the switch off and see which wire goes to where on the switch? Thanks for all of the help.
landers_82 posted 05-23-2006 11:30 AM ET (US)     Profile for landers_82  Send Email to landers_82     
I'm sorry. It could be an older configuration, but I am not sure. Thanks again.

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