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Author Topic:   Wiring Color Code c.1990 Boston Whaler
merc125 posted 02-25-2007 05:06 PM ET (US)   Profile for merc125   Send Email to merc125  
I'm looking for the key to the wiring color code used by Boston Whaler, namely black with a purple or violet tracer. Thanks Marty D
Chuck Tribolet posted 02-25-2007 05:18 PM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
There's a chart at

but the box for that color combo is empty. From what the other
black wires are, I'd guess it's probably a ground, and MAYBE
the ground for one of the things that has a violet wire.
You're probably going to have to trace it back.


merc125 posted 02-25-2007 06:40 PM ET (US)     Profile for merc125  Send Email to merc125     
I found it in the bilge near the transom paired with a solid black ground, not connected to any device. Thanks MartyD
Chuck Tribolet posted 02-25-2007 10:38 PM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
So trace it back, in both directions


merc125 posted 02-26-2007 08:58 PM ET (US)     Profile for merc125  Send Email to merc125     
The black with purple tracer was not connected to any device, at either end. The black was a common ground. the purpose of my post was to determine what accessory at the stern of the craft it might been for. Thank you for your time. MartyD
jimh posted 02-27-2007 12:40 PM ET (US)     Profile for jimh  Send Email to jimh     
The general purpose of conductors with black insulation is for the 12-volt negative circuit. Marking conductors with black insulation with a trace color seems to identify what circuit the 12-volt negative lead could be associated with. The color VIOLET is associated with the 12-volt positive circuit that is switched by the engine ignition key switch. One could reasonably conclude that a conductor with black insulation and violet tracer would be a 12-volt negative lead associated with the ignition key switch. Perhaps it was for use with twin engine installations. With twin engines, there is often some more complicated wiring of the key switches, the safety lanyard switches, and this may require use of an isolated ground return. That is my best guess.

I do not think you can find a more comprehensive collection of wiring color code information for marine and outboard motors anywhere else on the internet than on CONTINUOUSWAVE.

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