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Author Topic:   VHF Radio Power Source
BassinWhaler posted 09-21-2009 11:38 PM ET (US)   Profile for BassinWhaler   Send Email to BassinWhaler  

I'm new to the forum and have just bought a 2008 170 Montauk in which I would like to install a VHF radio. While looking at the wiring inside the console, I noticed four wires leading to nowhere: Wires 513+&- and 514+&- Does anyone know if these two circuits, which do not appear on the wiring diagram on the website, are where BW wires in the optional factory radio and GPS? If so, it would make the install really easy. Do you guys have any suggestions on where I should draw the power for the VHF if 513 and 514 aren't usable? Thanks.

jimh posted 09-22-2009 12:17 AM ET (US)     Profile for jimh  Send Email to jimh     
Please give a URI for the diagram you are making reference to so we might all be able to see it. Thank you.
jimh posted 09-22-2009 12:25 AM ET (US)     Profile for jimh  Send Email to jimh     
You can see the wiring details for the OEM radio installation on a 2008 Boston Whaler 170 MONTAUK from a drawing available at: pdf

That drawing references the main electrical drawing: pdf

I do not see any wire numbers on either of those drawings which correspond to the wire numbers you gave. Also, I do not understand your notation of "+&-" with regard to the wire numbers.

You might examine the diagram to see if the wires you are asking about are wired to the same place in the circuit diagram as the unnumbered wires in the two diagrams I have referenced above which are used to supply power to the OEM VHF radio.

BassinWhaler posted 09-22-2009 12:39 AM ET (US)     Profile for BassinWhaler  Send Email to BassinWhaler     
By 513 +&-, I meant there are two gray wires one labeled 513+ and the other labeled 513- (and the same thing for a set labeled 514), Interestingly, I found both ends of all four wires. One end way up high in the console, the other down low, both on the starboard side of it. My guess is they are speaker wires. I also found the black and red wires for the stereo (wires 510 and 512). That seems like a reasonable place to hook up the VHF and probably the gps/sonar as well. Does anyone see any problem with that arrangement? That would run both through the stereo switch on the dash, which would be cool.
number9 posted 09-22-2009 02:37 AM ET (US)     Profile for number9  Send Email to number9     

The electronics package drawing shows the VHF and finder connected to a power bus bar. The wiring diagram shows the electronics bus bar would be connected to the main breaker and grounds to the ground bus.

It appears from drawings the Whaler design is to keep the electronics package powered 24/7 and not use a separate switch or breaker. Looking at diagrams on their larger boats it's the same design except for using a fuse block for a electronics power bus bar.

Would not recommend using power through the stereo switch because the stereo breaker and switch may not be rated for the load.

This drawing may be of help also. Looks like the breaker box and ground bus bar would be in the lower console area. pdf

jimh posted 09-22-2009 08:26 AM ET (US)     Profile for jimh  Send Email to jimh     
Boston Whaler would never install wiring with GRAY insulation for use in supplying power to a communication radio device. Wiring with GRAY insulation is generally used to supply power to navigation lighting.

These unused wires in your boat do not sound like they are intended as branch circuits of the power distribution for navigation lighting. You assessment that they may be speaker wires is likely correct.

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