My fundamental problem is making the transition from the old Nav III harness to the new Nav V harness. I haven't tried to mount the Nav V mount yet, but I have read that the bolt pattern is the same and all that is required are some offsets for clearance. I think the real issue here is electrical and not mechanical.
If anyone has any idea what the pin-outs are for these harnesses, I will be eternally grateful.
And if you know a source for the female connector to the "other" connector on the Nav V harness, I will be ecstatic!
I believe the power harness for the NAV III had +V on the pin in the pink side of the plastic, GND on the pin opposite it and the third pin (middle and offset from the other two) was unused. And I think the two pins in the "other" connector were signal and common for the audio, but that is just a guess.
I was hoping that the Nav V had the same power and ground and used the 3rd pin for the whiz wheel interface and used the "other" connector again for audio. That would make conversion fairly easy and just require finding the appropriate connectors, assuming, of course, electrical compatibility. Worst case, I cut off the OEM connectors and use Weatherpack connectors which are readily available and very high quality.
Worst case would be that the Nav V uses the 3rd pin in the power connector for the audio output and uses the two-pin "other" connector for the wiz wheel/canbus interface. This would definitely require some cutting and splicing. However, it generally is considered bad design to run low-voltage audio signals right beside and through the same connector as the power source.
If I can't find any information as to the function of these pins. I will probably try to connect an iPhone audio jack to the "other" connector on the stingray and see if this is a voice input to the VOICE II intercom. I may then try the opposite with the Nav V and see if I can connect the "other" connector to a speaker and see if any voice commands come out. Trouble is, without knowing the characteristics of the outputs and inputs, it is a crap shoot as to whether it will work. Unlikely to cause damage, but that is always a risk also.
Most audio signals are very low voltage (1 volt or less), but the impedances can vary. 4, 8 and 16 ohms are common and I have read that the iphone is close to 4 (some have said 4.5, but that is hair splitting for all practical purposes). Unfortunately, I know nothing about how the Nav 5 outputs audio or how the VOICE II receives it.
Anyone got any information on these devices?
The picture on the right shows the stingray end of both wiring harnesses with the old Nav III on top and the Nav V on bottom. Power connector looks to be the same, but the "other" two-pin connectors is, of course, much different.