Here's how I did my TinyTrak3+ install, pretty complicated but it works well.
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First, a couple of facts:
I'm running a Yaesu FT-7900R, which has the mini-DIN plug in back. If your radio requires connecting to the mic and speaker jacks then this will not apply.
I'm driving an older vehicle, a Ford Ranger 4X4. I've already drilled holes for VHF/UHF and HF antennas so I don't have a problem with drilling for a GPS antenna. I prefer not to have GPS coax sneaking in the door.
I retired from the radio business and I've done my share of installs back in the day. My preference is a simple looking installation without a lot of extra switches.
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So I'll walk you through the install from +12V to antenna.?
Bill WA4OPQ