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Did I fry my Garmin VHF 100, and can it be fixed?

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Did I fry my Garmin VHF 100, and can it be fixed?

Old 10-30-2017, 05:59 PM
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Default Did I fry my Garmin VHF 100, and can it be fixed?

I made mistake of switching from battery 1 to battery 2 by going past off (rather than "both"), so the boat power was shut off momentarily and immediately restored. After that, I started having issues with my Garmin VHF100 where it wouldn't turn on occasionally, and now I can't get it to turn on ever.

I pulled the radio and checked the voltage. I disconnected the power from the radio and checked the feed from the battery. Without the radio connected, the line is getting full voltage (~12-13v). I reconnected the power to the VHF radio and rechecked the voltage. The line is only getting 3.4v. My thought is that something within the radio is drawing/pulling/stealing 9-10v and not allwoing the full 12v to power the radio.

Questions:
1) Is it possible to fry a radio by accidentally switching the battery the way I did?
2) Is this repairable?
3) Any other suggestions of things to check?
Old 10-30-2017, 06:07 PM
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Switching batteries should NOT normally cause any damage to electronics. So I doubt it's the radio itself.

Double check your ground wire. A poor/corroded/loose connection will give you the same symptoms--full voltage with no power draw, and low voltage when drawing power.

I will bet you have a bad connection in the circuit to the radio and the radio is fine. Trace the circuit and fix any questionable connections.
Old 10-30-2017, 06:23 PM
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Thank you for the tip! I thought the ground was stable, but I'll check it again & try a different location this week.
Old 10-30-2017, 06:34 PM
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Run new temporary power to the radio to verify it's not the problem.
Old 10-30-2017, 06:54 PM
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Good idea. I'll try that too.
Thanks again for the tips!
Old 10-30-2017, 09:43 PM
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if you're measuing 3.4v outside the radio. and a fuse is not blowing. the issue is in the wiring. not the radio.
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Old 10-31-2017, 06:10 AM
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That's great to hear! thanks smac999. I'm going to try running new temp wires as Bouy Scout suggested and I'll let y'all know what happens.
Old 11-02-2017, 11:56 AM
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What did we do before the internet & forums like this?
Problem solved and it was exactly what you described. It was a loose ground and an easy fix.
Thank you all!!
Old 11-02-2017, 02:50 PM
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Glad you figured it out!

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