Garmin 178C GPS won't stay powered on

[chumbucket]

I've had that problem with Garmin before. Twice I found that the 12 VDC + pin in the connecter gets pushed in a bit over time causing it to loose power. The new cable should fix it provided all your other connections are good and your battery voltage is okay.

[randlemanboater]

I have had that problem with my Garmin V, I called Garmin and they told me to go to their website and download the software update for my unit, that fixed it.

[tsubaki]

Well, I was gonna suggest checking the voltage to it but I really think you have it solved.
Bunches of the electronic stuff shuts off due to undervoltage.
Also use some dielectric grease at the connections when replacing the cables.

[phatdaddy]

same answers as above, i had the same problem and a new cable solved the issue. i took mine to west marine and had them hook it to a cable on the display unit, when that cured it, i bought the new cable from them.

[Orlando]

if it doesnt check the power coming out at the battery with motor running, its not just low voltage that will cause electronics to shut down, i dont know about garmin in specific, but i know the manual for my lowrance says it will shut off if voltage is high or low

[Blue_Runner]

Good info....thanks for all the replies. I was hoping to report back on the results of the new cable......looked everywhere for that darn thing last night. It isn't lost, I just can't find it! DOH!

[Blue_Runner]

Looking through some old stuff and realized I never reported back on my GPS issue. The issue was the battery did not have enough @ss. Also there is a setting in the GPS that tells it to turn off for low voltage (or something to that effect). I changed that setting and installed a new battery. Absolutely no issues since. The new cable I installed had no impact on the problem but now I have a new cable!