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+--- Thread: Garmin GPSMAP 378/478 data/power cable (/thread-762.html)
- andrewthurman - June 10, 2009
The original connectors on the 378 and 478 were a joke. I broke 3 plugs in one year switching back and forth from the data cable to the cigarette plug adapted. Feed up with buying cables that Garmin would not replace even though they acknowledged the faulty design. I finally figured out a way to make a Y cable for both data and the cigarette plug power. Even the speaker works. Best part is that it costs less than a new cable.
If you are having the same issues drop me an email and I'll send you the instructions. andrewthurman@earthlink.net