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Old 09-12-2017, 04:12 PM
leok leok is online now
 
Join Date: Apr 2013
Location: Clarkston, MI
Posts: 210
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According to the Garmin experts in the class I took. Switching power and ground is about the only way to damage a unit with 12 Volts. They also warned us about powering up for the first time on a battery that might die during the initial software loading.

Get the manuals and follow them. They have detailed instructions on powering the units up for the first time.
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