Question about Eliminator MotoMaster Mobile Power Inverter 175 W

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I need to replace the cigarette lighter plug on my 175 W mobile power inverter. Unfortunately I removed the old plug without checking the connections for polarity. reverse polarity will permanently damage the inverter. Is there a way I can confirm the polarity before connecting the replacement cigarette lighter plug? thanks, Lubo

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  • One wire is the hot and the other wire is the ground.
To find which wire is the ground wire,Take a volt meter and set it on ohms,connect one of volt meters leads to case ground,take the other volt meters lead and touch it to one on the inverters wire,when the needle or digital read out advances or makes a buzzing sound, depending on the type of meter you use,that is the ground side. Black is usually ground and red hot.center connector for lighter socket is the hot side.

Posted on Nov 20, 2009

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It could be any of a number of things, but the first 2 guesses I am going to make are:
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Check the cigarette lighter plug in another "known good" lighter socket / vehicle to help rule out a defective socket. A socket without power indicates anything from needing to change a "simple to replace" fuse - or a bigger problem - damaged wiring in the vehicle (if the socket is used to light cigars & cigarettes - vacuum the socket out to remove ash and tobacco that may collect inside). Trying the GPS elsewhere helps eliminate possible problems with the socket. If it doesn't work elsewhere, depending on the plug that goes into the socket, it too may have a built-in fuse. Check the plug for an exposed fuse - or see if the tip unscrews to provide access to a fuse inside. If unsure, the tech Support people at Garmin are a great source for free help.

Lastly, dirt or grime on the "cradle to GPS" connection or "cable to cradle" connection could be causing the failed connection. In short - carefully inspect all points of connection and remove any deposits found.

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