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post #1 of 7 (permalink) Old 02-18-2019, 10:36 AM Thread Starter
 
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Electric drive smart wiring

Does anyone know if an electric drive smart is earthed like a standard car? Ie is the body the earth ? Trying to wire a power module for my dash cam but have no clue and don't want to damage anything.
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post #2 of 7 (permalink) Old 02-18-2019, 01:19 PM
 
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I think I recall seeing an earth (ground) connection to the car body in the 12 volt battery compartment. Test it with a voltmeter to be sure - say between the center of the cigarette lighter plug to a metal part connected to the body.

The high voltage traction battery, of course, is not chassis-grounded.
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post #3 of 7 (permalink) Old 02-18-2019, 01:44 PM
 
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The Smart chassis is electrically grounded to the low voltage battery just like a conventional car (absent some mostly 40+ year old examples).
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post #4 of 7 (permalink) Old 02-21-2019, 07:14 PM
 
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Go to your nearest auto parts store and get whoever does the testing to see if it's positive or negative earth.
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post #5 of 7 (permalink) Old 02-22-2019, 05:27 PM
 
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The Smart is negative to the chassis. A simple inspection of the battery compartment and what the negative post is connected to will confirm it.
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post #6 of 7 (permalink) Old 02-22-2019, 05:41 PM
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Don't know of any current cars using a positive ground system.....
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post #7 of 7 (permalink) Old 03-21-2019, 07:31 AM
 
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I read an article a few years ago about how to properly jump a vehicle and it mentioned that there were a few old pickup trucks (70's) designed that way.
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