Joel Schneider I need your help - Page 4 - Mercedes-Benz Forum

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post #31 of 34 (permalink) Old 11-15-2008, 09:33 PM Thread Starter
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Originally Posted by joelschneider View Post
Sorry I did not see this sooner tk. The meter you have there is a a/c votage meter. It will read continuity regardless of what terminal you have it on because it will read through light bulbs circuit boards ect. Your best option would be to get a 12 v dc meter from a hardware store for about $10 or so. Then you can get a reading of which one has 12 volts going to it. If you wire it backwards you will have the hot and nuetral reversed on the 120 volt side of the inverter. If they bonded the ground on the outlet to the nuetral there is a good chance you are going to let the smoke out of it. Once the smoke is let out they do not work so well anymore. Some of the higher quality inverters have overload protection that will shut off power if the current is too high, but I don't think I would risk it. I would get a 12 volt dc meter or run new wires myself. Let me know if you need anything else.
Thanks. I swear something is amiss because I've hooked up invertersd with no problem before. btw, when the "smoke let out" it looked exactly like when the tape self destructed after Phelps got his instructions.

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post #32 of 34 (permalink) Old 11-16-2008, 07:02 AM
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... If you wire it backwards you will have the hot and nuetral reversed on the 120 volt side of the inverter....
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post #33 of 34 (permalink) Old 11-16-2008, 07:10 AM
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DO NOT MIX THE INPUT WITH THE OUTPUT!
They both DO NOT share a common ground. That's what probably fried your toy.
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post #34 of 34 (permalink) Old 11-16-2008, 07:22 AM
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TK, if I'm reading the instruction booklet for your tester correctly, you can't use it the way you are trying to. If you look on the 2nd page where the chart of the LED's behavior is shown, you should get the following:

1. With the red test lead on a + DC wire and the black test lead on chassis ground, the tester will be seeing 12V DC + and the LED's will show up as given in the 4th line of the chart, meaning neon off, Left LED On (the one labelled + DC), right LED off, no movement on scale.
2. With the red test lead on a - DC wire and the black test lead on chassis ground, you'll be measuring continuity (both are at the same potential), and the LED's will show up as given in the 1st line of the chart, which just happens to be the same as condition 1.

The only way to use the tester for what you're intending is to separate the two wires you wish to hook the inverter up to, put a test lead on each, and your tester LED's will behave as shown on line 4 with the LED lit depending on whether the red wire is on + or -.


Last edited by edfreeman; 11-16-2008 at 08:10 AM.
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