Question about 2000 Volkswagen Passat 4Motion

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Cigarette lighter will not work, so I can't download trouble codes. Fuse is good.

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  • robert_ra691 Jul 23, 2009

    I plug in my OBD II scanner tool into the diagnostics plug on my 2000 Volkswagen Passat & I do not get anything on the screen. It's because the diagnostics system uses the cigarette lighter circuit for it's diagnostics circuit. I get no readout with ignition key on or off.

  • James Ely May 11, 2010

    Do you need the cigarette lighter as a power point for the computer?

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Ok, you need the lighter to power your scanner,got it. Verify that the lighter socket is or is not working by plugging in another component such as a cell phone charger, or checking with volt meter a suggested by Jimmy Nutron. If it does not have power, check the fuse again. Take it out and give a good visual test i.e., the fusible material has not melted or the inside is not cloudy or blackish. Or you can test the fuse for continuity with a multimeter. If you do not own one. The Velleman DVM850BL can be purchased from MCM Electronics for 13.95 and even lower on sale. This by far the best bang for the buck in digital multimeters and even has a transisitor check fuction. Test your circuit by measuring the voltage across the fusebox terminals. It should read about 13 Volts. Zero Volts means there is no voltage from your system and there is an issue like a cut wire or bad fusible link. If this is OK, try removing the lighter adapter and check that the positive spade connector is still in place on the lighter center conductor. Check the ground to chassis which should be less than 0.5 Ohms. I all this fails you can use an alternate 12V DC source. Make sure that the new source is grounded to your vehicle and fused properly to the rating of your scanner. Your scanner's lighter adapter most likely has a fuse built in or an over current protector on the PC board. Safer is better. You can find fused female lighter power adapters at Radio Shack. Connect it staight to your battery so you can use the scanner untill you get to an automotive electrician to shoot the problem further. Best of Luck!

Posted on Jul 26, 2009

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Test to see if you have power they go bad some times use a multimeeter it should read 12v

Posted on Jul 23, 2009

  • jimmy nutron
    jimmy nutron Jul 23, 2009

    test to see if you have power they go bad some times use a multimeeter it should read 12v

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soc21610k
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SOURCE: cigarette lighter stopped

Go to a junk yard and get a new socket. Or disconnect yours and try cleaning it with a wire brush.

Posted on Jun 04, 2009

  • 627 Answers

SOURCE: cigarette lighter won't work fuse ok lighter base ok

I would put a red volt meter lead on the middle and a the black lead on the outside. If it checks above 12 vols, the lighter itself is bad. If no voltage is present, you have to check all the positive wires back to the battery. If those are all working, you have a bad ground.

Posted on Jun 08, 2009

ronald_kate_
  • 111 Answers

SOURCE: The cigarette lighter is not working but fuse is

Hello, try plugging something else into your cigaret lighter and see if it worgs EG: mobli phone charger. If it works it means that you need to replace your cigaret lighter. I hope this helps.

Posted on Nov 07, 2009

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