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Thread: 280z electrical issue NEED HELP

  1. #1
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    May 2014
    Richmond, VA

    Default 280z electrical issue NEED HELP

    Just bought a 1975 280z and I have electrical issues. I have no power whatsoever no dash lights headlights no buzzer or anything when i hit the key. The battery and the ECU is brand new. I need some help in identifying what the problem might be. Ive been told the ignition relay might be bad but Im not exactly sure where is it is to test is. Any help who be much appreciated.

  2. #2
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    Oct 2009
    Washington County, OR


    Download the Service Manual for your car and check the Body Electrical chapter. Google the term "280z fusible link". Get a multimeter and start using it. It's the best way. Don't assume anything unless you've confirmed it with the meter, many parts get replaced for the wrong reason.

    Datsun Service Manuals - NICOclub
    1976 280Z, with some minor modifications

  3. #3
    Z geek at large FastWoman's Avatar
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    Jul 2009
    Hampton Roads, VA


    Yes, download the service manual. It's absolutely the most important resource you can have. It's light years beyond what you would find in a Haynes or Chilton's. However, the first thing you should check out is fusible links under "body electrical." I'd bet good money you have a bad fusible link.
    My last three sports cars while I still owned all three:

    2001 BMW Z3 Roadster 3.0i soft/hard top (sold)
    1966 Ford Mustang Coupe (sold)
    1978 Datsun 280Z (enjoying very much )

  4. #4
    Registered User ZCurves's Avatar
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    Nov 2004
    Spring, Texas USA



    What DOES work? Do the dome lights work? Do you get the buzzer before attempting to start? After you look at what FastWoman has recommended - Check and then replace ALL of the fuses in the Fuse Block. Inspect ALL of the connections going into the terminal block on the firewall (it is white plastic) and is located under the dash on the passengers side. Also make sure that the big fat white wire is firmly attached to the Pos. side of the battery - this one supplies juice to the EFI system.

    Finally, add the Year and VIN to a signature line when you post. That will help us all in finding the correct solution for your Z.

    Good luck - let us know what you find.
    Last edited by ZCurves; 05-14-2014 at 11:36 AM.
    Andrew (ZCurves)
    1978 Coupe - HLS30-440105
    Spring, Texas USA

    pro deo et patria
    My Albumz

  5. #5
    Registered User siteunseen's Avatar
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    Jul 2011


    1972 240Z #918 New Sight Orange
    1977 280Z #305 Light Blue Metallic
    1972 240Z #110 Persimmons Red

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