2000 Volvo 770 where does this ground wire go?

Discussion in 'Volvo Forum' started by 4vmach1, Apr 3, 2013.

  1. 4vmach1

    4vmach1 Light Load Member

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    Hey guys, I been trying to figure out where this ground wire goes on my dads 2000 Volvo 770. It has a Cummins N14 celect+
    The wire is coming out from the harness where it plugs into the alternator. Any help would be appreciated.

    [​IMG]
     
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  3. Pablo-UA

    Pablo-UA Road Train Member

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    whats the wire #?

    As I can see it is european alternator with brushes.

    There are D+ and W outputs. Sometimes outputs are not used
     
  4. 4vmach1

    4vmach1 Light Load Member

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    Thanks for your response. I will look later today and find out if it has a number. I don't remember seeing one, but I will still double check. I hooked the ground wire on this one spot I found just to test it out and the battery light came on. When I disconnected the wire the battery light went away. So maybe it doesn't use it at all just how you mentioned it..
     
  5. Pablo-UA

    Pablo-UA Road Train Member

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    is the light on when you ground this wire?
     
  6. Pablo-UA

    Pablo-UA Road Train Member

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    if yes, this is D+ wire.
     
  7. 4vmach1

    4vmach1 Light Load Member

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    Yes the light comes on. So I don't need to ground this D+ wire?
     
  8. Pablo-UA

    Pablo-UA Road Train Member

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    usually it is pin on internal voltage regulator. but may be unused on some alternators


    some alternators do not charge w/o D+ till you rev engine up to 1200-1300 rpm

    Just an example of alternator wiring
    2010-02-01_183400_560sl_charging.jpg
     
    4vmach1 Thanks this.
  9. 4vmach1

    4vmach1 Light Load Member

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    Gotcha. Problem is the truck battery keeps dying over night. But the battery light doesn't come on after I use jumper cables to start it up. Alternator seems like it's running fine, but I might have to check it out with a dvm. The battery is reading 12 volts at the moment, but it just won't let the engine turn over.

    edit: alternator is reading 12 volts as well.
     
  10. Pablo-UA

    Pablo-UA Road Train Member

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    use clamp meter and pull fuses one by one to find what drains battery
     
  11. 4vmach1

    4vmach1 Light Load Member

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    Ill try that out thanks, Ill keep you posted soon. I'm actually working on my Mustang this weekend, but I should be heading back to where sits on Monday.
     
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