Alternator not charging, and no battery light. - Troubleshooting - VWDiesel.net The IDI, TDI, and mTDI source.

• Alternator not charging, and no battery light. by Tom77 on 03 Jul, 2012 14:19
• The car is a 82 Rabbit Diesel, the alternator is good, was tested, the battery light on the dash doesn't come on, even when the key is on, only the oil light.
  I replaced the dash, but same thing, no light, and no charge.
  Any suggestion?
  
  Thanks.
• #1 by R.O.R-2.0 on 03 Jul, 2012 15:29
• the only time the light doesnt come on (from my experiences) is because the exciter wire is un-hooked from the alt, or if the light is burnt out..
  
  have you confirmed with a volt meter that there is no charge coming from the alt?
• #2 by Tom77 on 04 Jul, 2012 05:17
• Yes I did, also the alt was tested at two different locations, and passed.
  I don't think is the light, because I replaced the dash, with a spare.
  Probably is what you said, the wire is un-hooked somewhere.
  I did a continuity test from the rubber plug that goes to the alt, to the plug in the dash, the only one that failed was the blue wire.
  Can I bypass the blue wire?
  If so, what I have to do?
  
  Thanks
• #3 by R.O.R-2.0 on 04 Jul, 2012 12:03
• Quote from: Tom77 on 04 Jul, 2012 05:17

  Yes I did, also the alt was tested at two different locations, and passed.
  I don't think is the light, because I replaced the dash, with a spare.
  Probably is what you said, the wire is un-hooked somewhere.
  I did a continuity test from the rubber plug that goes to the alt, to the plug in the dash, the only one that failed was the blue wire.
  Can I bypass the blue wire?
  If so, what I have to do?
  
  Thanks
  

  
  that blue wire is what operates the light. if the blue doesnt work, the light doesnt work..