another tach question - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• another tach question by shegel on 05 Jun, 2009 15:25
• when i turn the headlights on in my newly aquired 86 jetta turbodiesel the tach signal dies. this also happens when i hit the high beam switch when the headlights are not on. it goes from 1000 to zero like its grounding or somthing. ... I am pretty mechanicly inclined to begin with and can troubleshoot most things but am unsure what to start with on this problem. i would pully meter out but i have to go to work soon  
  
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  thanks,
  steve
• #1 by JerryGTD on 05 Jun, 2009 15:30
• Sounds like a loose alternator belt to me.
• #2 by shegel on 05 Jun, 2009 21:57
• belts tight.