Electrical problems

2000 VOLKSWAGEN JETTA
480,000 MILES • 1.9L • 4 CYL • 2WD • MANUAL
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P HUSCH
  • MEMBER
  • 1 POST
When the key is in the glow plug pre-heat position everything seems to work. When the engine is started an audible alarm (single beep)occurs and then the following things cease to function: Tachometer, speedometer, power sunroof, power windows, power mirrors.
Jan 22, 2020 at 6:14 AM
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TOUGHDIVER
  • ✓ASE Certified Mechanic
  • 226 POSTS
  • ASE Certified Mechanic
Hi,

It could be the power reduction relay is shutting down power to the accessories. Load test the battery and check the battery charge rate. It may have a faulty battery or Alternator. I'm attaching repair guides and battery specs. Please let us know if this information was helpful and what fixed your vehicle. Let us know if you need more information.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

https://www.2carpros.com/articles/car-battery-load-test

https://www.2carpros.com/articles/how-to-replace-a-car-battery

https://www.2carpros.com/articles/how-to-replace-an-alternator

Thank you
Joe T.
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Jan 22, 2020 at 11:38 AM
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