Q: Generator light on when engine is off

asked by on

The generator light is on when the engine is off, and it drains the battery. The light goes off when the engine is started, and I have to disconnect the cable when turned off. I installed a new voltage regulator.

I had a difficult time finding information on this vehicle because my repair database does not go back to 1972. I found a generator wiring schematic on a website. Hopefully it’s correct. The light should come on when the key is turned to the ignition position. It should go out when the vehicle is started or when the vehicle is turned off. If you have already replaced the voltage regulator and the light is still staying on, I would suspect a short between the regulator wiring and warning light. A trained professional, such as one from YourMechanic, will be able to locate any electrical shorts for you to have this problem resolved.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Generator light on when engine is off

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: car over heated

You will need to inspect your radiator to make sure it's not leaking from there and then inspect the hoses. You could have something as small as a bad thermostat or something as big as a bad water pump. I...

Q: My left front tire hits my frame when I turn the wheel left, like it turns too far. Why?

Claimed by Kevin Gainer

Q: I have a 2015 Hyundai Elantra the lights come on but the car wont start just makes a clicking noise.

It could be either; or both. But it seems the car is pretty new to be having that kind of trouble. I wonder if you may have left something turned on or installed some accessory that drained the battery. That...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...