Skip the auto shop - Our mechanics make house calls

Q: A fuse kills the battery when it is left in.

asked by on

When I purchased the car I noticed that the fuse for the cigarette lighter was only halfway in so I inserted it fully in to the fuse box and noticed an under dash light came on. This light never goes off and has an orange wire running directly to the "batt. fused" port. If I leave the cigarette lighter fuse plugged in, the battery dies. If I take it out, I have no cigarette lighter, radio, or hazard lights.

My first question is, should the under dash bulb be there? It doesn't make sense why there would be a bulb under the dash that never turns off.

My second question is, why does the battery die when the cigarette lighter fuse is left plugged in? Is the light bulb drawing enough power to kill the battery?

Note - the battery is a brand new Optima 8022-091-FFP RedTop, the cigarette lighter is brand new and the stereo is currently disconnected but the battery still dies when the fuse is plugged in.

My car has 88000 miles.
My car has an automatic transmission.

Need advice from certified mechanic? Get help now!

Over 1000 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!

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: Cigarette lighter and console lights not working

The circuit for the light in the cigarette lighter is powered by the same power as the instrument cluster lights. If those lights work then you may just have a bulb that is bad and needs replaced. If you would...

Q: How long can a car run like when driving back and forth from work when battery saver mode is on? I plan to have it checked after w

The primary function of the battery is to start the vehicle. Once it is running, the alternator provides the electrical needs of the engine, lights,radio,heater,etc. If the alternator is faulty and not producing power, these systems will draw power from...

Q: Turn signals do not work correctly - 2004 Chevrolet Suburban

This could be an issue with the turn signal/flasher module located in the left I/P fuse box. The output of this assembly should be checked. Also the rear turn signals are hooked up in a rear junction block that also...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...