Skip the auto shop - Our mechanics make house calls

Q: My vehicle has electrical issues after replacing the wiper motor.

asked by on

I TOOK ME CAR TO THE DEALER FOR ROUTINE CHECK, KNOWING THERE WAS A PROBLEM WITH WINDSHIELD WIPERS. WAS TOLD THERE WAS CORROSION AND THE SYSTEM NEEDED TO BE CHANGED- WHICH I APPROVED. HOWEVER 2 DAYS LATER I GET A CALL SAYING THE MOTOR WOULD NOT START ALTHOUGH THEY HAD REPLACED THE BATTERY WITHIN LAST 8 MONTHS. I AM NOW BEING TOLD SOMETHING IS DRAINING THE BATTERY AND THEY ARE DOING A DIAGNOSTIC. IS IT POSSIBLE TYHAST IN REPLACEMENT OF WIPER SYSTEM, THEY LEFT SOMETHING ON CAUSING THE BATTERY TO BE DRAINED?

My car has 120000 miles.
My car has an automatic transmission.

Hi there. There is a parasitic draw that is making your battery go dead. First, charge up the battery to the maximum voltage that it will go to, ie: 12.4 volts to 12.6 volts. Anything under 12.4 volts, then the battery will need replaced. Then turn on the key and start the vehicle up. Turn on everything in your car one thing at a time. Then turn everything off in your car. Shut off the engine and pull out the key. Shut the door and make sure that all of the doors are shut. Remove the negative (-) battery cable and put a digital meter from the cable to the negative (-) battery post. Check to see if there is a draw of battery voltage on the meter of more than 5 volts, like 7 volts or 12.6 volts. This would indicate that something is shorting to ground. If the vehicle was working fine before the wiper blade issue, then check the circuits with the wiper blade motor and see if the power goes away by disconnecting the wiper blade motor. If it does, then check the circuit for power and see where it’s getting the power and if the circuit is shorted to ground. It’s possible that the circuit was shorted to ground before causing the wiper system to malfunction. Locate the connection to the other end of the wires and check for battery power. If there is no battery power, then visually look for any melted wires that could lead to a short in your wiper system. If the wiper system is not having an electrical issue, then unplug one fuse at a time and see if the voltage goes away. What ever makes the voltage go away, fix that circuit or replace the part that could cause the issue. If you need further assistance troubleshooting your vehicle, then seek out a technician, such as one from Your Mechanic, that can assist you with the draw upon your battery.

Was this answer helpful?

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

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: I just purchase the C230 and the light comes on displaying the battey and oil change the dealership said that the battery is new w

If your battery light is illuminated, it is possible that your alternator could have failed. I would recommend having the alternator tested to determine if it is producing enough voltage to properly charge the battery. If not, I would recommend...

Q: I have a Kia Ceed. Petrol battery is dead. Can a diesel battery fit?

Hi, thanks for your question. I'd be happy to help. The diesel battery may be heavy duty compared to the petrol engine. The two batteries should be compared for size and height to be the same and the terminals should...

Q: Hi, I have a shifting problem with my car. When I shift in between gears it jerks. Plus I can't go past 60 mph.

Anytime your vehicle is not shifting or loses power there is a major problem and should be looked at as soon as possible to prevent additional damage to other components. I would recommend limited driving at speeds below 50 mph...

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...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...