Skip the auto shop - Our mechanics make house calls

Q: Hooked up battery cables to wrong car when jumping it

asked by on

My friends car had a dead battery so she and I looked online to figure out how to connect the jumper cables. We ended up attaching the cables to the wrong car in that we attached both the pos and neg cables to the dead car's battery and attached the positive cable to the pos battery spot and the negative cable to a metal piece in the car with the working battery. It ran for about 2 minutes before we realized the mix up. Now the car with the working battery still runs but makes a clicking/vibrating noise when it is stopped and/or parked and the car is on.

You may have damaged the car you were jumping from. I have seen alternator, ECM, various relays, and fuses damaged from improper jumping. You should monitor the problem to see if it continues to get worse. If so, have a local expert inspect the clicking noise and pinpoint any appropriate repairs that should be made.

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

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: Hello my silverado lights flicker an go very low all my gauges down to 0 then it stalls. The alternator checked out good.

Hi there. Check the battery for a full charge. A full charge (100%) on a battery is 12.6 volts and a 75% charged battery is 12.4 volts. Anything under that voltage, the battery would need charged. For your vehicle, the...

Q: 1994 Chevy C1500 won't start even when jumped

Either your battery is discharged to the point it won't take a jump or your battery cables are loose/damaged/corroded. If the vehicle has no lights whatsoever and it won't crank, the problem definitely has to do with the battery. A...

Q: When I start the Jeep I hear a clicking noise once I turn the ignition , it wouldn't start til I pushed the accelerator

Hi There, It sounds like you may have a weak battery or potentially a faulty starter solenoid. Generally, pressing the accelerator makes no difference on today's modern vehicles due to the throttle by wire technology cars are equipped with. The...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
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...