Skip the auto shop - Our mechanics make house calls

Q: i replaced my alternater and battery and now my locks wont work and my radio wont turn off. what can i do?

asked by on

i replaced my alternater and battery and now my locks wont work and my radio wont turn off. what can i do?

My car has 122000 miles.
My car has an automatic transmission.

A: Hello. This can happen after the vehicle lo...

Hello. This can happen after the vehicle loses power from a dead battery. Most of the time it is caused by an issue with the programming in the module. It is possible that this was the reason why the battery or alternator failed.

A bad ignition switch can cause this and overload the battery and alternator causing them to fail.

One other possibility is a failure in the module if the battery cables were crossed at any time accordingly during the repair. I typically start by checking all of the fuses to see if they are intact. If they are, then these circuits need to be tested with a voltage meter to see where they are losing power and why the radio power is not being turned off.

If you need help having these checks done, consider having the work done by a certified mechanic who can come to your home or office to repair your electrical issue.

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・Save up to 30%

Get a quote

What others are asking

Q: Overheating issue and coolant draining after replacing head gasket

Hello. Was there any issue with the coolant before this point? If so, the blown head gasket may be a result of the engine overheating due to lack of coolant. You should start by pressure testing the cooling system. Make...

Q: Coolant is leaking also smoke is coming from engine.

If the white smoke is coming from the engine / engine bay, then it's possible that the leaking coolant is coming into contact with hot engine and/or exhaust components and causing the smoke. If the white smoke is coming from...

Q: Car chokes when accelerating and when at a stop

Hi there. Based on the events you have described, finding another mechanic would be recommended. Your vehicle choking could be the result of a bad fuel pressure regulator, but I would not recommend replacing anything else until the vehicle is...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...