[Kickedback]

We still have the car and have an easy way to stop the horn from beeping when you disconnect and reconnect the battery for any reason. It will beep because most likely the security system thinks the car is being stolen. The car is a 2009 Toyota Corolla 1.8 cyl. Nature of the beast. Yesterday husband installed a new alternator and a new battery. Now everything works just fine.

1. Attach the black negative cable.
2. Attach the positive cable. Now the horn starts honking.
3. On the key fob, hit the red panic button twice.
4. Now use the fob to lock the doors. It is ok for the hood to be up.
5. Now use the key fob to unlock the doors.
6. And now the horn stops!

 

[SuperchargedMR2]

When you replace a battery you can use a battery memory device so you don't have to reset everything in your radio. This helps to maintain just enough voltage while you swap out the battery. There are many types, here is just a simple 9v battery one.

Amazon.com: OBD ll Connector Vehicle Memory Saver Reliable and Easy 9 Volt Battery Powered : Automotive

Buy OBD ll Connector Vehicle Memory Saver Reliable and Easy 9 Volt Battery Powered: Code Readers & Scan Tools - Amazon.com ✓ FREE DELIVERY possible on eligible purchases

www.amazon.com

 

[stvotw]

Years back I installed alarms and to krrp them from starting in "tripped' mode all that we did was turn ignition to the on position before powering up the alarm.

 

[Kickedback]

"tripped" mode

Please explain that a bit more.. so, before you connected the battery you simply had the key in the on position without the car actually starting? The alarm in this car was factory installed at time of purchase.

 

[stvotw]

Yes, before connecting battery turn the ignition to the on position is what worked to keep the alarm from sounding when hooking it up to power. Not completely sure on factory system but worth a try. Also, many 'factory' systems are installed at the dealer.

 

[Old Mechanic]

My son in law asked me how to not loose the battery memory when he changed the battery. Told him to use jumper cables to keep the car connected to the replacement battery until he could install it. Worked perfectly and he flipped the car for a nice profit after buying it from a neighbor that did not want to put more money in it.

 

[new echo owner]

I usually just leave the car running with a jumper battery connected to it; it minimize the voltage surge when disconnecting the terminals from the battery!
🤣🤣

 

[brucethompson75]

We still have the car and have an easy way to stop the horn from beeping when you disconnect and reconnect the battery for any reason. It will beep because most likely the security system thinks the car is being stolen. The car is a 2009 Toyota Corolla 1.8 cyl. Nature of the beast. Yesterday husband installed a new alternator and a new battery. Now everything works just fine.

1. Attach the black negative cable.
2. Attach the positive cable. Now the horn starts honking.
3. On the key fob, hit the red panic button twice.
4. Now use the fob to lock the doors. It is ok for the hood to be up.
5. Now use the key fob to unlock the doors.
6. And now the horn stops!

I was changing the battery in a 2016 Camry and the horn started blaring when I made the connection and would not stop. Turns out the auto parts store gave me the wrong battery so I was connecting the negative lead to the positive terminal on the battery and vise a versa. Evidently Toyota battery connections are the opposite of other car manufactures.