Battery drains, when I put a jump box on it, it beeps and says it is reverse polarity or something like that?

1998 HONDA ACCORD
207,000 MILES • 3.0L • V6 • 2WD • AUTOMATIC
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BEETLEPUNK21
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I just bought this vehicle. Brand new battery but there is a drain somewhere.

It will drain the battery completely! The only way to start the vehicle is using jumper cables from another car.

When I put a jump box on it, it beeps and says it’s reverse polarity or something like that.

After jump starting, the headlights and blinkers sometimes flash like maybe the security alarm is going off. But there is no noise, and the car is able to be driven.

Any idea where to start or look for?
May 19, 2024 at 10:22 PM
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STRAILER
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I would remove the A/C compressor clutch relay to see if the drain stops, this is a common problem with these cars and will hold the clutch coil engaged for the compressor.

This guide can help as well:

https://www.2carpros.com/articles/car-battery-dead-overnight

The jump box can just be responding to a really dead battery so I wouldn't worry about that unless you do have the cables mixed up. I would try the jump box on a known good battery to see if it functions correctly. Here is the location of the compressor relay. Check out the images (below). Let us know how it goes.
May 20, 2024 at 7:34 AM
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BEETLEPUNK21
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Okay, i will check that…
But what would be causing the headlights and turn signals to flash?
May 20, 2024 at 10:51 PM
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STRAILER
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Can I ask if the car has an aftermarket alarm on it? If so, this will be the problem and possibly the battery drain, I would remove the aftermarket alarm and return the wiring back to stock.
May 21, 2024 at 1:26 AM
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BEETLEPUNK21
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Okay, i will check. Thanks!
May 21, 2024 at 1:27 AM
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BEETLEPUNK21
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So, it appears that the alarm is somehow activating when starting the car.

The radio will not even turn on. It will say antitheft.


There doesn’t appear to be an aftermarket alarm system. It seems to be factory. I tried a working fob, and it didn’t do anything

What should I try next?
May 21, 2024 at 11:53 AM
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BEETLEPUNK21
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Can I just disable the factory alarm system? Do you know what the procedure is for that?
May 22, 2024 at 1:13 AM
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STRAILER
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Let's try a hard system reboot, this guide can help you:

https://www.2carpros.com/articles/step-by-step-guide-performing-a-hard-system-reboot-for-your-vehicles-electronics-systems

Please go over this guide and get back to us.
May 22, 2024 at 3:56 AM
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BEETLEPUNK21
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I went out to try and start the car and it was completely dead. so, there’s still a drain somewhere.
May 23, 2024 at 6:54 AM
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BEETLEPUNK21
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I tried the hard system reboot #3. After hooking the cables back up the car alarm started. I did press unlock on the fob and it stopped.
May 24, 2024 at 3:47 AM
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BEETLEPUNK21
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But there is still a drain somewhere, where should I look first?
May 24, 2024 at 3:48 AM
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STRAILER
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Did you try the A/C compressor control relay? Also please go over this guide:

https://www.2carpros.com/articles/car-battery-dead-overnight

Please go over this guide and get back to us.
May 24, 2024 at 5:44 AM
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