the door lights and brake light and battery light turned on?

1998 HONDA ACCORD
290,256 MILES • 3.0L • V6 • 2WD • AUTOMATIC
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CHRISTOPHER IVAN ROEDER
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I was coming home from work when all of a sudden, my dash lit up with all the door lights and brake light and battery light came on. I figured probably just needed to clean up some wires and or the battery terminals and connections. did all that and still the lights are on. I've driven it to and from work like these the past 2 days and my battery is still good with 100% health and 99% state of charge. Any ideas would be very appreciated, thank you in advance.
Jul 30, 2024 at 8:54 AM
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STRAILER
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This is common when the driver side multiplex unit goes out. Here are the instrument cluster wiring diagrams so you can see how the system works with the driver side multiplex unit. I would check the power and grounds to the cluster and if okay I would replace the driver side multiplex unit.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

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Jul 30, 2024 at 9:21 AM
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CHRISTOPHER IVAN ROEDER
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Quick question, could not having the correct size battery cause the warning lights to stay lit? Just curious. Thank you in advance.
Aug 8, 2024 at 8:43 AM
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STRAILER
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Not really, but I would test the alternator to make sure it is working.

Here is a guide:

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Please go over this guide and get back to us.


Aug 8, 2024 at 10:26 AM
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CHRISTOPHER IVAN ROEDER
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Thank you. I will get back to you just as soon as I get it figured out. greatly appreciate your help and time.
Aug 8, 2024 at 11:05 AM
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STRAILER
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You are welcome.
Aug 9, 2024 at 1:26 AM
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CHRISTOPHER IVAN ROEDER
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Since I haven't had a chance to run the tests I had to drive to work and all the dash lights stay on except the abs and it seems to be holding a charge and hasn't died on me yet why is that?
Aug 9, 2024 at 4:11 AM
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STRAILER
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Sometimes the alternator will charge a little bit, if the battery light is on I would do the test.
Aug 10, 2024 at 2:35 AM
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