I been experiencing some weird behaviors the last couple of days. My speakers would cut in and out for a quick second every now and then while driving. I thought maybe it was loose cable. Then I noticed that my backlights of my odometer, clock, and radio were also dimming when this happens.
Could this be more than an issue with my battery dying?
Any suggestions would be greatly appreciated. Thanks.

2005 TSX/95k

 

How old is your battery?

Dimming lights are most likely your charging system, so probably the battery, but could also be the alternator. I don't remember if our cars have a battery signal, but if you see one then the alternator is probably dead, leading to a dead battery.

Just take it to a Autozone or similar store and they can run a system charging diagnostic for you.

If the battery is nearing or older than 6 years its highly likely it just needs replacement.

 

Agree on the battery advice (to replace it regardless of what else you find) and also on the alternator. All the battery does is start the car; you can literally disconnect it once the car is started as the alternator takes over (at least you could in the old days). What you describe sounds like the symptoms of a failing alternator. Long shot would be a lousy ground cable connection on the battery. It's been reported here before.

 

I took my car to an O'Reillys and had the battery and alternator checked. Both came back as passed. Any other suggestions?

 

Pull open your dash and start looking around *shrug*
I don't think fuses partially fail so I'd think it would be a connection issue.

 

I replaced the battery and alternator. The problem still exists. I found a video on youtube that shows exactly what the problem is:
My next attempt will be to replace the PCB board.

 

Thanks for coming back and posting your findings!

Before ordering a new PCB if it is easy to check your current one I'd try to find the main power and ground wires and see if the solder has simply come undone.
It may be a simple fix of a loose wire.

I'd recommend getting this done sooner than later as if it is a loose wire arching electricity can cause fires, smoke, damage to other parts. Arching happens when the connection is close enough for the electricity to jump between the connectors without them actually in contact.

 

Replaced the negative battery wire and so far so good. Hoping that was the fix.