My passenger side front marker lights dont turn on when I turn the lights on but when I signal then the light blinks as its suppose to. Can anyone advise what seems to be the issue? Prior to this some of the lights on the dashboard (AC, Volume) and seat heat button for LOW are not showing up as well. Is it all related?

Acura TL 2006 , Auto, 204,000 kms

 

It's possible one of the filaments in both bulbs went out simultaneously. These are dual filament bulbs and I've seen this happen before. I'd try replacing them. I think the # is 7443. They come in 2 packs anyway for less than $10, so you have almost nothing to lose. The dashboard lights are likely a different issue.
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I have a bunch of dash lights that I have been replacing. So far all of the interior lights that weren't illuminating were due to burnt out bulbs, not an electrical issue. Just start replacing bulbs and you should be good. I thought I had an electrical issue as the lights would illuminate sometimes or flicker, changed the bulb and it fixed the problem.

 

I have a similar problem currently. Passenger side front marker does not flash when I lock the car but it works fine otherwise. I'm going to check and see if it comes on when I turn the lights on havent checked that yet.

 

I've got the same problem too. Do you find out what makes this problem?

 

Assuming we're talking about the side markers, and not the turn signal/parking light, the PCB is probably fried. It looks like it's common for the seal on the housing to fail, then water gets in and the board corrodes or shorts out.

I'm on my third front passenger side marker now, both previous lights were seriously fried. One looked like it was literally on fire and left the trace peeled away from the board.