Good morning all,

It is 2022 and my OEM battery in my 2017 was failing and needed replacing. I went on all the auto parts websites, learned about the compatible batteries, picked size group 27F, and picked a more expensive battery that has greatly increased cold cranking amps. Had it shipped and in the end of a snow storm that gave us a foot of heavy wet cement, I set to replacing it. After figuring out how to remove those little plastic push pins that hold down a huge plastic cover over the front of the engine, I didn't have too many issues.

The car started right up with the new battery and everything has been fine.

Except for one thing.

The analog clock on the dash is completely dead. It doesn't move. Changing the time zone in the settings or trying to set it manually in the GUI does nothing. It doesn't even light up at night.

What do you think is the cause? Could it be a fuse? Would seem weird if the clock takes up a whole fuse as everything else I have checked seems to be working fine. Also not sure which fuse or fuse bank it would be in.

Any help is appreciated. Not a huge deal, but I hate when things don't work as they should.

 

Fuse 54 appears to supply the clock, plus 3rd seat switches and interior illumination lights on entry. Are these other things still working? Entry illumination not working might be overlooked if you are in daylight, and third seat power if you don’t use the third row seats.

It’s almost like Lexus wired up everything else by systems, but had a few random things left over, and just tied the leftovers to fuse 54.

 

That could very well be it. I removed my third row so I can not test that, and I don't see any lights when I open the door, though I'm not sure if I may have that disabled somewhere else, but it's worth checking.

The owners manual is awful. Do you have a mapping you could share for where you found 54 specifically? Or at least, do you know which of the three fuse banks it is in?

Thank you.

 

I found the information in the online owner’s manual. You can download it here.

https://www.lexus.com/drivers/resour...X570&year=2017

 

God, I'm feeling stupid. I downloaded the pdf, I own the hard copy, and it shows the location of the 3 fuse boxes, but I don't see a diagram or where you got fuse 54 from. I'm so sorry, do you have a page number?

 

In the fuse box under the hood, labeled interior lighting. If that fuse is good, I’d use my multimeter to check continuity of all the other fuses. There are a lot of them but they have test ports for the multimeter probes so no need to pull any of them so it won’t take long. There are also fuse panels in the interior, one under driver dash and other under passenger dash. Interesting in that the two interior fuse boxes each is powered through a fuse in the main panel in the engine compartment, which I never realized before.

 

I had found that diagram as well and it's not correct. I believe that may he for 2015 and below.

Looking at the layout and the cryptic labels, it's not clear to me, that's why I was hoping there was a more verbose diagram.

 

Sorry to have wasted your time and particularly having wasted mine. Maybe it is time for a trip to a dealership, where they can use a multimeter as I suggested and check each fuse for you.

 

I'm sorry if I offended, that was not my intention. Thank you for the help.