Gavinvr4

Can someone please tell me which fuse box and what
Exact number operates the Rear view mirror, I already
check on the owners manual But it doesn't specified rear view mirror.

Thanks

FamilyRX

On a 2010 RX350, the inside rear view mirror gets switched power directly form the Overhead Module. There is no fuse directly feeding the mirror. The 10A ECU-IG1 NO.3 fuse feeds the Overhead Module, however, if that fuse was blown you would have a host of other items not working.

For the outside mirrors, the L/H mirror is fed constant power from the 25A FL DOOR fuse and the 10A ECU-B NO.1 fuse. For the R/H mirror, constant power is provided by the 25A FR DOOR fuse. Switched power is provided by the 10A ECU-IG NO.3 fuse for both mirrors.

The outside mirror switch receives constant power from the 7.5A ECU-B NO.2 fuse, which also provides power to several circuits.

Gavinvr4

I appreciate your post familyRX,
I'll have to purchase more fuse first
before I tackle the task.

Thanks

spivey76

New owner of a 2010 RX350 (no nav). I was getting ready to hook up my dashcam by tapping the rearview mirror 12v when I had to stop because of weather, so I had to put everything back together stock. This is when I discovered nothing on the rearview mirror is working (which it did before). No backup camera, compass, or auto dimming light. The only thing I did was remove the wire cover, unplug the harness, and probe to try and find the 12v. None of the fuses are blown, no errors on the dash or ECU, all lights and other mirrors still work and the sunroof still opens and closes.

Has anyone experienced this? Am I looking at replacing the entire mirror? The only thing I can think is I might have shorted something when probing and fried whatever delivers power as I still don't measure any 12v at he mirror harness.

spivey76

Is there another forum that might be able to help? I did try searching this site and google but nothing has turned up.

DaveGS4

iTrader: (2)

Might need to be a little patient for replies since you only posted last evening.

If you have a multimeter you probably could see if power is getting to the the mirror and narrow down where the problem is. I’d still suspect a fuse, possibly not looking at correct one or blown but doesn’t look like it.

You could search for mirror power tap threads which might give you some hints. Examples.

https://www.clublexus.com/forums/rx-...ew-mirror.html

https://www.clublexus.com/forums/rx-...rror-pics.html

https://www.clublexus.com/forums/rx-...010-rx350.html

https://www.clublexus.com/forums/rx-...l-removal.html

https://www.clublexus.com/forums/rx-...nnections.html

spivey76

Thanks for the reply.

I've scoured the 3rd Gen RX forum and have already been through the links you provided but haven't found a resolution yet. I also thought it might be a fuse so I tested all of them and they all test good.

DaveGS4

iTrader: (2)

How did you test them? Which ones specifically did you test?

do you have a multimeter to test if power is getting to the mirror?

also can you post an image of the fuse map from your manual?

spivey76

Sorry for reviving a dead thread but was there ever a resolution to this? I'm having the exact same issue.

spivey76

I tested all the wires with a DMM and a ground probe, and with the ACC on and off. Here's pictures of the harness and fuse maps.

spivey76

The issue is fixed. On the way home today I noticed the comfort seats (heater/ cooler) wasn't coming on so I checked that fuse. It was blown. Replaced and now everything is working again; comfort seat controls and the rearview mirror. So for anyone else experiencing this check fuse #6 under the steering column.