Power locks, dome light and rear window only work when the Sequoia is started. on 2003 Toyota Sequoia

Recently my power locks and alarm stopped working when using the key fab. I thought it was the batteries in the key fab so I tried my backup fab. It also didn't work. Then I noticed the power locks didn't work at all unless the ignition was turned over. The same for the dome lights, when I opened the doors with the car off the dome lights would not work. But they work fine when the car is started. I double checked to make sure the lights were set to the "door position". The rear window also does not work when I insert the key and turn it - unless the car is started. Is there a fuse that controls this that needs to be replaced, or is this a bigger issue? Any advice would be appreciated.

by in Excelsior, MN on August 29, 2012
1 answer 1 comment
ANSWER by on August 29, 2012
have u codes scanned and post so we can advise
COMMENT by on September 08, 2012
I found that the fuse that was Blown was the ECU-B fuse which controls a bunch of auxiliary items when the ignition is off - dome lights, alarm system, power locks, rear window etc. It may also be related to the radio. I replaced it and it blew after three times of locking my doors. I replaced it again and it lasted about 2 days. I Called Toyota to see if it would be worth trying to pull a code and they said no (not very confidently). I wanted to check back with the new info to see if you would still recommend scanning codes.. On a side note, I have noticed that while driving, the sound to the front speakers will go muffled or decreased in volume and then come back to normal. I suspect one of the amps which powers the front speakers is having issues. Not sure if this is related to the ECU-B fuse? I'm wondering if I have a short somewhere causing all these issues? I have read about the rear window wiring getting worn on this model. Thanks for the response.

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