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It sounds like the accessory delay relay has failed. I would try that first, you can swap it with the rear defrost relay for testing. They are both on the backside of the interior fusebox. Click link below for location.
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Also check fuse 17 in the interior fuse box
They are on the backside of the fusebox. Needs to be disengaged and turned to access relays.
Does fuse 62 in the underhood fusebox have power on both sides and did you check fuse 17 for power on both sides in the interior fuse box?
If ok then you need to test for power in the delay relay socket pins 30 and 85. look on relay for pin numbers then transfer to cavity terminals for testing.