I left my courtesy lights on the other day and ran the battery completely flat. After charging, I reconnected the battery, and [while reaassembling part of the dash] smelled burning...electrical burning. No smoke, smell subsides. The result:
- rear wiper no longer works (washer pump works, wiper motor doesn't)
- courtesy light relay no longer turns off the interior lights when I start the car - instead it turns them ON! courtesy lights otherwise perform normally (including delay function)
No blown fuses. I went through the rear wiper tests in the electrical troubleshooting manual, stopping just short of the last one which narrows it down to the motor, a wire running to the motor, or the wiper delay unit under the dash (which is what I suspect based on the burning smell).
There isn't any test for the courtesy light delay in the manual, but I notice on the wiring diagrams that a PB wire runs from between the courtesy delay and the rear wiper delay. I unfortunately can't tell what the wire "does".
Based on the smell and the lack of blown fuses, I'm fairly certain I've fried at least one of the delay relays - I just wish I knew whether the odd behavior of the courtesy light delay is because it's fried, or if it's behaving that way because the rear wiper delay is fried.
