Wiring diagram body control module 2000 saturn ls1

ANSWER by patrick mannion on June 01, 2010
Looking at a wiring diagram the dome light and rear reading lights operate through the body control module. Check the BCM 2 fuse, BCM 1 fuse and BCM cluster fuse they may all be in the circuit. These fuses are in the engine compartment fuse box.

Dome glove box trunk vanity map lights all out 2003 Saturn L300

The ignition control module ( Body Control Module ) is located above the glove box, you'll need to remove it , and its right there.

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Wiper control .

You need to replace the combination flasher module.

it is not the ECU it is the body control module. it is located under the dash on the driver's side next to the steering coluum. it does need to be reprogrammed,but make sure the numbers match. all cars tday have a ECU.BCM.transmission module and alarm module and abs mudule

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the light is across one diode in the rectifier pack in the alternator, usually there are 9 of them, one of yours has failed, probably the failed diode is leaking current and draining the battery. In this instance the battery will be good (if drained) and the other 8 diodes will show a good charge.Get the current drain checked with everything switched off

I think you can get one from a saturn dealer for under $400. You will have to have them program it and reset the passlock system so the mileage is correct and the car starts though.