Also heated seats do not work have not checked elements yet. rear defroster does not work along with the trunk release button. could it be a body control module (sbm) ?
Not normally does a body control module go bad, but it can happen. Even when your owners manual might tell you that a certain fuse goes to a certain switch or etc. it's always best to get a test light and check both sides of every fuse in the fuse blocks. Sometimes they will complete the circuit through another fuse. But test both sides of every fuse with a text light. This is cheap and easy insurance. And it doesn't take long at all. Make sure you do a fuse check with the key in every possible position. Some fuse will only test in key on, key start, acc, and etc. hope this helps. If you don't have a test light. They are very inexpensive at pretty much anywhere that sells fuses.
Thanks Shawn for your reply. The reason i am looking at the body control module is according to the GM shop manual the bcm controls several functions that also do not work... interior trunk release,heated seats,rear defroster. I will troubleshoot the fuses .
You also need to check all the body grounds to make sure one hasn't broken or become loss somehow. You could also go to a salvage yard and see if they have one you could use to try. But If the bcm controls the odometer you may run into a legal issue. But if I were you I would sweet talk someone at the savage yard to let you try a bcm. If it works. Tell him you will promise to purchase it from him or her. Because electrical parts such as control modules are all normally dealer items and are usually very expensive. Hope this helps.
So did you ever fix it my 98 park ave is doing all the same stuff... ac compressor, trunk button, rear defrost, dome lights and battery state ????
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SOURCE: rear window defroster, no driver heated seat
check the ground on the passenger side of the rear window under the trim panel. That is what was wrong with mine.
SOURCE: 2000 Buick LeSabre where power locks, seats, windows quit working
If all power devices stopped at the same time you may have a bad fuse link. Since it is rare for all the fuses blowing at once and you already checked them. Start at your fuse links before assuming something expensive.
SOURCE: 1998 buick park ave. rear window defroster not working
Rear Defogger Inoperative, But Heated Mirrors Operate Correctly
1. Connect scan tool. Turn ignition switch to RUN position. Turn rear defogger on. Using scan tool, display BCM
outputs. If rear defogger is being requested on, go to next step. If rear defogger is not being requested on, go to
step 10).
2. Ensure ignition switch is in RUN position. Remove rear defogger relay from rear junction block, located on center
right rear of passenger compartment, under rear seat. Connect test light between ground and defogger relay
harness connector terminal F3 (Brown wire). If test light illuminates, go to next step. If test light does not
illuminate, go to step 11).
3. Connect test light between ground and defogger relay harness connector terminal A2 (Red wire). If test light
illuminates, go to next step. If test light does not illuminate, go to step 12).
4. Connect test light between defogger relay harness connector terminals A2 (Red wire) and B3 (Purple wire). If test
light illuminates, go to step 13). If light does not illuminate, go to next step.
5. Disconnect rear defogger positive and negative feed bus connectors. Connect a jumper wire between defogger
relay harness connector terminals F3 (Brown wire) and A4 (White wire). Connect test light between ground and
positive feed bus connector terminal "A" (Black wire). If test light illuminates, go to next step. If test light does not
illuminate, go to step 8).
6. Connect test light between positive feed bus connector terminal "A" (Black wire) and negative feed bus connector
terminal "B" (Black wire). If test light illuminates, go to next step. If test light does not illuminate, go to step 9).
7. Repair open in Black wire between rear defogger and ground. Recheck system operation.
8. Repair open in Purple wire between rear junction block and heated backlight antenna module. Recheck system
operation.
9. Check for proper terminal contact at rear defogger connectors. Repair as necessary. Recheck system operation.
10. Check for proper terminal contact at BCM. If terminal contact is okay, replace BCM. Recheck system operation.
11. Repair open in Brown wire between rear junction block and instrument panel junction block. Recheck system
operation.
12. Repair open in Red wire between rear junction block and underhood junction block (located in right front corner of
engine compartment, between battery and strut tower). Recheck system operation.
13. Connect test light between defogger relay harness connector terminals F3 (Brown wire) and A4 (White wire). If
test light illuminates, go to next step. If test light does not illuminate, go to step 16).
14. Reinstall defogger relay. Disconnect BCM 32-pin Pink connector C2. BCM is located behind right side of instrument
panel, near rear of glove box. Using DVOM, check voltage between ground and BCM harness connector C2
terminal A3 (White wire). If any voltage is present, go to next step. If no voltage is present, go to step 17).
15. Repair open or short to ground in White wire between rear junction block and BCM. Recheck system operation.
16. Check for poor connection at defogger relay terminals. If connections are okay, replace defogger relay. Recheck
system operation.
17. Check for proper terminal contact at BCM. If terminal contact is okay, replace BCM. Recheck system operation.
SOURCE: 2000 buick lesabre all windows
if the drivers door window works you probably have a open in the serial data line.i have found the data line corroded under the drivers seat causing this problem on other vehicles.you need to check for continuity on the data line between the driver door module and either one of the other door modules.the data line is tan with a white stripe.if it does not have continuity it is probably corroded under the drivers seat beneath the carpet.keep posted.
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