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Definitely need an expert for this unusual problem
I recently purchased a 2002 love the car but have an annoying problem that I can’t solve. When I make the power seat tilt up in the front with the switch on the side of the seat the telescopic steering wheel moves out. And conversely when I tilt the back of the seat down the telescopic steering wheel goes in. I have replaced the seat module with a correct for my vin working unit, I purchased a brand new seat switch, I’ve verified that the switch on the telescopic wheel has no broken wires. I’ve even replaced the harness underneath the seat. I’ve checked the seven pin blue connector multiple times for continuity. The memory function works fine and the seat moves in all the positions it should...but for some reason I cannot control the steering wheel from the switch on it. I’ve tried to use the reset technique, but no go. The only thing I found that is strange is the pink and orange wire from the blue connector that goes to the switch on the steering wheel are reversed. I did find a diagram online that shows two different types of connectors were used with the wires reversed. I did try switching the wires but no effect. Somehow, making my seat move up or down is sending a signal to the steering wheel to move in or out. Is the most likely suspect at this point a bad BCMThanks for any ideas
Originally Posted by Bill Curlee;[url=tel:1599437912
1599437912[/url]]If it were ME,, I would change the seat multifunction switch on the side of the seat. They do go bad.. Contact VETTENUTS for a good used part..
BC
BC
Thanks Bill, Yes I already change that with a one. I purchased the car at a dealer with this problem so clearly the previous owner and the dealer will enable or not willing to fix it. Got to be a way to get it right lol
I'll mention this as a possibility; check with TechII to make sure all your option codes are properly programmed.
This type of issue could occur if the BCM was replaced and the proper option codes were not reprogrammed via TechII. If you have a service manual, take a look at the BCM replacement procedure.
It looks like the seat control module (SCM) directly controls the drive motor. The steering column switch only provides a ground to the SCM to tell it to move the steering wheel in or out. You should verify with an ohm meter that the black wire at the steering column switch harness is connected to ground, pin C and that the switch is working by verifying continuity between pins a and c and b and c of the switch. The continuity of the wiring between the SCM and the switch should also be verified.
I'll mention this as a possibility; check with TechII to make sure all your option codes are properly programmed.
This type of issue could occur if the BCM was replaced and the proper option codes were not reprogrammed via TechII. If you have a service manual, take a look at the BCM replacement procedure.
That’s what all signs seem to point to I did verify that the switch on the steering wheel is creating ground in fact I hotwired it directly to the ground of the battery and then verified that the wires that I hooked up had continuity. I guess this is what happens when you buy a car at the dealership With no know history...however I got an almost brand new looking 46,000 mile electric blue Corvette that started at an asking price of 15 8 for 10.3. Sure I had to repair one headlight motor and the AC panel and two door locks maybe all in so far 700 additional dollars
This is a major problem at times with the telescopic being controlled by the seat switch. We have always found it to be the wrong SCM however sounds like you have covered all the bases.
That’s what all signs seem to point to I did verify that the switch on the steering wheel is creating ground in fact I hotwired it directly to the ground of the battery and then verified that the wires that I hooked up had continuity. I guess this is what happens when you buy a car at the dealership With no know history...however I got an almost brand new looking 46,000 mile electric blue Corvette that started at an asking price of 15 8 for 10.3. Sure I had to repair one headlight motor and the AC panel and two door locks maybe all in so far 700 additional dollars
When I replaced my BCM with a new one, I did the manual handshake procedure (no TechII) and experienced the exact issue you describe. I even went as far as reinstalling the original defective BCM and the seat and steering column functioned as normal.
If this is your issue, it should be relatively quick and in expensive to resolve. Even if your BCM needs to be replaced it shouldn't break the bank.
Hope you get this sorted out and have many trouble free enjoyable miles.
Can you check to see what SCM is "SUSPOSED" to be installed in his C5? Its a 2002. My guess,,, its most likely correct but, ya never know. He could (Murphys Law) have a bad replacement module.
I too say its a SCM issue BUT,, I would check the wiring just to be sure,,.
Bill
Last edited by Bill Curlee; May 21, 2019 at 07:21 PM.
When I replaced my BCM with a new one, I did the manual handshake procedure (no TechII) and experienced the exact issue you describe. I even went as far as reinstalling the original defective BCM and the seat and steering column functioned as normal.
If this is your issue, it should be relatively quick and in expensive to resolve. Even if your BCM needs to be replaced it shouldn't break the bank.
Hope you get this sorted out and have many trouble free enjoyable miles.
Thank For all the advice Taking it into the dealer on Friday for $160 to look at it and verify that all the option codes are programmed into the BCM
When I replaced my BCM with a new one, I did the manual handshake procedure (no TechII) and experienced the exact issue you describe. I even went as far as reinstalling the original defective BCM and the seat and steering column functioned as normal.
If this is your issue, it should be relatively quick and in expensive to resolve. Even if your BCM needs to be replaced it shouldn't break the bank.
Hope you get this sorted out and have many trouble free enjoyable miles.
This makes more sense to me than any other. BCM's can be tricky so this would be a fast and cheap fix.
Originally Posted by My68
Thank For all the advice Taking it into the dealer on Friday for $160 to look at it and verify that all the option codes are programmed into the BCM
Thats expensive to scan it but it is GM. They will probably tell you it needs a BCM at $800 or something to that nature. I can sell you a BCM with the same Serv number as yours for $180. You will know as soon as you plug it up if it has fixed the issue. All interior functions are there from the first key cycle. You will need to complete 3 10 min key cycles to relearn the key to bcm. Let me know your Serv number and we can ship it right out. If the BCM is not the problem return it with no restocking fee's.
Definitely need an expert for this unusual problem
