I have a 2002 MN6 which had a steering lock recall performed which removed the lock plate and installed a K harness.

Over the summer, I pulled out my steering column to replace the steering sensor. I did not take notes on the connection of the K Harness. When I connected the K Harness back, I connected the two connectors to both the BCM and lock plate side. I read one post which stated on MN6 cars, the cable is not connected to the lock plate side.

After six months of trouble free operation, I am getting the "Pull Key...." message every time the car is started. If I pull the key, I get the "Service Steering Column" message.

Can someone confirm the correct connection of the K Harness to an MN6 Vette?

Also was there a later recall where the K Harness was not installed, and a relay placed over by the BCM only?

Thanks

 

Thank you for your reply. I just read many of your useful posts in the stickey.

I have one more question. When I get the pull key message, my car is fully drivable, so it appears the dealer reprogrammed the 2 mph speed as part of the recall. Are there any risks at all to removing the K harness?

 

I did have a mail order tune recently, so the tuner must have bumped up the speed as a standard operation. So with the K Harness removed, I should be good to go. IF the actuator motor fails, I believe I will start getting the codes again, then it will be time for an LMC5. Thanks for helping me understand this.

 

Back from the dead a little I know but I had the Service column lock issue on the 2000 c5 mn6 I bought a few months back. It hit me at a buddies shop after I let my battery die from having doors open for 4 hours and it took us about 2 hours to figure out how to get it drivable. I have the k-harness (white relay) and my column lock DOES NOT engage ever though I can hear the motor so I assume the recall is done (checking on that with a gm guy).

In order to fix the car to drive it home I ended up doing 2 things at the same time and they fixed it. I pulled the #23 fuse AND disconnected the k-harness and hooked the cl back up like factory. Not sure WHICH did it but Bamn it worked. Got it home put my HP tuners on it and promptly changed the fuel cutoff speed. My display locked after I did this so I unhooked the battery and reset the display which works fine now. BUT since I unhooked the battery I'm getting the CL error message again (although I can drive it thanks to HP tuners).

So my Question is 2 parts

First is the k-harness the same thing as a CLB??? They are both relays but I really don't get the whole hooked up to both the bcm AND the colum lock if the locking plate has essentially been disabled.

Second - do I:

1. REinstall the k-harness?
a. If I reinstall do I hook up BOTH ends of the k-harness like they
were? I've read on Mn6 cars you only should hook up the bcm side
2. Leave it as is and pull the #23 fuse while key is on to try and re-sync the lock motor or whatever.

Will pulling the fuse with key in "on" chance killing the bcm?

I'm not eager to put in a CLB - I would probably build it but I have heard a bunch of people say they will they won't fry this or that. If it's driveable I'd rather just not take the risk there.

Thanks!

 

8vette7 thank you so much! I just got my vin readout from my buddy who works at gm. I had 01044 in July 2001 and 040006 in April 2004. I did not realize there was another relay in the pass footwell. Ill apply power and test it. I didn't have the error ever until I let the battery die and I heard the relays down there going like gangbusters crazy. Ill hook up the k harness and see if that satisfies it. If not ill look into the lmc5

 

My advice is to PM 8VETTE7. He is very knowledgeable, and there is loads of info in the stickey.

On 8VETTE7's advice, I removed the K Harness, and connected the wiring back to stock. My lock motor was not functioning before that. With the K harness removed, the lock motor came to life, and the alarm messages went away.

I tested the K Harness relay, and while the set / reset coils were fine,the contact was not moving (bad relay).

I decided to install a CLB because it works without powering the lock motor, removing lock motor failure from future issues.

Never did find out if the K Harness should be connected to the lock motor connector.

 

Makes sense on the relay and I'm sure then I should have that as my recall was done in march 2004. That then is another relay I need to test and potentially replace?

From what I read the lmc5 is hands down the best solution IMO is there a downside I'm missing?

Thanks!

 

This post cleared up a LOT of column lock fact and fiction info that is out there. Thanks 8VETTE7

Is there an up-dated Column Lock Schematic out there that shows the purple wire mod and how it interfaces??


Bill

 

8vette7 your the batman of column lock bypass. Lol. Really appreciate you helping me. Just went out and tried all of my "should I's" from above. No matter what config I pull fuse 25 or unhook/ re hook the k harness or column motor I get the error message - though I believe you could find a temporary get me home solution if you were to pull fuse 25 with the key on and wait 20 and reinsert. This was the only way I got no error and as soon as I remove the key the error returns for all subsequent cycles. I must have fried one or both relays.

Further I searched for the relay in the pass footwell ref your link and I find a longish purple wire and a relay. Lucky I was able to tune out the fuel cutoff but will be going the lmc5 route just to get rid of the annoying message!

 

Yeah I agree. I think another relay will just poop next time my battery gets low. May as well put the 10-15 towards the lmc5. It appears it does connect to the bcm as u say eliminating the entire column lock system entirely.

 

^thats what I mean. Thanks again!