Thanks... all good thoughts.
I will load test the battery... Could be due to voltage drops.
Not sure I know what a "clutter" is? ****** You mean instrument "cluster"?
I don't have or know how to use INPA but it might be time to learn.
I think I will pull the tach next... but I don't want to put the BCM back to gather if there something else to test there....
More info here on this thread:
https://www.northamericanmotoring.co...ml#post4618071

 

Yes cluster, sorry typo

if you want inpa, check out my thread named “Inpa”, post 16

 

I was just reading through that whole thread.
adriancl Has some good stuff in there too.

 

I'm posting this for the next guy.
My original problem was a K-bus error code where the sun roof, turn signal clicks, radio all didn't work as well as the seatbelt and airbag error lights came on the instrument cluster.


K-bus error

WHITE & RED wire with YELLOW stripe is the K-BUS wire. Runs to all the modules on the K-bus shown here.

1. Disconnected the battery from the car completely and charged the battery
2. Reset ECU - Didn't seem to change anything.
3. Passenger footwell BCM/ Body Control module ~ No corrosion. Sticker on side shows no sign of moisture. All wire harnesses look spotless inducing the inside of the module.
4. Alternator ~ Checked good. 14.3 V.
5. Check all the fuses.
6. Wiring harness in Drivers footwell ~ have not checked this.
7. Unplug Tachometer - Caused a 67 Can Bus error for KOM2 but still have the K-bus error. Plugged it back in and cleared code.
8. Pulled the center instrument cluster but found no signs of corrosion or tampered wires.

I'm out. Took it to the dealership:
About 3 years ago I read about the IPOD connectors causing electrical weirdness. So I took it out. Evidently I didn't take it all out. The adapter wiring harness was still connected to the radio and caused the K-bus problems. So they removed and rewired the IPOD interface harness back the factory specs and were able to clear all the codes after that.
So if you have an old IPOD adapter.... you might want to investigate there too.
Here's the rest of the harness that the dealership removed.

 

Just seeing your thread for the first time, and was going to ask if you had the iPod adapter. Had similar symptoms on my car and that was the fix.

Fortunately an easy one to remove.