maroonls1z

How did you go about figuring this out. I have the same problem but different situation. Running a different os than what the harness is made for. I need to track down where the asr problem lies but i guess i need service manuals for both my car and the one that the os is made for so i can figure the differences?

red_00z28

iTrader: (14)

First I noticed that on the 98 side of this C200 connector there was a purple/white wire and on the 99+ side there was nothing. After digging deep enough on the interweb I found the pinout for the 99+ and started noticing the differences. For instance the yellow/black wire that I'm assuming is why I had my no start issue. On the 99+ harness there is nothing. So that is why I'm looking for a 98 pinout of this connector so I can go through it and swap the wire that don't match up. Again just to be clear. I'm using a 99+ interior dash harness as well as a 99+ engine harness. The EBCM on the 99+ sends its info. Through class 2 serial data. Maybe that's why you are having issue with it.

maroonls1z

Im using the same harness and everything that came with the car. Just running a different OS and it is expecting bcm signals from a 2002 tahoe bcm

red_00z28

iTrader: (14)

The you should be able to get the pin out from the 02 Tahoe bcm and see what signals go to the PCM compare it to the f-body bcm, and just swap the wires from the f-body bcm to the PCM. Or am I missing something? What PCM are you using?

maroonls1z

Well the bcm is entirely different from vehicle to vehicle so im hoping it is as easy as that. I havnt been able to find a pin out for either vehicle at this point so i will probably have to buy the service manuals

red_00z28

iTrader: (14)

I found the pinout for the 99+ f-body doing a Google search.

maroonls1z

Full pin out out of a bcm? I havnt been able to find out

red_00z28

iTrader: (14)

This should be what you need for the 99+ f-body.

maroonls1z

Yah i have seen that one, but that is one of 3 connectors on the bcm. Non of those have anything to do with ASR

red_00z28

iTrader: (14)

ASR should all come from the EBCM I thought?

maroonls1z

Hah it does, but that one you posted is 1 of 3 connectors to the bcm. I cant find a pin out of the other 2

red_00z28

iTrader: (14)

This is from the 1998 service manual. No ASR stuff on the other two connectors either it looks like.

red_00z28

iTrader: (14)

Bump. Anybody have any luck with there issues?

red_00z28

iTrader: (14)

Thought i would update this thread with my fix for the abs/tcs issues after the swap. I replace the 98 EBCM with a 99+ unit and moved the LT. GREEN wire in pin 7 on the EBCM connector to pin 25. This is the serial data wire for the 99+ harness and gauges. after i did this the light are off on the dash and my ASR switch works. Just to recap i used the 99+ engine, dash, gauges, and EBCM. Hope this helps in some way.