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E38 OBD2 Help

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E38 OBD2 Help

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Old

Apr 24, 2021 | 09:09 PM

#1

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Teching In

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From: Florida

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E38 OBD2 Help

After reading multiple threads about this I just wanna see if I can clarify this, should the TCM data wires(38,37) be spliced directly into the connector at B&L? I also read in one thread about splicing the TCM into the ECM wires and then running it to the DLC?

I'm currently getting a read error on my scan tool but I ran out of daylight before verifying I didnt mess up the the data wires at the connector, but wanted to see if someone could clarify either way.

Old

Apr 25, 2021 | 06:40 PM

#2

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Teching In

Joined: Jul 2020

Posts: 17

Likes: 3

From: Florida

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I figured it out for anyone who may have a similar problem later.
This is a more accurate diagram of what I had going on and I had the TCM wires going into the splice saver to the A&M slots, because I read it as the TCM going to BCM then into the splice. Instead the ECM/TCM wires splice together then run directly into the DLC. Maybe this was obvious and I just read into it too much, but I also had the full splice saver from my donor. Either way there ya go!

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