Automatic m50b25, what are these wires for?

[Slider]

This motor was pulled out of an early automatic e36 with a green 103 DME. Trying to figure out which wires can be eliminated, does anyone know what these wires are for, the ones in the 3 black housings?



Thanks!

[Need4Speed1299]

I have the exact same issue. I have a 413 dme, and a vanos obd1 auto harness, but manual trans. Im pretty sure we need to keep a few wires from that bundle for the o2 sensor. The rest I believe are for the auto trans.

[Slider]

Yeah started going through it today, it looks like 2 of those bundles go to the automatic computer, and yeah I was kind of guessing one of those is the o2 sensor wires. Just gotta figure out the colors, I've been using these manuals: http://wedophones.com/BMWManualsLead.htm

From what I see all the connections are the x20 connector, and the only one that needs to be hooked up from the automatic computer is the brown/black which energizes the starter relay.

[Need4Speed1299]

Thanks for the link. I wonder if thats a neutral safety switch, or a foot on the brake type of switch.

[Slider]

Neutral safety it disables the starter if you're not in park or drive, you could also bypass the starter relay, either way will work.

[mpowerful]

You can cut out all of that except the o2 wires. You need to put a plug back onto the o2 wires and use them. Since I happened to pull an auto m50 harness in the boneyard yesterday here is a pic of the wire colors for the o2 sensor plug.

[Slider]

Awesome, thanks!

[M3PO]

Yep, one is O2 (four wires), the biggest one plugs into the trans, not sure on the third.

[M3PO]

PS. I didn't have to do anything about a neutral safety switch.