OBD2 S50 up and running!

[S.Low]

No lol the relay

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OH OH!! All that crap still plugged in the the same way from factory. I literally modified nothing on the harness. Last thing i needed at the time was more headaches lol

[jjc034]

OH OH!! All that crap still plugged in the the same way from factory. I literally modified nothing on the harness. Last thing i needed at the time was more headaches lol

Haha thank you.

Did you do this on e30 or e36? If e36 I understand how you left the power in factory location. If e30, where'd you mount that power wire?

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[S.Low]

Haha thank you.

Did you do this on e30 or e36? If e36 I understand how you left the power in factory location. If e30, where'd you mount that power wire?

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E36 :p LOL

[ZekeTheSneak]

No lol the relay

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The orange relay. Trace all the wires. The big red wire with the lug on it goes to the battery. You need the lug connected for the other relays to work. This is bthe main power for the harness. You can cut the orange relay off and remove all the wires associated with the relay. One is red 12v from battery lug. One is common ground. One goes to the sap connector and one wire goes to the dme. I would physically remove all the wire and you will see it's pretty straight forward. I think the burned harness happens when you swap the green and red relays.

[jjc034]

The orange relay. Trace all the wires. The big red wire with the lug on it goes to the battery. You need the lug connected for the other relays to work. This is bthe main power for the harness. You can cut the orange relay off and remove all the wires associated with the relay. One is red 12v from battery lug. One is common ground. One goes to the sap connector and one wire goes to the dme. I would physically remove all the wire and you will see it's pretty straight forward. I think the burned harness happens when you swap the green and red relays.

Thank you @ZekeTheSneak. That red terminal is supposedly used to power the E36 fuse box. The E30 has a separate power wire for the fuse box, so this is where I'm struggling.

E36 wiring harness has 12v power and ground on passenger side, then this additional 12v power lead on drivers side attached to Fuses. I'm just gonna take a closer look tonight

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[ZekeTheSneak]

The red lug is 12v from the battery. Passenger side bulkhead on firewall. Same place the fuse box connects and the starter wire connects. What car is this going into? Solid red wires usually are 12v from the battery. If you trace those wires they supply 12v to the main relay. Red and white wires are key on 12v. They are supplied from the main relay. Brown is always ground. Black is almost always 12v