M50 Wiring Double Check

[MaxBell]

Incase that image goes down, for future reference I posted this on my Profile, just click my name and "View Public Profile".

[scottinAZ]

I IM'd Nando, he replied with the following:



"You have to add the wires to the E36 harness, and pin them through the C101. C101 pin 2 is for oil level sensor pin 1 (low); C101 pin 10 is for oil level sensor pin 3 (full). pin 2 of the oil level sensor needs to go to ground (either spliced into a harness ground or on the engine/chassis somewhere)."



Hope this helps anyone else doing an M50 from an E36 swap.

From another post on the same subject.

[Mr.SWISS]

Incase that image goes down, for future reference I posted this on my Profile, just click my name and "View Public Profile".

6 needs a home and so does 9. If you don't hook 15 up your windows and blower won't work. But yea, that should start at least..... ;)

[MaxBell]

Thanks scottinAZ/Nando, that makes sense. There's a 3 prong plug in the oil pan sensor, so that connects like this:

Pin 1 -> C101 Pin 2
Pin 2 -> C101 Pin 10
Pin 3 -> Tie this into a ground.

This is just to display/turn on the low oil light correctly, right?

6 needs a home and so does 9. If you don't hook 15 up your windows and blower won't work. But yea, that should start at least..... ;)

Pin 6: O2 sensor relay. I thought the O2 was contained in the E36 harness? Where would I connect this?

Pin 9: There isn't even a wire on the C101 here. What I do?

Pin 15: Again, there's no wire in the C101 in this pin slot. What should I do?

[scottinAZ]

Thanks scottinAZ/Nando, that makes sense. There's a 3 prong plug in the oil pan sensor, so that connects like this:

Pin 1 -> C101 Pin 2
Pin 2 -> C101 Pin 10
Pin 3 -> Tie this into a ground.

This is just to display/turn on the low oil light correctly, right?

you have it a bit off,

Should be Pin 1----> C101 pin 2
Pin 2----> Ground
Pin 3----> C101 pin 10

this will get the sensor on the check panel working properly.

[Mr.SWISS]

8 and 9 will be run to the c104 harness for fuel rate and road speed.
forget about the unloader relay your early car is irrelevant.
Just noticed you have an old style harness car your pins are these:

E30 87' C101 Connector (Car side)

Wire colour Pin No Designation
Car Engine
BU 1 Alternator D+ terminal to Instrument cluster charge light
BU/YL 2 Oil Level Sensor Static (pin 1) to Active check control pin 16
3 Not used
BR/VI 4 Coolant Temp sender to Instrument cluster C1 pin 26
BK/BR 5 Oil Pressure switch to Instrument cluster C1 pin 18
GN/YL 6 Oxygen Sensor Heater Relay
GN 7 Ign switch to coil Primary
8 Not used
9 Not used
VI/GN 10 Oil Level Sensor Dynamic (pin 2) to Active check control pin 20
WT/BU 11 Diagnostic Connector (Service Reset) pin 7 to Instrument cluster C1 pin 22
12 Not used
VI/RD 13 Fuel Pump Relay to Fuse box (Fuse 11)
14 Not used
15 Not used
16 Not used
17 Not used
BK/YL 18 Starter Motor Signal from Ign switch to Starter Solenoid
19 Not used
20 Not used