88durel

iTrader: (4)

Hey Everyone,

Well I am about to turn this baby over and hope that I have done everything correctly. That being said there are a few mysterious wires that I need help with. Car is a 1990 s5 and engine is an s4, tranny is an s5 t2 (I believe)


#4 - I Think this one is the oil sensor plug and self explanatory.

? - Oil pressure sensor doesn't have a wire going to it.
Condenser for the Oil Pressure Sender is no longer on my car, I have a spare one I could put on but I am unsure which one of these wires would go to it.



Can anyone provide me some guidance?

satch

iTrader: (1)

2nd pic, plug w/Y/R wire goes to the Oil Pressure Sender.

satch

iTrader: (1)

First pic. Are the two plugs a plug which houses two wires but has only one wire or a plug which only can house one wire. And exactly what color is the wire as they both appear to be Blue in general?

2nd pic. Does the Black wire have a stripe on it or is it plain Black? And is the plug itself have a notch in it like the other plug in the pic or is it different.

3rd pic. The Red notches are not a stripe. A stripe would be solid throughout the length of the wire. So, is this wire just Black or Black w/a stripe on it? And is this from an S5 harness or not?

4th pic. How many wires and what are the colors? And again, S5 harness or not.

K-Tune

iTrader: (26)

1st pic...polarity does not matter, it's just a switch. you can't mess it up by doing it "backwards"

2nd pic yel/red is oil pressure, thick black resembles starter signal wire

3rd pic is that the bell housing ground? It should still be attached so that the engine is grounded properly.

4th pic yep, plug it in.

88durel

iTrader: (4)

Pic #2 I connected a black with red stripe to starter as it shared the same plastic loom cover as the starter power wire. This one has a shielding over it but shares the loom cover of this main ground.

Pic #3 black with red notches, black with blue stripe. Makes me feel like it should connect to those blue wires off the tranny as there is a set of two. But the way the loom is setup its not close to reaching.

satch

iTrader: (1)

S5 harness?

Pic #2. The B/R wire would have voltage w/key to start and clutch pedal depressed, but no power w/key to start and clutch not depressed. And of course if it had power the starter solenoid would be engaged.

88durel

iTrader: (4)

Yup. S5 N/A. My oil pressure sensor wire doesn't look like it'll reach either. Hmm..

88durel

iTrader: (4)

Good point. Ill check that in the morning getting pretty dark now.

88durel

iTrader: (4)

Checked the B/R wire connected to my starter and it was 12v as when clutch down and key on start position. So its not what this other black wire is.

88durel

iTrader: (4)

Checked the B/R wire connected to my starter and it was 12v as when clutch down and key on start position. So its not what this other black wire is.

satch

iTrader: (1)

K-tune was suggesting that the Black wire w/the ringlet could be a firewall ground. If you look by the wiper motor there should be a ground bolted to the firewall within inches of the wiper motor.

satch

iTrader: (1)

By the transmission would be a 5th Switch which has a single Black wire which plugs into a Black/Blue wire. The Black/Blue wire runs to pin 1T of the ECU. Acontinuity test of the B/L wire at the ECU and one of the B/L wires in pic #1 would tell you what is what.

88durel

iTrader: (4)

Ecu? So with my stand alone microtech it won't work anyways?

Ringlet makes sense. And yes, I plugged in the firewall switch. Which one of these wires is for the condensor? My guess is that will rule out one of them anyways as Its not plugged in (took one off a spare tranny today as it has never been plugged in)

satch

iTrader: (1)

As far as the 5th Switch is concerned I don't know if it's a feature on a Microtech.


There are two condensors, one is for the Oil Sender and the other is for the coils.

88durel

iTrader: (4)

Using Bosch coils. But oil condesor wire color?

Still not sure where these blue wires connect to off the tranny. 5th switch? wires.

satch

iTrader: (1)

The Y/R wire for the Oil Sender splits in two and one runs to the condendor which I think would have a Black wire coming from it. The other condensor for the coils would have a B/Y wire running to it and connecting to the Black wire of the condensor.

The 5th Switch is bolted to the transmission that has a B/L wire coming from it. The wiring diagram does not show it but perhaps the two B/L wires if they plug in together then one side runs to the switch and the other runs to the ECU perhaps.