I'm getting tired of trying to find a diagram for my 1995 GT (3s-ge) ECU. I have to find the speed sensor wire where it plugs into the ECU for my navi system. I just can't figure out where it is. I have also tried to read chinse diagrams. I think I have found one the I can use, but I can't understand it, so I thought someone could help me.

Diagram 1

Diagram 2

I don't see anything in those diagrams that looks like the speed sensor circuit. The speed wire going into the combonation meter (guage cluster) should work though. It's probably blue and you should be able to trace the wire from where it plugs into the cluster down to one of four screws that holds the speedometer in place. Let me know if that works. If not, tell me the colors of each wire that can be traced to each of the four screws and what each screw has written next to it.

Ok. I'm a bit confused. The gauge cluster is hold in place by four screws, right? And one of the wires should be connected to one of them? So this wire is earthed? Maybe this is dumb

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The four screws I'm talkin' about are the ones that secure the actual speedometer GUAGE to the guage CLUSTER. Once you get the guage cluster out you'll see the four screws on the back and the traces on the circuit "board" that connect to the plug.

This post has been edited by WannabeGT4: Jan 29, 2006 - 4:33 PM

Ok. Thank you. I'll check this tomorrow

beat me to it!

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Cool, let me know how it works out.

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when are we going to get your boost guage working?

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Well?

Oh, well today I checked. Four screws and no blue wire but each screw had a character. It was, SI, IG+, IG- and E. I think, this might be wrong because of my memory

Those are for your tachometer. The Speedometer screws should have two screws labeled "E" and two screws labeled "4P" or something similar.

Try this:
The 4 screws securing the speedometer connect to traces on the printed circuit. Two of the screws have traces that are shared with other functions on the cluster. They are probably labeled "E" and are for power and ground.
The remaining two screws are more than likely labeled "4P". They should have a seperate trace for each screw. One goes to the ECU and the other goes to the speed sensor on the transmission. One of the two wires that connect to a trace with a screw labeled "4P" should work.

In the US and Canada one of the wires that connect to the unshared trace is either grey or orange. The other is either grey or blue.

If that still doesn't work for you take a picture of the back of your cluster so I can look at it.

This post has been edited by WannabeGT4: Feb 1, 2006 - 2:05 PM

Update

So today I checked my speedo again after looking at some posts here. It's been a long time since
I bothered looking at it because the navi system worked well. Any who, I thought that maybe the
navi system would get more accurate with the speed signal + I was bored. First of all thank you WannabeGT4,
I did what you sad and found a screw marked 4P that had a separate trace and that trace led to
a orange wire. So I hooked it up and wolaa, works

Glad you got it hooked up. I'm happy to help any time.