New to the forum and am looking for the correct wiring diagram for a 1990 S2 non-turbo 944 instrument cluster, I keep coming across various diagrams, but not for the S2 - anyone got a copy?
Thanks, Dan
944 S2 Instrument Cluster Wiring Diagram
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Tom
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I believe this is the one you are after. This is off my iphone, so if you can't zoom in to get what you need, let me know. It's listed as the 1990 S2 diagram, despite the page heading. I didn't see obvious differences from the earlier 85.5+ schematics for purposes of getting the speedo going, but if you are still can't get it, let me know and I can retrace what I did to drive the cluster/speedo on the bench.
Edit to add downloadable PDF....
Would also love to see and hear more about your project here on Carpokes.
Edit to add downloadable PDF....
Would also love to see and hear more about your project here on Carpokes.
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Thanks Tom, that is very similar to the diagram I have, not sure the wire colours are the same though which is the problem i'm having.
So the project is to get the dashboard working for an EV conversion, so it will be taking in all signals over CANbus and making the original instruments work.
Speedo, Tacho and Fuel gauge are up and working but so far a little bit stumped on the oil pressure and coolant temperature.
It doesnt seem like the fuel gauge which is a simple two wire device which varies the Resistance to ground via the sender - anyone have any idea how they are wired differently? They look to be the same moving coil type driver, but they have a additional coil on the outside compared to the little trim-pot on the fuel and 12v gauges. Are the temp and oil pressure simple grounding style senders?
Thanks
Dan
So the project is to get the dashboard working for an EV conversion, so it will be taking in all signals over CANbus and making the original instruments work.
Speedo, Tacho and Fuel gauge are up and working but so far a little bit stumped on the oil pressure and coolant temperature.
It doesnt seem like the fuel gauge which is a simple two wire device which varies the Resistance to ground via the sender - anyone have any idea how they are wired differently? They look to be the same moving coil type driver, but they have a additional coil on the outside compared to the little trim-pot on the fuel and 12v gauges. Are the temp and oil pressure simple grounding style senders?
Thanks
Dan
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Tom
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Porsche changed the color legends a bit (probably to add more colors) so that might be part of the issue.
The oil pressure signal comes in on the blue wire with white stripe (BL/WT on the S2 chart). The sensor indeed just varies resistance to ground, with 29.6, 65.3, 98.9, 133.6 and 184 ohms representing 1, 2, 3, 4, and 5 on the gauge, respectively. The sender also has an on/off warning light signal on its blue wire (which changes to blue/black by the time it reaches the cluster), which you can presumably ignore or re-purpose.
Coolant temp is similar. Signal comes in on Blue/Yellow wire (BL/GE on the S2 chart). ("Yellow" is Gelb in German, presumably explaining why Yellow is GE in the legend.) Resistance is roughly 300 ohms at the bottom of the gauge, and about 20-25 ohm at the top. There is a chart that equates temps to ohms if helpful, but the gauge has no numbers, so not sure how helpful that it to you. There is also an on/off warning signal on the blue/green wire coming from the sensor, which you can presumably ignore or re-purpose.
Be sure to ohm out the cluster wires to the sensors, as both go through connectors that may or may not still be there....
The oil pressure signal comes in on the blue wire with white stripe (BL/WT on the S2 chart). The sensor indeed just varies resistance to ground, with 29.6, 65.3, 98.9, 133.6 and 184 ohms representing 1, 2, 3, 4, and 5 on the gauge, respectively. The sender also has an on/off warning light signal on its blue wire (which changes to blue/black by the time it reaches the cluster), which you can presumably ignore or re-purpose.
Coolant temp is similar. Signal comes in on Blue/Yellow wire (BL/GE on the S2 chart). ("Yellow" is Gelb in German, presumably explaining why Yellow is GE in the legend.) Resistance is roughly 300 ohms at the bottom of the gauge, and about 20-25 ohm at the top. There is a chart that equates temps to ohms if helpful, but the gauge has no numbers, so not sure how helpful that it to you. There is also an on/off warning signal on the blue/green wire coming from the sensor, which you can presumably ignore or re-purpose.
Be sure to ohm out the cluster wires to the sensors, as both go through connectors that may or may not still be there....