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Originally Posted by rob turbo
i still cant get the s12 tacho working in mine. my tuners tried everything.
had to use an after market rev counter.
any ideas...
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Well don't use the S13 wire to try to get it to work, only aftermarket gauges are sensitive enough to pick up the signal.
I got it working on my mates bluebird. You'll need 4 thick diodes from maplins. The smaller ones allow the current to go the other way and the car won't start.
Tap a wire into each coilpack. There are 3 wires, when looking at the back of the plug, its the left one you need. From each wire put in line a diode so the current can only flow away from the coilpack. Then join all 4 wires together into one and take them to the original wire that feeds the rev counter. This could be found behind the dash (don't know the wire buts it probably blue) or if you still have the original section of loom in the car take it to the connecting plug that connects to the S12 coil earth. Its a single wire plug, the wire is blue.