Booger Posted March 25, 2012 Report Share Posted March 25, 2012 Hey guys, I have a 72 510 with a KA24DE (95 Nissan 240sx engine/transmission) and I'm trying to get my auto meter ultra lite speedo (http://www.summitracing.com/parts/ATM-4488/) to work. I've pretty much tried everything, done my research and I've gotten no where. Here's what I have; I have power going to the speedo, correct ground, correct lighting etc....I have tried to connect the signal wire from the gauge to the pin on the ecu, but ive got nothing. I tried to connect the wire from the gauge straight to the wires coming out of the speedo attached to the transmission, but nothing happens. I've done the "calibration test" after trying each of these different ways. Anyone have any info? I've looked online, i have the directions that came with the gauge.....Having said all of that, I'm not the best with wires but I usually get this stuff to work. I have successfully wired up my auto meter tach/water temp/oil/fuel, so I know its not beyond me lol. thanks in advance Quote Link to comment
Uber Deaf One Posted March 25, 2012 Report Share Posted March 25, 2012 What speed sensor do you have? Quote Link to comment
Booger Posted March 25, 2012 Author Report Share Posted March 25, 2012 I currently have the stock ka24de speed sensor from a s14. Quote Link to comment
Uber Deaf One Posted March 26, 2012 Report Share Posted March 26, 2012 Is the ECU an S14 ECU as well? Electronic speed sensor right? Quote Link to comment
Booger Posted March 26, 2012 Author Report Share Posted March 26, 2012 Yes sir. Everything is s14. Forgot to mention that lol Quote Link to comment
Booger Posted March 26, 2012 Author Report Share Posted March 26, 2012 The speed sensor is electric. Is has two wires coming out of it. Quote Link to comment
Uber Deaf One Posted March 26, 2012 Report Share Posted March 26, 2012 Bad speedo? All I can think of... I'm running a mechanical speed sensor to the stock speedometer lol. Speed sensor is for a 200SX.. if you feel like going mechanical. Quote Link to comment
Booger Posted March 26, 2012 Author Report Share Posted March 26, 2012 I used to have this engine/transmission set up in my 240sx, so i know everything works. I have a feeling I either have it hooked up wrong, or I need some kind of speedo adaptor or something. Quote Link to comment
Booger Posted March 26, 2012 Author Report Share Posted March 26, 2012 I finally figured it out. For those of you interested, heres how I did it; Hook up the ground, power, and lighting wires correctly (on the speedo). Then, locate the signal port (mine was at the upper left....looking at the back of the speedo). After you have done all that, don't waste your time locating anything on the ECU. Instead, go under the car and locate the two wires coming out of the speed sensor, and splice into the "HIGH" wire. I used a T crimp to do this and connected one end of the "High/signal" wire spice and ran a wire to the speedo signal port. As for the second wire coming out of your speed sensor, cut that wire and run it to ground. At first, I didn't run the second speed sensor wire to ground and my speedometer only worked +40mph. After I ran that wire to ground, my speedometer worked flawlessly. Once everything is hooked up, do the correct calibration and your done!!! :thumbup: Quote Link to comment
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