haga888

Need some help from the Wiring experts:

I'm trying to hook up a Defi ZD to pick up the tach and speedo signals from the ECU. Are these the correct wires for an 07:

For Tach: Connector E, Pin 25, Blu, Engine Speed Pulse



For Speedo: Connector A, Pin 18, Blu/Wht, output shaft (countershaft) speed sensor



Thanks in advance.

Chuck S

RPM and MPH are both on the OBD2 port, of course. Lots of hardware can read it.

If you want a direct wire for the tach signal find the S2000 instructions for the tach signal on the Modifry redline beeper installation instructions. Sure looks like the Blue wire on pin-25 (per your diagram). Nice photos too. Find Manuals and Help, then find the S2000 stuff. Since he has a speedo modifier there's probably nice clues there too.

-- Chuck

haga888

Thanks, just looked at both. I think I got the right ones.

circuitclub

Update? I also have the zd but was never able to get my speedo to work correctly

modifry

Don't use the speed signal from the sensor to the ECU/cluster - it's about 50 times faster than a "normal" speed signal. Use the speed signal that LEAVES the cluster and goes to the EPS and Conv Top Modules. I have some pictures of where to find it on my "freebies" page here. That page shows how to cut the wire to allow you to operate the top while the car is moving, but that same wire is the one you want to tap for the speed signal.

haga888

thanks. That's actually perfect. I'm currently driving at 399kph down my driveway so connecting it to that wire might give me a bit more accurate reading

jp182

bringing this back from the dead

@modifry any idea what gauge the wire is in that module? I want to make sure i get the correct t-taps for a project i'm working on