What wire feeds info to the OEM tach ('03 RX-1mtn)

[BlgsRX-1mtn]

I got a ? for you electrical experts. What wire feeds the Engine RPM info to the OEM tach?

I have a Daytona multi-funtion guage tha displays my SC oil temp, water temp, voltage, time and RPMs. I am trying to get the RPM function tied in to the OEM wiring. I tried to use the wiring diagram on the CD ROM to track down which wire feeds info to the Tach on my '03 RX-1mtn. It appears to me that there are two wires going to the tach. One is a blue/white wire and the other is a yellow/black.

It appears to me that; the blue/white is a common power feed wire since it runs from a fuse to the tach and damn near everthing else in the instrument pod. This leads me to the conclusion that the other wire (yellow/black) is the one sending the rpm signal from the CDI box. I was hoping maybe sombody with more experience reading electrical schematics could verify this for me.

Thanks, Jim

 

[Srxspec]

Not sure if this question got answered, but I believe it's the Yellow/Black wire.

 

[BlgsRX-1mtn]

Allen, thanks for the reply. I asked the same question in the private SC topic on SW. Somebody over there confirmed it for me. I started the sled after cutting the wire to confirm the stock tach wasn't working.

The lead wire for the Daytona guage is spliced into the main harness near the connections up front. I'm goig to need to check the connection for it though. For some reason the RPMs still don't read out on the Daytona guage but, the stock woks fine after the cut and splice.

Jim

 

[Srxspec]

It could be a problem with tapping directly into the feedwire. When hooking a Racepak to a RX-1 for the tach you get a resistor wire and tap it directly into a orange wire coming off the spark plug cap/coil.