Theta

I'm looking over all of the wiring schematics at the moment (and have been for a good part of the evening), and can't find an acceptable tachometer sensor wire in the driver knee cluster.

Usually, we'd just pull from the OBD2 pins 4/5 and 16 plus an RPM signal from pin 9.

No such luck here. Anyone else been staring at a schematic that has more info than myself? I just don't see anything yet.

As for practical application, this is for installing a dedicated shift light that is programmed via USB for sending shift points and alerting accordingly.

Thanks in advance.

DSteck

Give me a couple hours to get to a desktop and log in. I'll find it.

Theta

Thanks, man. I've been looking through that section for so long now I'm starting to go cross-eyed.

DSteck

Bad news. The ECM, BCM, and cluster all use serial communication for engine speed. I'll keep digging around, but I see nothing in anything I have pertaining to a RPM output. Surely one exists, but is definitely not used for these. Seeing as how historically, GM releases crate motors using one-off operating systems in the same hardware as production vehicles, an output is probably somewhere. You may have to resort to a driver box though.

Theta

Crap - that was my assumption after being unable to find anything...

tomdcarguy

PM sent

BERETTA

If you don't mind me asking where are you finding diagrams for the Stingray? My All Data only has partial info at this time. Thanks

tomdcarguy

GM service info

Theta

OnDemand and AllData are both pretty sparse (until the 1Q update I would think). The only full source is GM SI as Tom said.

BERETTA

Thank you