GPS Install Speed Pulse Location
 

Does anyone know where I can pick up the speed detection circuit speed pulse signal? I'm guessing it is probably available at the BCM, but I have no idea which wire it is.

Thanks very much!

The GPS shows the MPH, unless you are tring to show the difference. Mine is really accurate.

Thanks. I'm pulling out the premium sound system and installing a Pioneer AVIC-Z1. It uses the signal to maintain accuracy when the GPS signal is not present, so I need to get to the signal to connect to the receiver....

I looked this up for HVROD but never heard if it worked or not. Here is what I sent him....

If you have an automatic, then the ECM C3 (Gray) connector:

Pin 66
YELLOW
Vehicle Speed Sensor Signal High (w/M86)

Pin 67
PURPLE
Vehicle Speed Sensor Low (w/M86)

Where are those located??