Car Alarms: 07 Highlander VSS Wire, wire magic, yellow wires

Question
I am installing an aftermarket CD/DVD/Nav system in my 07 Highlander.  Wire Magic wiring diagram says VSS wire is yellow on 2nd plug down of ECM (located behind glovebox)
There are 3 yellow wires on this plug and none show AC.
1.  Can I use a tach signal for the VSS wire, or can you tell me a different place for a VSS Source in this vehicle

Answer
I honestly have no more info on it then you do.
The Tach won't do the same GPS polling data the
VSS will provide to report to the upload link the Nav
system uses/requires.

Best bet here I think, is to fuse isolate (3amp)
each yellow you found at the ECM and test
each, by connection to yout sytem,
for the signal needed to run the
device being used.

Let us know what you discover.

ALARMTEK
GPStechnician.com