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Years ago I had this functioning properly and had it configured to illuminate a a given RPM. It seems to no longer work on the version of HPT I just downloaded (2.24). Furthermore If I go VCM controls and command the shift light on I get nothing. MIL and other functions work in the VCM controls window so I'm assuming one of two things is going on.
1. This function has been removed
2. My C.A.G.S light no longer works.
If #2 I don't see any way to actually test this light as when the ignition is turned on and the dash lights are illuminated the 1 to 4 shift C.A.G.S. light does not illuminate by default.
I don't think that'd make any difference unless you've upgrade to newer HPT and then flashed the tune. Any chance you could hook up your scanner and use VCM controls to command shift light on to see if that light illuminates?
There has to be another way especially w/ HPT to command this light. Nobody I know has a tech2 and I'm not going to pay the dealer to do this. So I guess I need HP tuners people to reply to me so I can see if this even works anymore.
When you open your HPT scanner and go into VMC controls and click Shift light ON. Does the CAGS (1 to 4 shift) light illuminate on the dash? What shift light came on for you? The shift light on the HUD? Sorry for last message my phone corrected what I was typing.