Speed sensor wire from dash

NoDOHC · 03-23-2011, 10:22 PM

You have found correctly, the VSS comes from the speedometer.

I doubt that the digital dash has no means of generating a VSS. In fact, I would expect it to accept a VSS from an external speed sensor. Either way you have a source of vehicle speed.

You will want some form of VSS coming into your ecu so that you can determine which gear you are in on your data logs (it is nice for acceleration data too). That is why I think that the dash would supply such a signal (or accept it).Feed the same signal to the power steering and AAS. The scaling may be off, but I doubt that you will notice a difference (it is no big deal if the Power Steering module thinks that you are going 25 when you are really going 35).

Another option is to completely remove the power steering. I have no trouble steering my car, even in an autoX with the PS pump removed but the PS rack retained.

TTT's procedure for de-powering the rack is optimal.

03-23-2011, 10:22 PM	#1
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 17	You have found correctly, the VSS comes from the speedometer. I doubt that the digital dash has no means of generating a VSS. In fact, I would expect it to accept a VSS from an external speed sensor. Either way you have a source of vehicle speed. You will want some form of VSS coming into your ecu so that you can determine which gear you are in on your data logs (it is nice for acceleration data too). That is why I think that the dash would supply such a signal (or accept it).Feed the same signal to the power steering and AAS. The scaling may be off, but I doubt that you will notice a difference (it is no big deal if the Power Steering module thinks that you are going 25 when you are really going 35). Another option is to completely remove the power steering. I have no trouble steering my car, even in an autoX with the PS pump removed but the PS rack retained. TTT's procedure for de-powering the rack is optimal. __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)