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68c10airstream · 02-11-2017, 10:38 PM

If you are using a mechanical speedo cable you might as well go to the 70's cruise system that uses the speedo cable for speed reference. A long cable goes from the trans up to a servo/vacuum assembly bolted to the driver's inner fender and a short cable then goes from this servo assembly up to the dash speedo. This system uses engine vacuum to be controlled through the servo to a diaphragm that uses a bead chain to pull the throttle (on some applications).

Inside the cab has a electrical cut/brake switch and a vacuum dump valve. It uses a normal turn signal lever switch.

If you stay with the gps speedo you can still run the cable up from the trans to the servo, obviously you wouldn't need the short cable.

02-11-2017, 10:38 PM	#4
68c10airstream Registered User Join Date: Mar 2013 Location: Marquette michigan Posts: 828	Re: Hotwiring 96 cruise control module If you are using a mechanical speedo cable you might as well go to the 70's cruise system that uses the speedo cable for speed reference. A long cable goes from the trans up to a servo/vacuum assembly bolted to the driver's inner fender and a short cable then goes from this servo assembly up to the dash speedo. This system uses engine vacuum to be controlled through the servo to a diaphragm that uses a bead chain to pull the throttle (on some applications). Inside the cab has a electrical cut/brake switch and a vacuum dump valve. It uses a normal turn signal lever switch. If you stay with the gps speedo you can still run the cable up from the trans to the servo, obviously you wouldn't need the short cable.