Cruise Control issue - 1979
Thread Starter
3rd Gear
Joined: Jul 2018
Posts: 3
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From: Indiana
Cruise Control issue - 1979
I replaced the transducer - it was bad. However, with the new one in place the cruise control still is not working. What else should I be looking at - fuses? New to the forum here - so thanks in advance for the help.
Pro
Joined: Mar 2007
Posts: 727
Likes: 113
From: Austin TX area
Don't forget to hook up the ground. I replaced mine a few years ago, tested it before mounting in the holder. Work like it should. Put into the holder and would not work? realized I left the ground disconnected.
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,852
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
This is the factory diagnostic manual with some of our notes penciled in at the end. Use this to figure out your issue. While it says 1978 on the manual, the 1978-1979 cars are the same.
Willcox
Willcox
1978-1979 Corvette Cruise Control Diagnostics
Melting Slicks
Joined: May 2015
Posts: 2,365
Likes: 428
From: Cape Girardeau Missouri
The cruise system is easy to diagnose. All you need is a meter/test light and perhaps a hand vacuum pump with gauge. The only complicated part is the fully contained transducer--otherwise the operation of the parts is simple and direct.
Runaway operation until you press the brake pedal is a transducer failure possibility and reason to disconnect the transducer ground to prevent engagement.
Hope that your servo/vacuum motor behind the carb is working as they are not available in the aftermarket, effectively gone in NOS and increasingly difficult to find in salvage.
Runaway operation until you press the brake pedal is a transducer failure possibility and reason to disconnect the transducer ground to prevent engagement.
Hope that your servo/vacuum motor behind the carb is working as they are not available in the aftermarket, effectively gone in NOS and increasingly difficult to find in salvage.
