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No cruising with control

jenkx

Well-known member
Joined
Jul 11, 2015
Messages
49
Location
Michigan
Help.
MY 82 c3 has never had an operating cruise control. The switch seems to work work via tester and the servo holds vacum. I did install a new transducer also. All hoses are going to the right areas.
There is a small solenoid on the top of the transducer that someone mentioned that it is part of the resume system. I know that I'm getting good vacuum to the solenoid but I'm not sure if it passing through the solinoid.
Suggestions please?

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dougelam

Well-known member
Joined
Jul 19, 2011
Messages
453
Location
Michigan
Corvette
2002 Roadster
Boy - I remember unplugging the connector and turning it 90° and plugging what was the vertical female on the horizontal male spade. Key on and pushing the set button, if I heard it clicking the set switch and resume solenoid was OK.
Then I went to the brake switch, found the vacuum dump the problem most of the time

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jenkx

Well-known member
Joined
Jul 11, 2015
Messages
49
Location
Michigan
Hi again.....I had to take a break from working on the vet to work.
Now I Habs time to continue with my cc problem.
I have check all of the electrical connections from the switch to the cc unit a day all is well. I have replaced the brake switch too. I noticed that when I was checking the engage button, my tester showed a pulse for a connection. Not a constant on. Is this right?
Is there a way to check the transducer itself?
Still no cruise.
Thank you

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Joined
Mar 9, 2009
Messages
1,026
Location
Yemen
The cruise control also uses a switch on the brake pedal that will disengage the cruise control when the brake pedal is depressed. It's possible your switch has been disconnected or removed by a previous owner.
 

jenkx

Well-known member
Joined
Jul 11, 2015
Messages
49
Location
Michigan
Thank you for the reply.
I did replace the switch with the electrical contact for the disengage. I checked it and it is properly working through the wiring diagram. Now I'm checking the cruise brake release valve. I ran a vacuum check and it seems to lack the ability to hold pressure.
I'm looking to replace this next.
I am looking for a resistance measurement for the transducer if anyone could help with that please.
Thank you

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Lakeside49

Well-known member
Joined
Nov 29, 2013
Messages
61
Location
USA
Corvette
1982 Red Coupe
The issue is usually the transducer. Do a search here on this forum as I posted my own corrective solution which may help you get your cruise to work again.


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Joined
Mar 9, 2009
Messages
1,026
Location
Yemen
My diaphragm failed about 20 years ago and I never bothered to replace it. First of all a replacement cost about $100 and secondly I never liked to use a cruise control anyway. I would much rather have full control over my throttle all the time and if my foot gets a little tired on a long trip I just stop for a while and walk around. Take a leak, buy some snacks, stretch my arms and legs, and enjoy the moment. When I travel I have always felt it's better to drive slowly and enjoy the sights.
 

jenkx

Well-known member
Joined
Jul 11, 2015
Messages
49
Location
Michigan
Bingo on the cruise brake release valve. I now have cruise control.
Thank you everyone

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jenkx

Well-known member
Joined
Jul 11, 2015
Messages
49
Location
Michigan
The switch was physically there. The vacuum side of the switch leaked and the electrical contacts created a short.
The unit looked original from 82

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