C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Cruise control

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Old Nov 30, 2009 | 06:42 PM
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Default Cruise control

What's the most common reason for the cruise control to go, besides a blown fuse?

Joe B.
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Old Nov 30, 2009 | 06:44 PM
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vacum T at intake manifold
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Old Nov 30, 2009 | 06:50 PM
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Originally Posted by grinditout
vacum T at intake manifold
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Old Nov 30, 2009 | 07:33 PM
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Thanks; I'll check it out.

Joe B.
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Old Nov 30, 2009 | 09:26 PM
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In addition to above. A bad brake (or clutch) switch contact for the cruise circuit can cause the cruise not to engage. Also make sure the pedals are hitting and depressing the switches and that the assembly(s) is not out of adjustment
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Old Dec 1, 2009 | 12:37 PM
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Originally Posted by pcolt94
In addition to above. A bad brake (or clutch) switch contact for the cruise circuit can cause the cruise not to engage. Also make sure the pedals are hitting and depressing the switches and that the assembly(s) is not out of adjustment
Your talking way above my pay-grade. Can you elaborate, or point me to a website, which can walk me through some of the things you mentioned. I checked for that cruise vacuum in the ASR box, and it looked properly attached, no cuts or nicks on the tubing.

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Joe B.
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Old Dec 1, 2009 | 01:46 PM
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Originally Posted by joe3906
Your talking way above my pay-grade. Can you elaborate, or point me to a website, which can walk me through some of the things you mentioned. I checked for that cruise vacuum in the ASR box, and it looked properly attached, no cuts or nicks on the tubing.

Thanks,
Joe B.
What Paul is saying is the brake switch is by far the most common reason for cruise control problems. Since you have an LT4 you also have a switch on the clutch pedal. While you brake lights might work fine the cruise control part of the brake switch is likely defective.
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Old Dec 1, 2009 | 02:44 PM
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Here is a pix of the switch on the brake pedal. Only one of the tandem switch assemblies has an electrical connector to it. The clutch probably has a single unit switch.

It does come apart and the contacts can be removed and cleaned.
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Old Dec 1, 2009 | 06:56 PM
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Thanks for the pix. I'll check it out, and let you know how I make out. I'll eventually wind up taking it to my mechanic, as all I will do is make matters worse.

Thanks,
Joe B.
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Old Dec 2, 2009 | 10:59 PM
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It was the brake switch on my CE. Just got it home from the shop today.
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Old Dec 3, 2009 | 10:48 AM
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Here's a helpful step by step to fix your cc.
http://www.corvettefever.com/howto/82001/index.html
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