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1987 Corvette cruise control - HELP! 1987 Corvette cruise control - HELP!
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Old 11-15-2010, 08:40 pm   #1
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CM 1987 Corvette cruise control - HELP!
Hi guys,

1987 Corvette, 4 + 3 standard trans, cruise control inop. I have a factory manual with supplements on my Christmas list, but for now all I have are the Haynes and Clymer manuals. They are all but useless for electrical problems. I worked all afternoon trying to trouble shoot my inop cruise control to no avail. I have a long trip coming up and sure would like to make it work.

Does anyone have an applicable wiring diagram for this car/cruise control???

Thanks!
vettebob
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Old 11-15-2010, 10:51 pm   #2
 
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I though mine was screwed up, only to find the cutoff is super sensitive, so if I even brushed the clutch or brake, it kicked off.

Have you checked your vacuum lines and control cables, including at the TB?
1985 Z51 4+3 trans rebuilt 5.7 TPI,(.10 over) w/ CompCams 12-262-4, 52MM Throttlebody, underdrive pulleys, reworked heads, Hypertech Thermomaster chip, & cat back exhaust
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Old 11-16-2010, 02:18 pm   #3
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Vacuum lines check out, but I have NO power at the cruise control servo, not even when the various cruise switches are selected. Fuse is good. I think I need a wiring diagram to trace it all out.

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vettebob
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Old 11-16-2010, 03:28 pm   #4
 
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Hmmm. Fuse and relay check out too? That's strange. Does sound like a wiring issue.

I can send the '85 layout, if that will help.

If so, PM me an email address.
1985 Z51 4+3 trans rebuilt 5.7 TPI,(.10 over) w/ CompCams 12-262-4, 52MM Throttlebody, underdrive pulleys, reworked heads, Hypertech Thermomaster chip, & cat back exhaust
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Old 11-16-2010, 04:24 pm   #5
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Quote:
Originally Posted by vettebob View Post
Vacuum lines check out, but I have NO power at the cruise control servo, not even when the various cruise switches are selected. Fuse is good. I think I need a wiring diagram to trace it all out.

Thanks,
vettebob

Make sure you brake and clutch switch are adjusted properly.
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Old 11-17-2010, 11:20 am   #6
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Thanks guys!!
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