vetterobert

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

AGENT 86

From my 86 FSM, should be the same.

http://members.shaw.ca/dankai/Cruise%20Control%209C.pdf

http://members.shaw.ca/dankai/Cruise%20Control.pdf

kimmer

Check the switch at the brake pedal, that was my problem.

vetterobert

Wow, what great info!

Thanks a bunch!

vetterobert

3D-Aircrew

There is a cruise control module located above the battery that MUST have a solid vacuum line or else it won't work. Rubber lines located near the battery tend to deteriorate.

glava2876

Same for mine.

engle1147

Here is good write up with pics about a problematic cruise control issue related to a failing brake switch.

http://forums.corvetteforum.com/c4-t...-for-94-a.html

Dr.Huxtable

Definitely take a look at the vacuum lines under the module under the hood. Was looking at mine last night and they would like rub away on my finger. Might want to replace anyway