Cruise control issues...

[Squid4life]

Okay, so I am converted from hot air to IC'ed so this may beg for help from both crowds. I am getting ready for this cross-country trip and would really love to get my cruise working. The light does not come on at the dash, not sure where it is honestly I need to pull the cluster. I have the vac diaphragm and cable, vac line hooked up etc. But I am reading about a vacuum ball behind the pass side headlight. It this a 87 thing? I do not have one. Is it elsewhere on the 85?

I really need to get this up and going, but need to make sure I have all the components first. I have two manuals, neither show anything relevant. Any links, pics, lists, suggestions?

 

[87GN_70GS]

Before you do anything major, carefully pull out the turn signal stalk and inspect the cruise switch wires for breakage.

 

[salvageV6]

After you turn the cruise to ON at the stalk measure power at the black box cruise module wiring.

You need to see +12 on the gray wire or PIN A of the box, and power on the brown wire PIN G of the box.

G is thru the brake switch so if that isn't making contact pushed into the brake pedal to make contact far enough the cruise won't work.

Don't step on the brake while doing the test either.

Next test leaving the Cruise switch ON at the stalk would be the set switch test, push that one and look for +12 while holding the switch on the dark blue wire PIN L on the cruise box.

Last test is the resume/accel. switch when pushed should give you +12 on the gray/black stripe wire PIN M on the cruise module.

Cruise control switch still in the ON position for all tests. Foot off the brakes.

The 5 Amp Cruise fuse must be good for all tests and power available on the pink/black wire where the stalk wiring meets the wires going to the cruise box module under the dash near the steering column, it has it's own funky looking 4 cavity flat connector. Wiring from the cruise stalk looks like telephone wires in a black jacket.

It's easier to test at the black box module sometimes however which is why I started there with the signals you need to see.

Module doesn't need the connector to be plugged into it for this testing so just take a reading for those +12 signals from the large plug going into it.

IGN Key on for the tests as well and check that cruise fuse.

 

[Squid4life]

Good info, thanks!!!!