My digital AR cruise install won't work. (Page 1/2)
hercimer01 OCT 31, 07:24 PM
Hi all.

Im working with a 1988 GT 5 speed manual trans that did have cruise previously.

I have tried pin D with and without a relay.

I have tried pin G with and without a relay.

Pins F, A, B, C, all work fine.

I have tried with pin H inhibit grounded or not.

Uhgg. Please help?

If you open the pictures in a new window they wil full resoulution.

Do I need to put ignitton power on pin 87 of the pin D relay? EDIT: NO EFFECT.



[This message has been edited by hercimer01 (edited 10-31-2020).]

Spadesluck OCT 31, 11:52 PM
This is what I followed to the word and it worked for me Digital Cruise

Did you do all the work inside the car as well?
hercimer01 NOV 01, 01:33 AM
Yes I did the work. I followed Olivers write up too. I used that write up on my 3800SC and it worked good except it drained my battery after a couple days.
I bypassed the old cruise module. I didn't do the Spedo output mod with the jumper, maybe I should.
I did buy his 3D printed adapter.

[This message has been edited by hercimer01 (edited 11-01-2020).]

darbysan NOV 01, 09:34 AM
Any chance you have LED stoplights? They kept mine from working, until I replaced one with a stock light bulb. The LED's retain enough energy that the Cruise thinks the brakes are still on. Later I inserted a relay in the brake line, which it sounds like you might have already done.

------------------
'87 GT , '00 3800 Series II SC, 4t65e, Vue Power Steering. (SOLD)

fieroguru NOV 01, 10:04 AM
The AR modules have been known to be flakey. Some work, some refuse to work with the same install and wiring setup. It took me 3 modules to find one that worked, and I didn't have to change anything with my wiring. The V8 modules are the same, but they seem to work more consistently.

My install was in a non-cruise car, so I made it a complete stand alone setup and used the same pedal switch for the clutch and brake so I could wire them in series.
Spadesluck NOV 01, 03:54 PM

quote
Originally posted by hercimer01:

Yes I did the work. I followed Olivers write up too. I used that write up on my 3800SC and it worked good except it drained my battery after a couple days.
I bypassed the old cruise module. I didn't do the Spedo output mod with the jumper, maybe I should I bought his 3D printed adapter.




Even Oliver mentioned it was best to do the speedo output for the the cruise control. That could be your problem.
hercimer01 NOV 01, 10:04 PM

quote
Originally posted by darbysan:

Any chance you have LED stoplights? They kept mine from working, until I replaced one with a stock light bulb. The LED's retain enough energy that the Cruise thinks the brakes are still on. Later I inserted a relay in the brake line, which it sounds like you might have already done.




No, Just front LED switch backs.
hercimer01 NOV 01, 10:20 PM

quote
Originally posted by fieroguru:

The AR modules have been known to be flakey. Some work, some refuse to work with the same install and wiring setup. It took me 3 modules to find one that worked, and I didn't have to change anything with my wiring. The V8 modules are the same, but they seem to work more consistently.

My install was in a non-cruise car, so I made it a complete stand alone setup and used the same pedal switch for the clutch and brake so I could wire them in series.



What do you mean, buffer circuit? Is this like the same as the C203 or Speedo connector?

[This message has been edited by hercimer01 (edited 11-01-2020).]

hercimer01 NOV 01, 10:24 PM

quote
Originally posted by Spadesluck:


Even Oliver mentioned it was best to do the speedo output for the the cruise control. That could be your problem.



Yeah, I plan to do this but what does Fieroguru mean by buffer circuit?
olejoedad NOV 02, 11:51 AM
The buffer circuit modifies the digital VSS PPM signal from the OBD2 PCM to an analog signal that the Fiero speedometer can accept.