Cruise Control - Vac To Elec?

[3X00-Modified]

Wouldn't a functional trans compliment that cruise though?

[woody90gtz]

Truck cruise swap is done. Should be functional, but I won't know for sure until I test it. The truck units have self-drilling screws that make mounting easy. The plug in is the same, but the cable is different - at both ends - so you can't just swap the Beretta cable on. After some digging, I did see from pictures that a 3.4L Camaro cable should work with the truck unit and 3x00 throttle bracket. Once I got it in hand I found out the connector is a little bigger than the Beretta one, but about 2 minutes with the die grinder on the bracket fixed it.

So here we have a mid-90s truck cruise unit (without the H pin), 3.4L Camaro cable and 95 Beretta harness wired in with no wiring to the computer. 100% standalone. Going to do the same with my Camaro as long as it works nicely.

Truck left, Beretta right


Beretta top, Camaro middle, truck bottom


Camaro cable installed

[3X00-Modified]

Did you actually try to connect the cruse to the ECU at all? I still feel that you can swap to the electric style in some way on a pre 94 car... But we would have to scan the H pin signal to see what it is putting out, yes as noted on the camaro boards some have a weird pulse signal but I'm sure there is something similar coming from a pre 94 ECU because those had cruise modules too and had similar restrictions as to how the option would work or when it would work.

[woody90gtz]

Jon, there is nothing to connect it to. That's the whole point of this. I looked at the entire pinout for the ECM and there was nothing. My 91 came factory equipped with the vacuum cruise and there was no connection to the ECM. I believe the failsafe for it was the vacuum signal itself.

[3X00-Modified]

Still doesn't mean that that its not just a simple ground signal, no one even tested that. It may not be as complicated as what the Camaro guys were messing with that's all I'm trying to say. Sorry I just don't feel that all the options were extinguished with our stock setups quite yet, but maybe that's just me.

The part# 25315091 (found on 99-up F-body cars) @ about 20 mph needs to see a bunch of grounding signals spaced on/off at different rates to operate on the first attempt from key on

Is this the PN of our units?

[woody90gtz]

Who has a diagram for a 95 gauge cluster? I think I had one at some point that Jon sent me, but I can't find it. I want to wire in the "Cruise" dash light. My diagram for the 91 does not show a cruise light, but I have a 95 cluster in my car, so it should be as simple as adding a pin if I know what location it is at. It's hard to follow the printed circuit on the cluster.

[woody90gtz]

Nvm...pulled all the cluster bulbs out and there isn't one for cruise anyway...I must be thinking of the truck I guess. Been a while since I drove the 95. haha

Cruise works though, ready for the 24hr trip to Denver.

[3X00-Modified]

Hope the trans is up for the ride... LOL