94 - cruise control components

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94 - cruise control components

Postby 4lojoe » Fri Apr 21, 2017 12:10 pm

94 S-10 pickup with a carbureted 350.

I did my engine swap back in 2004, and had no need to think about cruise control at the time. Had bigger issues to work through. Well now I'm heading on a trip next week and thought, "Hey, it'd be nice to have cruise control." I built a quick bracket and made some cable end mods to hook up to my carb and ran for a quick test. No go (as I kinda figured).

Anyone here either know or can point me to where I can find the components involved in cruise control functionality?

I know we have the cc module. A break sensor. A minimum speed sensor of some sort. Maybe a vacuum component. Maybe a relay. I don't really know. If the cruise involves the ECM, I can quit now, as I no longer have an ECM. If it doesn't, I can start working to determine what's broken, missing, or disabled.

Thanks for your help.
Joe
4LoJoe
Been sitting in this cab for 23 years and over 300,000 miles...
94 S-10 LS 4x4 Extended Cab
SBC 350, Edelbrock carb & intake, 700R4 tranny, NP231 T-case, custom drive shafts, leaf sprung Dana 44s with 4.10 gears, 15x8 wheels with 32" tires
4lojoe
I found rocker arm monkey's on ebay!
 
Posts: 3
Joined: Mon May 27, 2013 8:51 am

Re: 94 - cruise control components

Postby 4lojoe » Sat Apr 22, 2017 10:14 am

I did find some limited information and tested some things going to the cruise controller. Figured I'd share...
Term A = 12v w/ cruise on (good)
Term B = 12v w/ cruise set held (good)
Term C = 12v w/ cruise resume held (good)
Term D = ~0v w/ brake & 12 v w/o brake (NOT GOOD - I get 0v with or without the brake depressed)
Term E = ground (good)
Term F = 12v w/ key on (good)
Term G = 12v w/ brake and ~0v w/o brake (good)
Term K = fluctuates when moving (didn't test)

So I have at least one known problem relating to Terminal D. It's not the brake switch itself though, because Term G is right.
I'm guessing there's a wiring problem or I have missing component. It seems some models/years used a vacuum servo. Perhaps that was inline between the brake switch and Term D. Anyone have insight or thoughts on this?

The pickup original was the 4.3 vortec (W VIN)
Thanks.
4LoJoe
Been sitting in this cab for 23 years and over 300,000 miles...
94 S-10 LS 4x4 Extended Cab
SBC 350, Edelbrock carb & intake, 700R4 tranny, NP231 T-case, custom drive shafts, leaf sprung Dana 44s with 4.10 gears, 15x8 wheels with 32" tires
4lojoe
I found rocker arm monkey's on ebay!
 
Posts: 3
Joined: Mon May 27, 2013 8:51 am

Re: 94 - cruise control components

Postby 4lojoe » Sat Apr 22, 2017 1:06 pm

Well son-of-a-gun... I have cruise ctrl for the first time since 2004!
Turns out, when you have a wire that's cut, it gets no power to the other end. Go figure.

I really don't remember, but we must have decided I didn't need cruise control anymore, so when we needed a feed off the brake switch (which I think is for the tranny OD switch), we must have just cut that little purple wire and used it. I put a splitter on there to reconnect my wire to itself and bingo. Cruisin'.

Now I just need to weld my new bracket in, do a little touch up painting, and will be done.

I wonder how many posts out here are basically just one person talking to themselves. :) Figured I'd give an update, in case anyone is curious.
4LoJoe
Been sitting in this cab for 23 years and over 300,000 miles...
94 S-10 LS 4x4 Extended Cab
SBC 350, Edelbrock carb & intake, 700R4 tranny, NP231 T-case, custom drive shafts, leaf sprung Dana 44s with 4.10 gears, 15x8 wheels with 32" tires
4lojoe
I found rocker arm monkey's on ebay!
 
Posts: 3
Joined: Mon May 27, 2013 8:51 am

Re: 94 - cruise control components

Postby Rickracer » Sat Apr 22, 2017 5:30 pm

I didn't have time to do any research for you, but glad you got it worked out. :thumbup:
Rickracer
ASE Certified Master Automotive Technician (well over 3 decades of experience, :thumbup: )
'93 S10 SB,RC, Comp XR276 Hydraulic Roller, Vortec head 363, 400 + hp, built 700R4, JW 2800 stall lockup converter, 3.73 posi, disc brake, narrowed 8.8 Exploder rear, LS Camaro front discs, Cal-Trac clone traction bars, Best N/A passes to date: 7.76 in the 1/8th, 12.24@109.27 mph in the 1/4, gonna spray it one of these days... :mrgreen:
76 Chevy Vega Drag Car, TWIN TURBO 355, P/G trans w/ brake and JW 4000 stall vert, 4 link back half, narrowed 9", 3.50 gears, 29.5x10.5W ET Drags. Best time9.669 @ 139.79, Latest video: https://www.youtube.com/watch?v=S59riYn ... ata_player
Rickracer
Master Swap Tech
Master Swap Tech
 
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Location: Kissimmee, Fl.


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