Re: LS factory cruise control hook up
 

Crash, clean out your PM box.....:D.

Re: LS factory cruise control hook up
 

done

Re: LS factory cruise control hook up
 

What does it take to get cruise working on a GenIV?

Re: LS factory cruise control hook up
 

Scribed to this one too

Re: LS factory cruise control hook up
 

Hooked mine up on my 72 GMC with 01 6.0 dbc but its not working. I have led taillights. What do I need to check ?
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Re: LS factory cruise control hook up
 

You need to put some sort of load on the circuit. On the brake switch there is an orange wire and a white wire. The orange is constant hot, the white gets power when the brakes are applied. Try hooking a light bulb on the white wire with the other side grounded and see if it works. The light will come on when the brakes are applied if you hook it up right. The bulb needs to be something like an 1157 or close, a peanut bulb like in the dash won't cut it.
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Re: LS factory cruise control hook up
 

I have power at pink and purple. Am I supposed to have any power at vss out or K on module?
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Re: LS factory cruise control hook up
 

Hooked a 2k resistor in there and now it works. Thx.
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Re: LS factory cruise control hook up
 

I just swapped in a 6.0 in a 86 k10 with a 700r4 Mabee I missed something but can this work with a 700 r4 with a psi harness? I have the cruse box that would mount on the firewall of a 99-02 truck. My swap is also drive by cable.
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Re: LS factory cruise control hook up
 

Maybe. What are you doing for a speed sensor (VSS)?

Re: LS factory cruise control hook up
 

Well it's an 86 so it has a cable speedo. So I'm assuming unless I get some aftermarket converter to get a vss output it's a no go?
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Re: LS factory cruise control hook up
 

Speartech labeled a yellow wire for my speedo output. I spliced into that on mine.
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Re: LS factory cruise control hook up
 

Yes, I'm afraid so. You need some kind of speed sensor to get a signal for it to work.

Re: LS factory cruise control hook up
 

This would probably work:

http://www.dakotadigital.com/index.c...rod/prd109.htm

Re: LS factory cruise control hook up
 

LS1nova71, I would like to have one of the Cruise Control switches you offered in post #54. I will PM you. Thanks.

Re: LS factory cruise control hook up
 

Back over on page 2 of this thread "farmtruck" asked about dbw, cruise, and the ebrake. I believe I am running into this same issue. I have a 2005 DBW out of a Tahoe and have wired, checked, re-checked, and checked again all of the cruise, brake switch, and TCC switch connections... all are good but still no cruise.

How do I get the cruise to work? I have a total of three harness connections. 1. The main harness to the computer
2. Two harnesses on the TAC black box.

I have spent hours looking for possible solutions with no results. Any help is appreciated. Thanks.

Re: LS factory cruise control hook up
 

Couple of questions. What kind of switch are you using? Di you have three wires coming from the TAC module hooked up? What kind of brake lights do you have? Do the brake lights come on with very little pressure on the pedal?

Re: LS factory cruise control hook up
 

It is Rostra/ Dakota Digital style switch. I have "corrected" the signals using two relays, and confirmed proper signal with a test light. Farmtruck responded to my PM and stated that his problem was "My stalk was not getting good connection ". I am not sure what that means so I have asked him for clarification. Should I test the signal at the TAC to see if a certain voltage is present?

4 wires from the tac for the cruise: gry/blck, blue, gry, light blue. Light blue to brakes "on" switch (again used a relay here for the blue brake and TCC purple).

Brake lights are standard and I have adjusted the brake switch so they come on when the pedal is pressed. Should I check to see if there is a voltage leak out of the switch? It is the original.

Thanks for the questions your name comes up in a ton of forums regarding cruise and LS swaps, nice to know I am in good hands.

Mark

Re: LS factory cruise control hook up
 

PROBLEM SOLVED! After replying in the message above I went out to dinner. This has been driving me nuts and I am sitting there eating when it hits me... I had wired the light blue brake "on" wire into the relay opposite the TCC. Technically correct, it will get 12 volts when the pedal is pressed, it also creates the same problem found when folks install leds with no resistors = no resistance on the line.

Got home, grabbed the flashlight and attached the light blue wire direct to the brake lights "on" side of the brake switch. Woohoo we have cruise. See you are a miracle worker. :)

Re: LS factory cruise control hook up
 

Cool, glad you got it figured out. Saves me a lot of typing on my phone. Lol

Re: LS factory cruise control hook up
 

Can't wait to see if I can do this with my 2008 Pontiac G8GT conversion!

Re: LS factory cruise control hook up
 

Yoooooou caaaaaaan doooooooo itttttttttttt!!!!!!!!!!!

Re: LS factory cruise control hook up
 

This was a great writeup, thank you so much. I have a question about using rocker/toggle/pushbutton switches instead of the GM stalk. My LS is going into a Datsun so I don't have a place to mount a stalk.I drew a photo of the wiring diagram I think is correct. Could someone verify it please? Thanks!

Re: LS factory cruise control hook up
 

Forgot to attach the drawing. Sorry for it being so sloppy, I just did it quickly.

Re: LS factory cruise control hook up
 

That looks correct to me. Nice drawing by the way!

Re: LS factory cruise control hook up
 

Thanks! Couldn't have done it without you. Now to start wiring.

Re: LS factory cruise control hook up
 

I may have missed it, but what size fuse did GM use on the cruise control circuit?

Re: LS factory cruise control hook up
 

I probably should have included this info in the first post. If I can figure out how, I will go back and edit it. But to answer your question, there should be two 10 amp fuses, one on the wire going to D and one on the wire going to G on the cruise module.

Re: LS factory cruise control hook up
 

ls1nova, what fuses should be used on a DBW application and where should they go? Thanks.

Re: LS factory cruise control hook up
 

Thanks, I need to follow that one as mine is a piece together rocker style on- off switch and push button stalk only with DBW 2003 5.3

Re: LS factory cruise control hook up
 

10 amp fuse on the wire powering up the switches. The light blue wire going to pin C1-6 on the TAC module is also fused with a 15 amp fuse, but since you will be tapping power off your brake switch, it would already be fused through the original brake light fuse, so you don't need to add another one.

Re: LS factory cruise control hook up
 

Would this be correct?

Re: LS factory cruise control hook up
 

Thank you!

Re: LS factory cruise control hook up
 

Actually the wire going to "G" wouldn't need a dedicated fuse since it would be fused at the original brake light fuse before the switch.

Re: LS factory cruise control hook up
 

Thanks, I just thought you were being redundant for extra protection.

Re: LS factory cruise control hook up
 

ls1nova71, in your hand drawn diagram in your first post, you indicate that the "J" is not necessary for the cruise to work. Does that mean it is optional or that it should not be connected? Just out of curisosity, what does the "cruise engagment signal" do? I assume that it is the Cruise Module telling the PCM that the cruise is engaged, but what is the PCM doing with that information? Thanks for all of the great information.

Re: LS factory cruise control hook up
 

I've heard that there are different shift tables for when the cruise is engaged, however, I hooked that wire up on both my truck and my car, and couldn't tell any difference what so ever. I suspect it also sends a signal to the instrument cluster, which is a module it's self, and is what will disengage the cruise when the shift lever is moved into neutral while driving with the cruise on. I have the factory 5.3 NSS mounted on the transmission, and all the wires are hooked up, and it does not disengage when shifted into neutral. Not a big deal since it seems totally unnatural to do that anyway, but I've tested it and it's the same on both of my cars, it will rev until it hits the rev limiter if you don't shut it down first. Also, as far as I know, all aftermarket cruise controls will do the same thing.

Re: LS factory cruise control hook up
 

Got it. Thanks for the quick reply!

Re: LS factory cruise control hook up
 

Great thread with lots of great info! I have a new wrinkle though and I will say that after looking at lots of info about adding this cruise control I have worked myself into a state of confusion.

I am adding a 2002 5.3 to my truck. I hadn't originally planned to add cruise but it seems pretty simple, I have it and its now part of the build. I have built the relay circuit shown that Brendan shows on lt1swap.com to send 12v to the PCM (TCC) when I hit the brakes, simple enough.

Now my question is can I use this same circuit for the cruise solution by tying (pin G) into the cold side stop lamp between relay post 85 (circled in red)? Relay post 30 (12v to TCC) could then also be tied into terminal D on the cruise harness for power until the brake pedal is pushed, correct?


It would seem to me I can do this with the original 2-terminal brake switch with little modification and keep things fairly clean and both the TCC and cruise would get what they both need to work correctly.

Am I missing something though? thoughts?

Re: LS factory cruise control hook up
 

^^^ Yes, that should work fine. You worded your second paragraph backwards, it cuts power to the TCC when brakes are applied, but we get the idea. ;)