Cruise control help?
Cruise control help? I have both the brake switches working and power to both switches.
I have power to the cruise on switch and I have the cruise on signal. I have both the set/coast and resume/accel wired up to momentary switches and still no cruise.
What should I check next?
Thanks
Mark
I have power to the cruise on switch and I have the cruise on signal. I have both the set/coast and resume/accel wired up to momentary switches and still no cruise.
What should I check next?
Thanks
Mark
If I'm not mistaking I think it needs to be enabled in the tune, if the truck your PCM came from didn't have cruise, you'll have to turn it on. At least I think I remember reading that somewhere.
Joined: Sep 2004
Posts: 3,148
Likes: 12
From: Downers Grove, IL
If you are missing the VSS signal it should throw a code.
I`m not sure if there is an option to turn the cruise off/on in the PCM. I don`t see a way to do it in HPTuners. Maybe in EFILive?
I`m not sure if there is an option to turn the cruise off/on in the PCM. I don`t see a way to do it in HPTuners. Maybe in EFILive?
Teching In
Joined: Dec 2004
Posts: 45
Likes: 0
From: N. MS
https://ls1tech.com/forums/conversio...ol-wiring.html
Are you DBW, I had the same problem, I had a brake light switch with
two n/o outputs and had the TAC hooked to one and the lights to the other.
Thanks to busta9876 and G-body mine was a simple fix.
Hope this helps you as much as it did me.
Are you DBW, I had the same problem, I had a brake light switch with
two n/o outputs and had the TAC hooked to one and the lights to the other.
Thanks to busta9876 and G-body mine was a simple fix.
Hope this helps you as much as it did me.
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Are you DBW, I had the same problem, I had a brake light switch with
two n/o outputs and had the TAC hooked to one and the lights to the other.
Thanks to busta9876 and G-body mine was a simple fix.
Hope this helps you as much as it did me.
Are you DBW, I had the same problem, I had a brake light switch with
two n/o outputs and had the TAC hooked to one and the lights to the other.
Thanks to busta9876 and G-body mine was a simple fix.
Hope this helps you as much as it did me.
And yes DBW and I have checked the wiring.
I have power to the on/off switch
I have the grey wire that goes from the other side of the on/off switch to the TAC at pin 14
I have the dark blue wire for set/coast at TAC pin 4
I have the grey/black wire for resume/accel at TAC pin 5
I have the light blue wire for stop lamp at TAC pin 6
I have the TCC switch going to the purple wire to the PCM at pin 33
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Verdad Gallardo Joined: Sep 2004
Posts: 3,148
Likes: 12
From: Downers Grove, IL
What transmission did your motor come with, is that the trans your running now? If your running a old style TH400/350/glide/200r4 etc how did they reflash the transmission programming section of your PCM? did they swap in a manual trans segment?
Joined: Sep 2004
Posts: 3,148
Likes: 12
From: Downers Grove, IL
Scratch that, looks like you are running the factory 4l60e. What did you do for a VSS? Is it calibrated correctly for your gear/ tires? I think that some of the GM cruise controls are not set up to engage till 35mph. If your VSS calibration was off and the PCM thought you were only doing 25mph when your actually at 55 trying to engage the cruise it may not engage.
2nd thought is you are turning the cruise power switch on, and then pushing the set/coast button to engage it right?
3rd. Are you using the GM stalk mounted cruise switch? If so Are you sure that it is in good shape. They have a history of having cracked wires as the wires exit the switch and duck into the column, then sometimes the cruise works and sometimes it doesn`t quite make the connection.
2nd thought is you are turning the cruise power switch on, and then pushing the set/coast button to engage it right?
3rd. Are you using the GM stalk mounted cruise switch? If so Are you sure that it is in good shape. They have a history of having cracked wires as the wires exit the switch and duck into the column, then sometimes the cruise works and sometimes it doesn`t quite make the connection.
Scratch that, looks like you are running the factory 4l60e. What did you do for a VSS? Is it calibrated correctly for your gear/ tires? I think that some of the GM cruise controls are not set up to engage till 35mph. If your VSS calibration was off and the PCM thought you were only doing 25mph when your actually at 55 trying to engage the cruise it may not engage.
I am using an advance adapters reluctor ring and VSS that is supposed to give the correct 40 pulse per drive shaft revolution
2nd thought is you are turning the cruise power switch on, and then pushing the set/coast button to engage it right? Correct
3rd. Are you using the GM stalk mounted cruise switch? If so Are you sure that it is in good shape. They have a history of having cracked wires as the wires exit the switch and duck into the column, then sometimes the cruise works and sometimes it doesn`t quite make the connection.
I am using an advance adapters reluctor ring and VSS that is supposed to give the correct 40 pulse per drive shaft revolution
2nd thought is you are turning the cruise power switch on, and then pushing the set/coast button to engage it right? Correct
3rd. Are you using the GM stalk mounted cruise switch? If so Are you sure that it is in good shape. They have a history of having cracked wires as the wires exit the switch and duck into the column, then sometimes the cruise works and sometimes it doesn`t quite make the connection.
I haven't been able to test the VSS yet but believe their would be a code if it was not working. I was going to buy HP Tuners but they do not have cruise testing capabilities. Is there any inexpensive hand help scanners that have the ability to see the cruise inputs?
Thanks for the suggestions.
Mark
Thanks for the suggestions.
Mark
I'm using an aftermarket VSS (Dakota Digital) that is out of range for the program. It solves the stalling issues, doesn't show a code, but wont let the cruise control to work.
Is your VSS the original that came with the trans and computer?
Is your VSS the original that came with the trans and computer?
The VSS is a stock/typical GM VSS that screws into that 4 bolt to 6 bolt adapter right over the reluctor wheel. After work today I removed the VSS and could feel the reluctor wheel still in the correct location.
Here is a picture of the reluctor wheel and VSS installed looking in from the end of the transmission/adapter.
I am hoping that maybe when I had the TCC switch misadjusted and tried using the cruise maybe it disabled it?
I would like to find a scanner that has cruise diagnostic capabilities without having to go for something expensive like a tech II
Pretty much any scanner should tell you if you're getting a VSS signal, if the MPH moves above 0, then the VSS is working. Do you have access to a scanner of any kind? If you were close I'd let you use mine.
I have a couple of friends that own garages and one has a tech II and the other a snap on scan tool. I just hate to bother them (they have already helped a lot).
I want to buy a scanner but I don't want to buy something for $100-200 and find out it doesn't have the diagnostic capabilities I want/need. I can't afford the $3000+ of a tech II. There has to be a cheaper alternative?
I'll either figure it out somehow or I will enjoy driving my 72 Jimmy with an LS/4L60 even without the cruise. I can always tear into the wiring/dash this winter? I was just hoping somebody would think of something I/We have not?
I want to buy a scanner but I don't want to buy something for $100-200 and find out it doesn't have the diagnostic capabilities I want/need. I can't afford the $3000+ of a tech II. There has to be a cheaper alternative?
I'll either figure it out somehow or I will enjoy driving my 72 Jimmy with an LS/4L60 even without the cruise. I can always tear into the wiring/dash this winter? I was just hoping somebody would think of something I/We have not?