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Old 06-17-2010, 01:44 PM   #1
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Quadrasteer troubles, any experts ?

When i bought my 2004 Quadrasteer suburban, it had a custom dual exhaust system.. 2 months ago, the tie-rap that held the cable harness away from the exhaust snapped, and the cable melted completely.

a non-GM car shop repaired the harness , and steering still did not work
i bought a new quadrasteer computer on ebay , no luck...
I read that the new computer needed to be re-introduced to the car, so I drove to a company with a Tech 2 system.. they tested the system .. and told me the new computer creates all kinds of error codes, and when they re-installed the old one, it only gave them 1 code : DTC C0527

Apparently this can be the result of 4 conditions :
when Hall 1 2 and 3 have 12 volt as their output
when Hall 1 2 and 3 have 0 volt as their output
when the Hall sensor supply circuit is open
when the Hall sensor ground circuit is open

i think this can be because :

1 the halls are bad
2 the cable harness is not repaired properly *
3 the computer does not read the hall outputs correctly

* the DTC documents state ( in bold and red ) that if the wiring harness to the steering gear motor is damaged in anyway , it MUST be replaced.

Since the harness is probably most affordable, i will replace that first ..
but. what partnumber do i look for ?

help !

Axel , in the Netherlands
Attached Files
File Type: doc DTC C0527.doc (61.5 KB, 67 views)
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Old 06-17-2010, 02:16 PM   #2
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Forum member VAJEEP is the only guy I've known to have purchased one of these and to my knowledge he's had no problems with it. You may want to PM him with this. Good luck.
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Old 06-17-2010, 02:23 PM   #3
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Axel,

Hate to say it, but it sounds like you should visit your nearest GM Dealer.

Love your rig, by the way.
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Old 06-17-2010, 02:29 PM   #4
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Quote:
Originally Posted by airstream66 View Post
Axel,

Hate to say it, but it sounds like you should visit your nearest GM Dealer.

Love your rig, by the way.
The problem is that there are probably less then 3 QS vehicles in Holland , the GM dealer i went to for the Tech-2 system had never seen one before.
( i never saw another one here )

axel
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Old 06-17-2010, 02:56 PM   #5
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Over here, most dealers don't know how to work on them either. Try a new harness and then the steering gear motor, and if that doesn't work, prepare to live without it. I am if or when mine dies.

Disclaimer: I am no expert.

Good luck.
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Old 06-17-2010, 03:14 PM   #6
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You may have to sign onto this page to read this but it is a free site. There are several threads on quadrasteer bowards the bottom of this page. A different serach may bring up more.

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Old 06-17-2010, 03:56 PM   #7
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Quote:
Originally Posted by airstream66 View Post
Over here, most dealers don't know how to work on them either. Try a new harness and then the steering gear motor, and if that doesn't work, prepare to live without it. I am if or when mine dies.

Disclaimer: I am no expert.

Good luck.
thank you !

Since parts for the suburban cost 1/3rd in the USA , i am looking for the part numbers so i can order them online ..( and bypass the european dealer )

i found this page :
2003 Chevrolet Suburban 2500 4WD Steering Control System, /Rear - TC0669601L76M70K25906

but they don;t have a part numbers on the cable harness..

You are correct, its still a wonderful car /drive , even without QS

Axel
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Old 06-17-2010, 04:00 PM   #8
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forum member MOOSETAGS has 2 quadsteer suburbans.

You might PM him.
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Old 06-17-2010, 07:48 PM   #9
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there is a member with gm dealer experience. stay tuned in. i have a feeling he will post something here.
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Old 06-18-2010, 06:37 AM   #10
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Greetings from the Florida Panhandle

Quote:
Originally Posted by airstream66 View Post
forum member MOOSETAGS has 2 quadsteer suburbans.

You might PM him.
I do have two Suburban 2500 Quadrasteer tow vehicles, an '05 4WD with 85,000 miles on it, and an '04 2WD with 65,000 miles on it..

I can't comment on the issues in this thread as I have not experienced any Quadrasteer problems with either of my Suburbans. It does sound like a new wiring harness would be the next thing to try.

Best of luck in getting your problem solved. Please keep us posted.

Brian
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Old 06-20-2010, 02:00 PM   #11
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Quote:
Originally Posted by moosetags View Post
Best of luck in getting your problem solved. Please keep us posted.

Brian
Thanks, Brian,

I posted the same question on the quadrasteer forum, hoping that anyone still reads that.
http://quadrasteerclub.infopop.cc/eve

Axel
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Old 06-20-2010, 06:36 PM   #12
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I just happened to read this thread and would like to offer the following comments.

I know absolutely nothing about Quadsteer GMs but I do know a little about cables in general and troubleshooting problems.

Cables are not very complex although they can be intimidating to the uninitiated. I would suggest finding a wiring or harness diagram for the vehicle and use an ohmmeter or test lamp to check out the cable. The skills needed to do this are not difficult to learn. The most difficult part may be reading the harness diagram as they can be somewhat obscure at times.

Another approach is to look at the repaired area in detail. All automotive harnesses are color coded so if you see for instance an pink wire connected to a green wire that would indicate a problem.

Another approach is to make sure the green wire at one end goes to the green wire at the other end and nowhere else. This is not fool proof as this is not always the case but if something did not match up that seemed to be connected to the hall sensors involved it would make me really curious.

You should be able to find some electronic technician locally who will do this for you or at least guide you thorough the process.

It is difficult to imagine a harness being so messed up you could not repair it as long as the connectors are in good shape.

I realize this may not be the most cost effective way but then again that far from decent service help who knows.

Good luck in your chase.
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Old 06-21-2010, 02:17 AM   #13
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Hi, a wire harness that has been burned and shorted, sometimes will have bad spots in areas that you can't see. You should remove the entire harness and strip it down so you can see every inch of the wires in it. Bad, or not really good, repairs on modern wire harnesses can change the resistance giving the computer false readings. A new wire harness might be best.
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Old 06-21-2010, 03:23 AM   #14
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good luck on finding your solution.

in america there was a commercial with a silverado backing a cattle or horse trailer into a corral. what they didn't show was that truck not being able to pull out of the corral. one of my tech school instructors worked for GM at the time and the engineers were catching some hell because there was a difference in turning degrees when in reverse vs. going forward. they could back into a tight spot but couldn't get it back out.
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