[DeTomaso] More cruise control issues (cruise-control-haters, delete immediately!)

[Christopher Kimball]

No, I put it from the VSS to 12v positive.

Chris

> Date: Wed, 9 Sep 2009 06:48:21 -0700
> From: asajay at asajay.com
> To: detomaso at realbig.com
> Subject: Re: [DeTomaso] More cruise control issues (cruise-control-haters, delete immediately!)
> 
> Chris,
> 
> Did you simply put the resistor in-line or did you actually put it from 
> the one wire to a 12V source?  That's what a pull-up resistor does.  A 
> pull-up goes from the line you need pulled-up to a positive source like 
> 12V in this case.  A pull-down goes between the line needing 
> pulled-down, and ground.  If you just put the resistor in-line, then it 
> won't do any good.
> 
> Asa Jay
> 
> Asa Jay Laughton, MSgt, USAFR, Retired
> 
> & Shelley Marie
> Spokane, WA
> 
> 1971 Mach I Mustang  [ASA JAY]
> 1973 Pantera L 5533  [ASASCAT]
>     
> ******************************     
> http://www.asajay.com
> http://www.teampanteraracing.com
>   
> 
> 
> 
> Christopher Kimball wrote:
> > Dear SOBill, et al,
> >
> > Today I tried using a resistor between the VSS wire and the 12v wire on the sending unit (3.3K since they didn't have a 3K), and it made no difference to the funky operation of my cruise control.  I tried various switch positions on the cc brain, including a vss pulse rate of 4,000 pulses per mile all the way up to 24,000 pulses per mile.  The 8,000 to 12,000 worked the best, but even then, the car lunges forward, then coasts, then lunges forward, etc.  I tried different positions with some of the other switches, too, to see if it made any difference--for example the manual said if the thing surges I should reduce the sensitivity, which I did.  I tried 8 cylinder "high" and 8 cylinder "low" with no change in the cc's behavior. 
> >
> > I went through the entire self-diagnostic test built in to the cc unit, and everything checked out.
> >
> > I tried taking the tach signal from the same wire that actually goes to the tach from the MSD tach adapter box, as well as the tach wire coming out of the MSD 6AL on it's way to the tach adapter--it made no difference.
> >
> > I know the signal generator works since without it there was no response at all, if I remember correctly.  Plus, when I spun the rear wheel during the diagnostic test, the LED flashed as it was supposed to.
> >
> > I'll call Dakota Digital again tomorrow to ask them what they think is the problem.  I hope I get someone who actually knows how to hook this goofy thing up!
> >
> > Any suggestions would be appreciated.  Panteras Northwest has a big weekend drive coming up and I don't want to get to our destination with whiplash!
> >
> > Sincerely,
> >
> > Chris
> >
> >
> >
> > From: SOBill at aol.com
> > Date: Tue, 8 Sep 2009 00:51:16 -0400
> > Subject: Re: [DeTomaso] More cruise control issues
> > To: chrisvkimball at msn.com
> >
> >
> >
> >
> >
> >
> >
> >
> > My VSS sender puts out  square wave.
> >  
> > The ZF speedo cable on my '74 turns 1 rev for each rev of the rear 
> > tire.
> >  
> > With a nominal 27 inch diameter tire, my VSS sender will 
> > produce about 12,000 pulses per mile.
> >  
> > Have fun,
> >  
> > SOBill 
> > Taylor
> > sobill at aol.com 
> >  
> >  
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