12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

Cruise control

Old May 26, 2009 | 02:38 AM
  #1  
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Default Cruise control

... Hey fellas got another question for ya. I haven't looked into it yet,so I'm just tryin to get some ideas on this. I was driving down the highway the other day and decided to put on the cruise. Got it up to 60 and set it. Soon as I let off the set button the truck spooled up and took off like a drag car it went up to 70 and slowed back down to 55 and sat there untill I hit coast. I'm thinking WTF, that was cool...but not so cool. Everytime I set the cruise it hauls a** 10 mph faster, then sets it at around 55.. Any ideas??
 
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Old May 26, 2009 | 10:09 AM
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cpu i know my cruis hasnt worked since i bought it i get power to the controlls but nothing to the selinoid

---AutoMerged DoublePost---

or servo motor whatever its called
 

Last edited by 94cummins12v; May 26, 2009 at 10:09 AM. Reason: Automerged Doublepost
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Old May 26, 2009 | 11:10 AM
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Hey 94
I have an exhaust break also,factory ,in my 96. I was told that with the exhaust break they dont hook up the cruise at the factory. Mine is the same way, light comes on but no cruise. sound right?
 
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Old May 26, 2009 | 11:28 AM
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there might be a bad connection with the tube that controls the cruise control.. mine used to not work then i looked and found out that the tube wasnt connected it somehow blew off
 
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Old May 26, 2009 | 07:47 PM
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Thanks ill have to check it out. I've never messed with the cruise on these trucks
 
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Old May 27, 2009 | 08:47 PM
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yeah my light comes on but no cruise
 
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Old May 29, 2009 | 05:19 PM
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The cruise module is underneath the driver's side battery tray. A lot of time what happens is the battery leaks all over the stuff under there and corrodes the module and the vacuum lines and stuff. My vacuum line had a nice big hole in it, so I just took it off and plugged it up.
 
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Old May 30, 2009 | 01:42 AM
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Originally Posted by daveO
The cruise module is underneath the driver's side battery tray. A lot of time what happens is the battery leaks all over the stuff under there and corrodes the module and the vacuum lines and stuff. My vacuum line had a nice big hole in it, so I just took it off and plugged it up.
Usually you can just replace the bad part of the vacume line.

It a common thing for the CC to hunt around when you first set it. Mine does it too but Ive never replaced the cruise servo.
 
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Old May 30, 2009 | 09:37 AM
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Originally Posted by Dr. Evil
Usually you can just replace the bad part of the vacume line.
Yeah, I tried that, and it still didn't work. Looked around some more and there was evidence of battery acid all over the servo and all the electrical connectors.
 
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Old May 30, 2009 | 10:02 AM
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Ill check it out. Thanks!
 
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