Question about Dodge Ram 1500
The cruise control id electromechanical so if it doesn't work then the electronic circuit it contains is defective. What could cause it to malfunction:
- the unit simply doesn't get the power - the fuse is out - check it and replace it.
- the activating button doesn't work - you must disassemble the dash, access the wiring and test the button.
- the cruise control module is malfunctioning - it must be tested and replaced if necessary.
- the servomotor that moves the pedal is defective - access the motor and test it.
- the throttle linkage is broken - replace it.
As you can see only the first procedure is accessible for the average guy. If the fuse is good then it's time to take the pickup to someone with car electronics experience, not your average mechanic.
Posted on Aug 02, 2010
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Posted on Jan 02, 2017
There are a few things you can try. First, check your
brake lights, if they do not work the problem may be
in the stoplight sw circuit. Also there are 3 fuses you
can check, 1 is a 25amp in the fuse block under the
hood the next 2 are in the fuse block under the dash.
One is the 15amp stoplight fuse and the other is a
10amp turn sig fuse. These fuses are either directly
or indirectly related to the cruise ctrl. Next check the
cruise switchs accel/coast set/resume if either sw.
was sticking in any posistion for 90 seconds or more,
the cruise ctrl. will shut down. There are trouble codes that will set but they won't trip the check engine light. You'll need an obdII scanner to recover
them from the memory. If you don't have one, go to
autozone/napa or advance auto parts they will scan it
free. The codes of interest are po571 stoplight switch
po567 and po568 the cruise ctrl switch's. And any
other codes related to the torque converter clutch -
the speed sensor - throttle actuator control.
Hope this helps. Good luck.
Posted on Feb 27, 2010
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