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Home >> Mercury >> 1995 >> Villager LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 93 (Cruise Control System) >> Testing >> Pinpoint Test C - Set Speed Fluctuates
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Pinpoint Test C - Set Speed Fluctuates

WARNING: This page is about a different car, the 1996 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Disable air bag system before working around steering column or removing any air bag system component. See appropriate AIR BAG RESTRAINT SYSTEM article.
  1. While observing speedometer, test drive vehicle at a constant speed between 40-55 MPH. If speedometer does not display a constant speed, diagnose and repair speedometer as necessary. If speedometer displays a constant speed, go to next step.
  2. Test speed control servo. See SPEED CONTROL SERVO  under TESTING. If speed control servo is okay, go to next step. If speed control servo is not okay, replace speed control servo.
  3. Turn ignition off. Disconnect instrument cluster connector and speed control amplifier connector. Measure resistance of Green/Yellow wire between instrument cluster connector and speed control amplifier connector. Measure resistance of Green/Yellow wire between instrument cluster connector and ground. Resistances should be less than 5 ohms between instrument cluster and amplifier, and greater than 10 k/ohms between instrument cluster and ground. If resistances are as specified, replace speed control amplifier. If resistances are not as specified, repair Green/Yellow wire.
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