Rostra Troubleshooting Tips: 250-1774 Cruise Control Switch

  1. Check the black wire with a meter for ground resistance no higher than than 3 ohms with the motor running.
  2. Check both the red and blue wires with a meter for 12-volts ignition power with the motor running.
  3. Make sure that the gray wire is in the proper position according to the installation manual for that vehicle.
  4. Make sure that the switch is transmitting to the module. The voltage will change on the gray wire when you press Set or Resume with the control switch and ignition on. If there is no change, re-program the switch to the module.
  5. Check resistance across the harness disconnect gray from vehicle.

Revised 06/02/2008

The Rostra Technical Services department can be reached Monday-Friday, 8:00 a.m. to 5:00 p.m. EST by calling (800) 732-4744.

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