Exercise Cycle

If engine is started with brake pedal depressed (stop lights on), modulator goes through an exercise cycle which may be heard under some conditions. When ignition switch is turned from "OFF" to "ON" (on the way to "START" position), modulator cycles once. If switch is turned slowly with a pause at "ON" position, this cycle may be heard. These cycles are to insure that system is functioning properly and should not be a cause for concern.