OFF Circuit

On Escort and Tracer, measure voltage between circuit No. 356 (Red/Yellow wire) and ground. On all other models, measure voltage between circuit No. 151 (Light Blue/Black wire) and ground. On all models, press and hold cruise control OFF button. If voltage does not drop to zero, perform CONTROL SWITCHES test. If voltage drops to zero, switch is okay. Install a known good amplifier, and retest circuit.