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Electrical System

  1. Check fuse and connector. Unplug electric brake switch connector at switch, and connect ohmmeter at 2 terminals on switch. Ohmmeter must indicate no continuity when pedal is depressed and continuity when pedal is released.
  2. Replace switch if necessary. Check clutch release brake switch in same manner. Make sure transducer is well grounded. Disconnect "SET-COAST" switch wire harness connector from main harness connector (Red, Brown/White, and White wires). Connect ohmmeter between Brown/White striped wire in main wiring harness and ground.
  3. Ohmmeter should read 42-49 ohms. If resistance is not within specifications, disconnect the connector from transducer, and measure resistance of Brown/White striped wire. Resistance should be 38-42 ohms. If not within specifications, replace main wiring harness.
  4. Measure solenoid coil circuit resistance between "Hold" terminal and ground. Resistance should be 5-6 ohms. A reading of less than 4 ohms indicates shorting of coil circuit. A reading of more than 7 ohms indicates excessive coil circuit resistance.
  5. Either high or low condition indicates replacement of transducer assembly. Check White wire of main harness from engagement switch to transducer for continuity.
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