DR-8C Throttle Position Sensor Wires to Logic Module
1. With diagnostic read-out tool connected to engine test connector, disconnect throttle body connector.
2. Place system in Sensor Test Mode 05. Note that display readings must be divided by 10.
3. Connect a jumper wire between orange/blue wire of throttle body connector and negative battery terminal.
4. If display reads zero volts, locate and repair open circuit in black/light blue wire of throttle body connector to engine harness splice.
5. If display reads five volts, locate and repair open circuit in orange/blue wire of throttle body connector to logic module.