3315424 - 1044DA Check fuel heater power supply
On the Examiner/SDC diagnostic instrument, select the instrument 'Voltmeter' with 20 V full scale.Place the leads on the fuel heater supply wires (see wiring diagram).Turn the ignition on and the voltage reading should be more or less the same as the battery voltage.If the reading is significantly below the battery voltage or zero, restore the correct supply to the fuel heater.On the Examiner/SDC, select the 'Ammeter' instrument in 1000 amp. clip mode. Connect the instrument's amperometric clip and set 100 amp. full scale.Connect the amperometric clip to the fuel heater's supply wire (see wiring diagram).Turn the ignition on and the reading should be 15 amp. or over. | The reading shows whether the test is positive or negative.Reading >= 15 amp., positive testReading < 15 amp., negative test |