Test A: Starter Solenoid Does Not Click
NOTE:
The procedures within this test may refer to wiring information. When performing a test or repair on the systems wiring, see WIRING DIAGRAMS
.
- Did you preform the DIAGNOSTIC SYSTEM CHECK (ENGINE ELECTRICAL)? If yes, proceed to next step. If no, see DIAGNOSTIC SYSTEM CHECK (ENGINE ELECTRICAL) .
- Turn the ignition switch to the START position. Does the engine crank? If yes, see INTERMITTENT OR POOR CONNECTIONS . If no, proceed to next step.
- Turn the ignition switch to the START position. Does the starter motor relay click? If yes, go to step 7 . If no, proceed to next step.
- Remove the starter motor relay. Connect a test light from the supply voltage circuit of the starter motor relay coil circuit to ground. With the transmission in park, or clutch pedal depressed, turn the ignition switch to the START position. Does the test light illuminate? If yes, proceed to next step. If no, go to step 6 .
- Connect a test light from the supply voltage circuit of the starter motor relay coil circuit to the control circuit of the starter motor relay coil circuit. With the transmission in park, or clutch pedal depressed, turn the ignition switch to the START position. Does the test light illuminate? If yes, go to step 13 . If no, go to step 10 .
- Turn off ignition. Disconnect the Park Neutral Position (PNP) switch.
- For Allison transmission, see PARK/NEUTRAL POSITION SWITCH .
- For automatic transmission, see PARK/NEUTRAL POSITION SWITCH .
- For manual transmission, see CLUTCH START SWITCH .
- Turn off ignition. Disconnect the starter motor relay. Connect a test lamp between the battery positive voltage circuit of the starter motor relay switch circuit and a good ground. Does the test lamp illuminate? If yes, proceed to next step. If no, go to step 17 .
- Connect a 30 amp fused jumper between the battery positive voltage circuit of the starter motor relay switch circuit and the supply voltage circuit of the starter solenoid. Does the engine crank? If yes, go to step 13 . If no, proceed to next step.
- Does the fuse in the jumper open? If yes, go to step 18 . If no, go to step 12 .
- Test the control circuit of the starter motor relay for an open or high resistance. Did you find and correct the condition? If yes, go to step 23 . If no, go to step 19 .
- Test the supply voltage circuit of the starter motor relay coil circuit for an open or high resistance. Did you find and correct the condition? If yes, go to step 23 . If no, go to step 15 .
- Test the supply voltage circuit of the starter solenoid for an open or high resistance. Did you find and correct the condition? If yes, go to step 23 . If no, go to step 16 .
- Inspect for poor connections at the starter motor relay. Did you find and correct the condition? If yes, go to step 23 . If no, go to step 19 .
- If equipped with an automatic transmission, inspect for poor connection at the PNP switch harness connector. If okay, perform the park/neutral position switch adjustment.
- For automatic transmission, see PARK/NEUTRAL POSITION SWITCH .
- For Allison transmission, see PARK/NEUTRAL POSITION SWITCH .
- Inspect for poor connections at the ignition switch harness connector. Did you find and correct the condition? If yes, go to step 23 . If no, go to step 21 .
- Inspect for poor connections at the starter solenoid. Did you find and correct the condition? If yes, go to step 23 . If no, go to step 22 .
- Repair the open or high resistance in the battery positive voltage circuit of the starter motor relay switch circuit. When complete, go to step 23 .
- Repair the short to ground in the supply voltage circuit of the starter solenoid. When complete, go to step 23 .
- Replace the Starter Relay. When complete, go to step 23 .
- Replace the PNP switch. Replace the clutch pedal position switch.
- For Allison transmission, see PARK/NEUTRAL POSITION SWITCH .
- For automatic transmission, see PARK/NEUTRAL POSITION SWITCH .
- For manual transmission, see CLUTCH PEDAL REPLACEMENT .
- Replace the ignition switch. When complete, go to step 23 .
- Replace the starter. See STARTER . When complete, proceed to next step.
- Operate the system for which the symptom occurred. Did you correct the condition? If yes, system is okay. If no, go to step 2 .