Diagnosing Starter Cranking Problems | BorgWarner Delco Remy Genuine Products Tech Tip

While cranking problems can be frustrating, but identifying and correcting the root cause does not have to be. The first step is to identify the symptoms. In a cranking system, you can divide your symptoms into one of three possible troubleshooting categories: - Click No-Crank: The solenoid clicks but the starter doesn't crank. - No-Click No-Crank: The solenoid doesn't click and the starter doesn't crank. - Slow Crank: The starter will crank, however, the engine RPM is slow to start the vehicle. --- http://delcoremy.com --- Delco Remy starters and alternators from BorgWarner are the preferred choice for medium and heavy-duty truck, bus and off-highway applications worldwide. Learn more at http://delcoremy.com. Delco Remy is a registered trademark of General Motors Corporation, licensed to BorgWarner PDS (Anderson) L.L.C. --- http://delcoremy.com --- [ How to Diagnose Starter Cranking Problems: Slow Crank ] Step 1: Identify the symptoms. Click no-crank, no-click no-crank, or slow crank. Step 2: Charge the batteries and perform a battery load test on the battery bank Step 3: If the load test fails, individually test each battery and replace any faulty batteries Step 4: Then perform a voltage drop test on the starter main cables. The starter voltage drop should be less than 0.5 volts drop total on the cranking circuit Step 5: Diagnose the problem, by answering the following questions: Is the control circuit working? Are battery and cable tests within specifications? If you answered yes to both of these questions and the vehicle is still cranking slowly, it’s a slow crank issue and the starter needs to be replaced. [ How to Diagnose Starter Cranking Problems: Click No-Crank ] Step 1: Identify the symptoms. Click no-crank, no-click no-crank, or slow crank. Step 2: Charge the batteries and perform a battery load test on the battery bank Step 3: If the load test fails, individually test each battery and replace any faulty batteries Step 4: Then perform a voltage drop test on the starter main cables. The starter voltage drop should be less than 0.5 volts drop total on the cranking circuit Step 5: Inspect the control circuit; if the starter does not contain an integrated magnetic switch (IMS), then a voltage drop test will need to be performed on the vehicle control circuit. If the vehicle does not have an IMS, the technician will have to verify that the vehicle’s control circuit is providing voltage to the starter IMS Step 6: When all systems have been checked and the starter is determined to be the cause, the ring gear should also be inspected for damage. --- http://delcoremy.com --- Safety Reminder The various electrical systems within a vehicle are highly charged and may include corrosive, poisonous, and hazardous materials. To remain safe, you must: - Know where the nearest eye wash station is located - Always wear eye protection - Remove any metallic items that could create an electrical charge including watches and jewelry - Never smoke near batteries - Never use batteries as a tool rest - Dispose of batteries properly when necessary - Follow usual safety precautions near rotating machinery --- http://delcoremy.com ---

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