* Power Distribution Center (PDC) under the hood: This is the most common location. The PDC is a large fuse and relay box typically located near the battery, often on the driver's side fender well. The relay itself will be within this box. You'll need to consult your owner's manual or a wiring diagram specific to your truck's engine (e.g., 5.7L Hemi, 6.7L Cummins) to identify the correct relay. Look for a diagram in the owner's manual or online.
* On the starter itself (less common): In some rare instances, the relay might be mounted directly on the starter motor. This is less frequent in this model year.
To find it definitively:
1. Consult your owner's manual: This is the best starting point. It should have a diagram showing the location of the PDC and/or the starter relay.
2. Use a wiring diagram: Online resources or repair manuals provide detailed wiring diagrams specific to your truck's year, make, model, and engine. This is crucial for identifying the correct relay within the PDC.
3. Look in the PDC: If you've located the PDC, carefully examine the relays. Many are clearly labeled, but a diagram will help.
Important Note: Before working on any electrical components, disconnect the negative terminal of your battery to prevent electrical shocks or short circuits.
