* Under the hood in the fuse box: This is the most common location. The fuse box is typically located near the battery. Look for a box with a cover, often labeled "Fuse Box" or "Power Distribution Center." Inside, you'll find relays, fuses, and possibly other components. The relay itself will be a small square or rectangular component that might be clearly labeled "Wiper Relay" or have a symbol depicting windshield wipers. Consult your owner's manual's fuse box diagram for precise location.
* Inside the cab, under the dash: Less common, but possible in some models. Accessing this location requires removing some trim pieces under the dashboard. Again, your owner's manual will be your best guide.
Replacing the Wiper Relay:
1. Identify the Relay: Use your owner's manual's fuse box diagram to locate the correct relay. If unsure, carefully inspect relays to find one that appears to match descriptions online of a wiper relay for your vehicle.
2. Disconnect the Battery (Recommended): This is a crucial safety step to prevent accidental shorts or damage to your vehicle's electrical system.
3. Remove the Relay: Most relays are simply pushed into their sockets. Use a small flat-head screwdriver or your fingers to gently push the relay down and pull it out of its socket. Take note of its orientation (sometimes there's a small tab or marking).
4. Install the New Relay: Insert the new relay into the socket, ensuring it's correctly oriented, and push it in firmly until it clicks into place.
5. Reconnect the Battery: Reconnect the negative (-) battery terminal.
6. Test the Wipers: Turn on your wipers to verify that the replacement relay has solved the problem.
Important Considerations:
* Owner's Manual: Your 2003 Silverado owner's manual is your best resource. It will have a detailed fuse box diagram showing the location of all relays, including the wiper relay.
* Relay Number: The relay might be identified by a number on its casing or in the fuse box diagram. Having this number will help you obtain the correct replacement.
* Parts Store: When purchasing a replacement relay, provide the year, make, and model of your Silverado to ensure you get the correct part. Auto parts stores can often look this information up for you.
If you're uncomfortable working with car electronics, it's best to take your Silverado to a qualified mechanic to have the relay replaced. Improperly working with car electrical systems can cause damage.
