Red 12 Volt Solenoid Relay 12V Heavy Duty SW3 SNL135 Fit Ford Starter Car Truck

12 Volt Solenoid Relay for Ford Starter Car Truck

This heavy duty 12 volt solenoid relay is an aftermarket replacement for starter systems, cross-referenced as SW3 and SNL135, built to engage the starter motor with a reliable high-current connection.

Overview

This 12 volt solenoid relay serves as a sturdy, dependable replacement for a failing starter relay in cars and trucks. The solenoid relay handles the high amperage needed to switch the starter on, sending power from the battery to the starter motor on each turn of the key. It suits drivers, mechanics, and restorers seeking a rugged solenoid relay that matches the SW3 and SNL135 reference points.

Built For Performance

• Heavy duty construction rated for 12 volt starter systems
• Cross-referenced to SW3 and SNL135 for easy matching
• Red finish for quick visual identification in the engine bay
• High-current terminals sized for starter cable loads
• Metal housing built to withstand under-hood heat and vibration

Fits These Machines

• for Ford starter applications on cars and trucks

On-The-Job Use

• Replacing a worn or clicking starter relay on a daily driver
• Restoring older Ford cars and trucks
• Keeping shop or farm vehicles starting reliably
• Servicing starter circuits in cold-weather conditions

Specs At A Glance

Good To Know

Q: How do I know if my solenoid relay needs replacing? A: Common signs include a single loud click with no crank, no click at all, or erratic starting. Testing the relay terminals with a multimeter confirms whether the coil and contacts are working.

Q: Is this a direct replacement for the SW3 or SNL135 unit? A: It is an aftermarket part built to those reference points, so compare terminal layout and mounting holes against your existing relay before ordering. Wiring position matters, so verify your vehicle uses a 12 volt system.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.