Dorman 645-156 Oil Pressure Switch Connector

Dorman Oil Pressure Switch Connector 645-156

Dorman 645-156 is an oil pressure switch connector built to match the original hardware on specified Ford, Lincoln, and Mercury applications. It uses quality materials for dependable electrical connection and durable service in demanding underhood conditions.

• Oil pressure switch connector for electrical repair and replacement
• OE-style shape and function for specified applications
• Plastic connector body with a rectangular profile
• Male connector with female pressure-contact terminal
• 11.5 in. wiring harness length with 14-gauge wire
• Water resistant design for added protection in exposed locations
• Connector length: 0.93 in.

Application Coverage

Compatible with a wide range of Ford, Lincoln, and Mercury vehicles, including Ford Explorer, Ford F-150, Ford Fusion, Ford Taurus, Lincoln MKZ, and Mercury Grand Marquis applications. This part number, 645-156, is also used across many Ford truck, van, and passenger car platforms from 1996 through 2019.

This part cross-references Standard Ignition S-940 for the same application.

Detailed Description

When the original oil pressure switch connector is damaged, corroded, or no longer making a secure electrical connection, Dorman 645-156 provides a direct replacement solution for the affected circuit. The connector is engineered to match the appearance and function of the factory piece, helping restore a stable connection at the oil pressure switch. Its rectangular plastic housing, single-wire layout, and pressure-contact terminal design support a clean repair on many Ford, Lincoln, and Mercury vehicles.

Use this connector on applications such as Ford Explorer, Ford F-150, Ford Fusion, Ford Taurus, Lincoln MKZ, and Mercury Grand Marquis when the original connector has heat damage, broken locking features, or terminal wear. The Dorman 645-156 part number is a practical choice for technicians and do-it-yourself repairs that require an OE-style electrical connector replacement.

Common Repair Uses

• Broken or cracked oil pressure switch connector housing
• Corroded terminals causing intermittent signal loss
• Heat-damaged wiring at the oil pressure switch
• Loose or unreliable electrical contact at the sensor
• Connector replacement during engine harness repair

Installation Notes and Tips

Inspect the oil pressure switch, nearby wiring, and terminal condition before installation. Match the connector orientation and verify the harness routing allows enough slack for a secure repair. Use proper electrical repair practices when splicing and sealing the harness to maintain a reliable connection.

Quality Assurance

Dorman designs this connector to match original hardware appearance and function on specified applications, using quality materials for reliable performance and durability.