Standard Ignition TS-390 Engine Coolant Temperature Sender

Engine Coolant Temperature Sender Overview

Standard Ignition TS-390 is an engine coolant temperature sender built for gauge-equipped Ford, Mazda, and Mercury applications. It uses a direct attachment design with a female rectangular plug-in connector, brass and plastic finish materials, and a 2-blade male terminal layout for a secure electrical connection.

Fits 1998-2011 Ford Ranger, Ford Explorer, Ford Explorer Sport Trac, Ford Explorer Sport, Ford Taurus, Ford Escort, Ford Contour, Mazda B4000, Mercury Cougar, Mercury Sable, and Mercury Mystique with gauge-equipped engines where listed below.

Key Features

• Standard Ignition TS-390 engine coolant temperature sender
• Direct attachment method for specified OE-style applications
• Female rectangular plug-in connector with 1 connector
• 2 male blade terminals for electrical signal transfer
• Brass and plastic construction with gold and red color finish
• Factory-calibrated and tested for switch actuation at the specified temperature
• Uses a formed bimetal contact arm and creep-action design for precise performance

Detailed Description

The TS-390 is designed to send coolant temperature information to the gauge system in vehicles equipped with the correct sender style. Standard Ignition calibrates and tests each unit to confirm actuation at the specified lower-temperature set point, while the internal thermal design uses a bimetallic contact arm for consistent electrical switching. This part cross-references Stant 74183 for the same application. For Ford Ranger, Ford Explorer, and Mazda B4000 service work, Standard Ignition TS-390 provides the connector style and terminal layout needed for direct replacement in listed gauge applications.

Common Issues This Part Can Address

• Inaccurate or erratic coolant temperature gauge readings
• Gauge needle staying low, high, or fluctuating during operation
• Failed sender signal to the instrument cluster
• Electrical contact problems at the coolant temperature sender connection
• Replacement needs after corrosion or internal thermal switch wear

Installation Notes and Tips

Verify the vehicle uses a gauge-style coolant temperature sender before ordering. Match the connector shape, terminal count, and attachment method to the original part, and confirm the application notes for your exact year and engine setup. Fits 2002-2011 Ford Ranger, 2002-2009 Mazda B4000, 2002-2005 Ford Explorer Sport Trac, 1998-2003 Ford Escort, 2002-2003 Ford Explorer, 2002-2003 Ford Explorer Sport, 2003 Ford Taurus, 2003 Mercury Sable, 2000-2002 Mercury Cougar, 2001 Ford Explorer Sport, 2001 Ford Explorer Sport Trac, 2000 Ford Contour, 2000 Mercury Mystique, 1999 Ford Contour, and 1999 Mercury Mystique as listed.

Quality Assurance

Standard Ignition states that this sender is manufactured with complete quality control from component selection through finished product. Each unit is calibrated and tested during production to confirm the specified switching temperature and electrical contact performance.