Standard Ignition TS-49 Engine Coolant Temperature Sender - Right

Engine Coolant Temperature Sender for GM Applications

The Standard Ignition TS-49 engine coolant temperature sender is built for vehicles that use a dashboard coolant temperature indicator light. It features a black body, brass finish, male plug-in connector, and two blade terminals for a direct electrical connection in the specified applications.

Fits 1970-1974 Chevrolet Monte Carlo, 1971-1974 Chevrolet Bel Air, 1972-1974 Chevrolet C10 Suburban, 1972-1974 Chevrolet C20 Suburban, 1972-1974 Chevrolet K10 Suburban, 1972-1974 Chevrolet K20 Suburban, 1972-1974 Chevrolet Nova, 1972-1974 Pontiac LeMans, 1973-1974 Chevrolet Blazer, 1973-1974 Chevrolet Caprice, 1973-1974 Chevrolet El Camino, 1973-1974 Chevrolet Impala, 1973-1974 Chevrolet Malibu, 1973-1974 Chevrolet Monte Carlo, 1973-1974 Chevrolet Nova, 1973-1974 GMC Jimmy, 1973-1974 Oldsmobile Omega, 1973-1974 Pontiac Firebird, 1973 Chevrolet Caprice, 1973 Chevrolet El Camino, 1973 Chevrolet Impala, 1973 Chevrolet Malibu, 1973 Chevrolet Monte Carlo, 1973 Chevrolet Nova, 1973 GMC G15/G1500 Van, 1973 GMC G25/G2500 Van, 1973 GMC G35/G3500 Van, 1973 Oldsmobile Delta 88, and 1974 Chevrolet Blazer.

Key Features

• Standard Ignition TS-49 engine coolant temperature sender
• Black housing with brass finish
• Male connector with plug-in design
• 2 blade terminals for dashboard light circuits
• Factory-calibrated and tested for specified actuation temperature
• Uses a formed bimetallic contact arm for precise switching action

How It Works

This coolant temperature sender uses thermal switching principles to signal the fan controller or indicator circuit at the specified temperature point. Standard Ignition calibrates each unit during production and tests switch actuation to help maintain consistent electrical contact in the intended GM applications. The TS-49 is a direct-fit style sender for vehicles that rely on a coolant temperature warning light rather than a gauge-style sender.

This part cross-references 1T1083 and TU49 for the same application.

Common Problems It Can Help Solve

• Inoperative coolant temperature warning light
• Intermittent temperature signal to the fan controller
• Incorrect or delayed switch actuation at the sender
• Corroded or worn blade-terminal electrical connection
• Temperature light circuit faults on classic Chevrolet, GMC, Pontiac, and Oldsmobile vehicles

Installation Notes

Verify the vehicle uses a coolant temperature indicator light and a 2-blade terminal sender before installation. Match the connector style and terminal layout to the original unit, and inspect the harness plug for corrosion or looseness. Confirm the sender threads and sealing surface are clean before tightening to the manufacturer’s specification.

Quality Assurance

Standard Ignition controls the manufacturing process from component selection through finished-product testing. Each TS-49 sender is calibrated and checked for switch actuation at its specified temperature to support consistent performance in service.