Standard Ignition TS-190 Engine Coolant Temperature Sender

Engine Coolant Temperature Sender for Indicator Light Applications

Standard Ignition TS-190 is an engine coolant temperature sender built for vehicles that use a dashboard coolant temperature indicator light. It uses a calibrated thermal design with a formed bimetal contact arm and factory-set actuation points for consistent electrical signaling. This TS-190 coolant temperature sender is a direct-fit service part for select Chevrolet, Buick, Pontiac, Oldsmobile, Geo, and related applications.

• Engine coolant temperature sender for indicator light systems
• 1/4-18 NPT thread size for listed applications
• Bolt-on attachment method
• 1 male connector with round plug-in design
• 1 female bullet terminal
• Factory-calibrated and tested for switch actuation at the specified temperature
• Thermal switch design uses a wax and bimetal contact system for precise operation

Detailed Product Overview

Standard Ignition TS-190 is engineered for coolant temperature warning-light circuits rather than gauge-style temperature monitoring. The sender is calibrated to make electrical contact at the lower-temperature set point required by the application, helping the dash light respond as designed. Its robust construction and controlled manufacturing process support consistent performance in service environments. This part number, TS-190, is commonly searched for replacement needs on older GM platforms including Chevrolet Lumina, Chevrolet Cavalier, Buick Regal, Pontiac Grand Prix, and Oldsmobile Cutlass Supreme.

This part cross-references Four Seasons 37937 for the same application.

What This Part Helps Address

• Coolant temperature warning light staying on or not illuminating
• Incorrect temperature signal to the fan controller or indicator circuit
• Failed sender causing unreliable dash light operation
• Temperature switch issues on vehicles with 1/4 inch x 18 thread senders
• Replacement needs for aging GM cooling-system electrical components

Installation Notes and Fitment

Install TS-190 only on vehicles listed with a coolant temperature indicator light on the dashboard and the correct 1/4 inch x 18 thread specification. Verify connector style, terminal type, and thread size before installation. This sender is listed for applications such as Fits 1993-1997 Chevrolet Lumina, N/A; Fits 1994-1995 Geo Tracker, N/A; Fits 1992-1995 Oldsmobile Cutlass Supreme, N/A; Fits 1991-1993 Buick LeSabre, N/A; Fits 1988-1993 Buick Regal, N/A; Fits 1991 Pontiac Firebird, N/A; Fits 1988-1991 Pontiac Grand Prix, N/A; Fits 1991 Pontiac Sunbird, N/A; Fits 1987-1990 Pontiac 6000, N/A; Fits 1989 Chevrolet Corsica, N/A; Fits 1988 Buick Century, N/A; Fits 1988 Chevrolet Cavalier, N/A; Fits 1988 Chevrolet Corsica, N/A; Fits 1988 Oldsmobile Cutlass Cruiser, N/A; Fits 1987 Buick Century, N/A; Fits 1987 Chevrolet Celebrity, N/A; and Fits 1987 Oldsmobile Cutlass Ciera, N/A. For Chevrolet Lumina, Chevrolet Cavalier, and Oldsmobile Cutlass Supreme applications, confirm the vehicle is equipped with the coolant temperature indicator light configuration noted in the fitment data.

Quality Assurance

Standard Ignition states that each unit is calibrated and tested to confirm switch actuation at the specified temperature. The design uses high-grade materials, controlled wax formulations, and factory quality checks throughout production to support consistent electrical performance.