Standard Ignition TS-47 Engine Coolant Temperature Sender

Engine Coolant Temperature Sender for OE-Style Cooling Control

Standard Ignition TS-47 is an engine coolant temperature sender built for vehicles that use a coolant temperature indicator light on the dashboard. It uses a bolt-on design with a 1/2-14 NPT thread, a round plug-in connector, and a two-blade male terminal layout for straightforward replacement in the correct application.

For classic Chevrolet and GMC cooling systems, TS-47 is a direct-fit style sender for selected 1970-1974 models, including Chevrolet C10 Suburban, C20 Suburban, K10 Suburban, K20 Suburban, Bel Air, El Camino, and Impala, plus GMC G15/G1500 Van, G25/G2500 Van, G35/G3500 Van, and Jimmy. It also serves Pontiac Firebird and LeMans applications with a coolant temp light.

Key Features

• Engine coolant temperature sender for dash light applications
• Standard Ignition TS-47 part number for catalog matching
• Bolt-on mounting with 1/2-14 NPT thread size
• Round, plug-in connector with male terminals
• Two blade terminals for the specified electrical connection
• Factory-calibrated and tested for switch actuation at the target temperature
• Uses a formed bimetal contact arm for precise electrical switching

Detailed Description

Standard Ignition TS-47 is engineered for temperature-signal applications where the coolant warning light depends on accurate switch actuation. The sender uses a calibrated thermal design with a formed bimetallic contact arm, allowing the electrical signal to transfer at the specified lower-temperature set point. That makes it a practical choice for restoring proper warning-light operation on classic Chevrolet and GMC trucks, vans, and Pontiac passenger cars.

This part number is commonly referenced for 1970-1972 Chevrolet Impala, 1971-1972 Chevrolet Bel Air and El Camino, and 1974 Chevrolet C10 Suburban, C20 Suburban, K10 Suburban, and K20 Suburban. It also applies to 1974 GMC G15/G1500 Van, G25/G2500 Van, G35/G3500 Van, and Jimmy, as well as 1974 Pontiac Firebird and LeMans. This part cross-references 1T1058 and TS7227 for the same application.

Common Problems It Can Address

• Inoperative coolant temperature warning light
• Intermittent or inaccurate dash light activation
• Failed temperature sender causing no signal to the indicator circuit
• Replacement needs after corrosion or internal switch wear
• Restoration work on original-style Chevrolet, GMC, and Pontiac cooling systems

Installation Notes and Tips

Verify the vehicle uses a coolant temperature indicator light before ordering. Confirm the thread size, connector style, and terminal layout against the original sender, especially on older Chevrolet, GMC, and Pontiac applications. Clean the mounting surface and inspect the connector for corrosion before installation to help ensure a stable electrical connection.

Quality Assurance

Standard Ignition manufactures this sender with controlled materials, calibrated temperature settings, and production testing to confirm switch actuation at the specified temperature. The design and calibration process are intended to support consistent electrical contact in the correct application.