The Standard Ignition TS-66 switch for the 1988-1990 Chevrolet C1500 and other vehicles is an engine coolant temperature sender for the dash warning light. It makes electrical contact at its specified temperature to switch on the temperature light.
- Made by a global manufacturer of original equipment ignition products, with quality control from componentry to finished product.
- Each unit is calibrated and tested to confirm the switch actuates at its specified temperature.
- Built from high-grade materials to meet the demands of today's service professionals.
- A formed bimetallic contact arm moves as two metals fused together expand at different rates.
A temperature light that stays lit on a cold engine or never lights can mean this switch has failed, though a chafed switch wire or a burned-out warning bulb can do that too, so trace the fault before ordering.
The 1988-1990 Chevrolet K1500 and the 1980-1985 Chevrolet Impala are among the vehicles this switch is a direct fit for, along with a wide range of Buick, Cadillac, GMC, Oldsmobile, Pontiac and American Motors models. If your car isn't named here, look it up in the "Vehicles it fits" section.
Specifications
Fit and size
- Thread: 3/8-18
- Terminal: single male blade
Build and materials
- Type: with light, for a dash temperature warning light
- Contact: formed bimetallic contact arm
Interchange: 19239402 · 33001542 · WT357 · 8343 · TU64 · TS6637 · 25036035 · 25036042 · 25036136 · 25036300 · 25036324 · 25036371 · 25036452 · 25036468 · 25036535 · 25037175 · 25037176 · 8992347 · 8993427
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
19239402, 33001542, WT357, 8343, TU64, TS6637, 25036035, 25036042, 25036136, 25036300, 25036324, 25036371, 25036452, 25036468, 25036535, 25037175, 25037176, 8992347, 8993427
Frequently Asked Questions
Is the TS-66 the right 1980-1985 Chevrolet Impala switch?
Yes, the Standard Ignition TS-66 switch fits the 1980-1985 Chevrolet Impala; for a different vehicle, the "Vehicles it fits" section shows whether it is covered.
What thread and terminal does the Standard Ignition TS-66 switch have?
The Standard Ignition TS-66 switch has a 3/8-18 thread and a single male blade terminal.
Does this TS-66 switch run a temperature gauge or a warning light?
This switch is a with-light unit. It makes electrical contact at its specified temperature to turn on the dash temperature warning light, and it is not a gauge sender.
What can a flickering temperature light mean for this coolant temperature switch?
A light that flickers or comes on when the engine isn't hot can mean this switch is failing. Coolant seeping at its threads, seen with the engine off and cool, is another sign.
How does the bimetallic contact arm in this switch work?
In this switch's formed bimetallic contact arm, two metals fused together expand at different rates as they heat, and that difference moves the arm. Each unit is calibrated and tested to actuate at its specified temperature.
