Keep tabs on engine temperature with the Standard Ignition switch TS-49, a coolant temperature sender that works with the dash temperature warning light on classic GM vehicles. It is a direct-fit replacement for many vehicles, including the 1973-1974 Chevrolet Impala. See the Buyer's Guide tab for the full list of applications and for engine details.
This part is cataloged both as an engine coolant temperature sender and as a temperature switch. It reads engine coolant temperature and makes electrical contact once its set point is reached, which signals the warning light. If the original sender has failed, TS-49 replaces it.
- Quality control throughout: Standard Ignition is a global manufacturer of original equipment ignition products. It controls quality through the whole manufacturing process, from components to the finished product.
- Calibrated and tested: Every unit is calibrated and tested to confirm the switch actuates at its specified temperature.
- Factory-set contact point: Each thermal switch is factory-calibrated to make electrical contact at the specified lower-temperature set point.
- Built for the shop: A robust design and high-grade materials are intended to meet the demands of today's service professionals.
A sender may need replacing if the warning light stays on with a cool engine, never comes on, or flickers on and off. Wiring and connector faults can cause the same signs, so test the circuit before you replace the sender.
Interchange: WT341 · 6489603 · TU49 · TS6629 · 6489779 · 6489903 · 6490454
This part cross-references / interchanges with the following part numbers:
WT341, 6489603, TU49, TS6629, 6489779, 6489903, 6490454
