1999 Chevy Tahoe ECT Sensor Circuit High Voltage

Tiny
BIGBOOMER
  • MEMBER
  • 1999 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 107,000 MILES
Where is the ECT Sensor located? How do you test to make sure this sensor is defective?
Tuesday, January 26th, 2010 AT 2:38 PM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Welcome to the forum. Thanks for the donation. My info says it is located, right front of engine, on or close to thermostat housing. The wiring colors are yellow and black. The yellow wire carries 5 volt reference. If you use a digital voltmeter, as the coolant warms up, that reading should slowly drop.

The black wire is a shared circuit for ground. It's not unheard of for another sensor to cause ground problems.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, January 26th, 2010 AT 3:20 PM

Please login or register to post a reply.

Related Coolant Temperature Sensor Content

Coolant Temperature Sender Replacement
VIDEO
Coolant Temperature Sender Replacement
Instructional repair video
Coolant Temperature Sensor
GUIDE
Coolant Temperature Sensor
An engine coolant temperature sensor also described as an ECTS (electronic coolant temperature sensor) is designed to tell the car's computer how hot the engine is running....
VIEW MORE

Sponsored links