Temperature gauge

2002 CHEVROLET BLAZER
176,000 MILES • 4.3L • V6 • 2WD • AUTOMATIC
Avatar
JK68
  • MEMBER
  • 11 POSTS
my temperature gauge would go from cold to hot. it will do this while you were driving. I changed the temperature sensor out and now the gauge does not work. Is there another sensor? I cannot see the gauge being bad, it would go from cold to hot. Thank you.
Mar 17, 2018 at 3:51 AM
Advertisement
Avatar
ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Did you change the one by the thermostat or the cylinder head? the one on the left cylinder head controls the gauge unit.

Roy
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Mar 17, 2018 at 4:56 AM
Avatar
JK68
  • MEMBER
  • 11 POSTS
i changed the one by the cylinder head.
Mar 18, 2018 at 1:19 AM
Avatar
ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Okay

Remove the wire from the sensor and see what the gauge does.
then ground the wire and see what it does.

Roy
Mar 18, 2018 at 5:31 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.