SPONSORED LINKS

My engine is overheating?

Tiny
COOLRIDGEDUG
  • MEMBER
  • 2008 CHEVROLET UPLANDER
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 200,000 MILES
Overheating. Temperature sensor located in head has been replaced and relays exchanged for known good ones. High speed and low speed fans both work when wired directly. When van gets hot high speed fans not coming on. I also swapped the Ecm with a parts van I have and no change in the issue. Where is the sensor for the high speed fans located? Thanks
SPONSORED LINKS
Monday, April 3rd, 2017 AT 12:40 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,722 POSTS
Hello,

There is three fan relay's that control the system, either one has gone out or you have a wiring problem here is a wiring diagram and a guide to help you fix the problem.

https://www.2carpros.com/articles/how-to-check-wiring

and

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Please run some tests and get back to us so we can continue helping you.

Best, Ken

Images (Click to make bigger)
Thumb
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
-1
Thursday, April 6th, 2017 AT 4:19 PM

Please login or register to post a reply.

Related Engine Overheat Content

Is Your Engine Cool Enough to Check?
VIDEO
Is Your Engine Cool Enough to Check?
Instructional repair video
Overheating Symptoms
GUIDE
Overheating Symptoms
An overheating engine is never a good thing to have happen. If the problem is caught quickly you can save the headache of a major engine repair. Knowing the information from...
VIEW MORE

Sponsored links