Cooling fan does not turn on

Tiny
DICKWHYTE
  • MEMBER
  • 1994 CADILLAC DEVILLE
I have a 4.9 engine with 150,000 miles. The cooling fan will not come on. I have changed the sensor but it still will not come on. What should I do?
Saturday, September 29th, 2007 AT 6:59 PM

2 Replies

Tiny
BUZZSAW
  • MECHANIC
  • 1,198 POSTS
Hello,

There are three cooling fan relays and a 50 amp maxi fuse that needs to be checked. Here is a guide to help you do some testing with a wiring diagram so you can see how the system works:

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

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.

Cheers
Was this
answer
helpful?
Yes
No
Tuesday, November 26th, 2019 AT 6:44 PM
Tiny
BISCUIT
  • MEMBER
  • 1 POST
I had this problem it ending up being the coolant fan relays and the fan motor. FYI
Was this
answer
helpful?
Yes
No
Tuesday, November 26th, 2019 AT 6:44 PM

Please login or register to post a reply.

Sponsored links