The message to which you are about to reply is shown first. GO TO REPLY FORM



 VIEW    REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

V70 cooling fan not working V70-XC70 1998

posted by  steve in colorado on  Mon Dec 10 10:36 CST 2007
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Wed Jun 26 18:39 CST 2013
[RELATED]

1998 V70R
The engine cooling fan does not turn when engine is at hot temperature. I checked the following: fan spins freely by hand, fan runs when I jumper 12v directly to the fan plug (both speeds), 12v is OK at input to fan relay, with engine running and AC on there is no ground signal to the input of the relay (either wire), with engine running at hot temp there is no ground signal to the input of the relay (either input wire), when I ground the "fan relay ground input" the fan runs (both speeds), and temperature gauge functions normally in instrument panel. At hot engine temperature, when the fan should turn on, there is a fairly loud "jet engine" noise for a few seconds then shuts off - but still the fan does not turn. I'm not sure where that "jet engine" noise is originating from. What resistances should the coolant temp sensor read at cold and at hot? Are there any tests that can be done on the engine computer to look for a ground signal going to the fan relay? Where is the engine computer located? Any suggestions would be greatly appreciated. Thanks!






USERNAME
Use "claim to be" below if you don't want to log in.
PASSWORD
I don't have an account. Sign me up.
CLAIM TO BE
Use only if you don't want to login (post anonymously).
ENTER CAPTCHA CODE
This is required for posting anonymously.
OPTIONS notify by email
Available only to user accounts.
SUBJECT
MODEL/YEAR
MESSAGE

DICTIONARY
LABEL(S) +
IMAGE URL *
[IMAGE LIBRARY (UPLOAD/SELECT)]

* = Field is optional.

+ = Enter space delimited labels for this post. An example entry: 240 muffler


©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.