Driver cooling fan always on please help - Third Generation F-Body Message Boards

DFI and ECM Discuss all aspects of DFI (Digital Fuel Injection), ECMs (Electronic Control Module), scanners, and diagnostic equipment. Fine tune your Third Gen computer system for top performance.

Driver cooling fan always on please help

Thread Tools Search this Thread
Old 04-21-2017, 06:14 AM   #1  
Junior Member
Thread Starter
Join Date: Nov 2014
Location: Buffalo,ny
Posts: 7
Car: 1991 camaro z28
Engine: 305 tpi
Transmission: T-5
Axle/Gears: G80 G92 3.42

Driver cooling fan always on please help

I have a 91 z28 305 tpi and the cooling fan(driver side) is always on. So I pulled the ecm out (still connected to car)and gave it a jiggle and what do you know the fan went off when just the key was on (engine was never started) then I wiggle it again and the fan goes on. I can wiggle the ecm all day and the cooling fan will kick on and off like this . My question is this a wiring issue or do I need a new ecm??? There is a replacement ecm in the car now the po must have can I check that the ecm is grounded? Anyone else had this problem? Thanks in advance
KILLAZMOTO is offline   Reply With Quote
Old 04-21-2017, 12:19 PM   #2  
iTrader: (1)
Join Date: Mar 2002
Location: Chasing Electrons
Posts: 16,953
Car: check
Engine: check
Transmission: check

Re: Driver cooling fan always on please help

Most likely the ECM is bad. The pin on the ECM connector for the primary fan is E8. That will be the yellow connector.

RBob is offline   Reply With Quote

Go Back   Third Generation F-Body Message Boards >

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Featured Sponsors
Vendor Directory

1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92

All times are GMT -5. The time now is 05:42 AM.

All content copyright 1997 - 2018 All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of's Administrators.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: