97 gt frustrating fan issue


New Member
Dec 21, 2019
Big island va
Frustrated Husbands stang.97 gt with 99 4.6..bare w/me trying to help hubby.the initial problem was the hose to temp sensor thats located on back,busted.replaced hose&sensor.never overheated but temp to high.so replaced thermostat.still to high.tested fan.runs with front temp sensor unpluged.replaced temp sensor&harness.still to high.water pump and radiator was replaced about a year ago.we have read about ccrm,is this our last resort?and if box is bad,wouldnt it effect fuel pump(replaced),clutch(replaced) and the other relays associated?cause those things are fine.ty in advanced for any advice
  • Sponsors(?)


Drone Driver
Mod Dude
Mar 2, 2003
Sea of Tranquility
Are you saying the car is not overheating but temps are high? If you lost coolant you need to "burp" the system. Air gets in and causes it to overheat.


New Member
Dec 21, 2019
Big island va
Are you saying the car is not overheating but temps are high? If you lost coolant you need to "burp" the system. Air gets in and causes it to overheat.
Yeah the car is NOT overheating but temps rise high,especially in city,in a drive thru ect.fine when at high speeds like highway.

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
polk county florida
The cooling fan has two speeds. it may be only on low speed and not switching to high.
you can also install a manual temperature gauge temporarily to compare to the factory gauge.


SN Certified Technician
Aug 14, 2009
Houston Texas
I have helped more than one person who THOUGHT they had an over heating problem that turned out to be electrical in nature. IE a poor ground CAUSING a false high temperature reading. In some cases people "part swapped" the complete fan control and cooling system before reaching out for help.

Recommendation. Don't load up the parts cannon in an attempt to "part swap" to a solution. Cover the basics first. Test as much as possible. Then repair.

Howto perform charging system voltage drop test

Confirm that the cooling fan works on BOTH speeds. One method is to test by jumping the fan directly from battery power.

NOTE, the CCRM is multiple relays under one cover. It's quite possible for one relay to fail while the others work fine.

Hands down the easiest way to test this is with a bi-directional ODB2 scanner. With a bi-directional ODB2 scanner it's possible to "command" the various speed fans to run and then actually see what happens.

Even without bi-directional control just being able to see the various PID's such as ECT and called for fan speed are very helpful in trouble shooting.

Here's some information on an affordable Windows based unit.
ForScan ODB2 scanner w ELM327 USB
Last edited:
  • Useful
Reactions: General karthief
Thread starter Similar threads Forum Replies Date
joetrainer31 Engine Cooling Fan Frustration 1994 - 1995 Specific Tech 13
Pakrat Fan Shroud frustrations!!!!!!!!! Classic Mustang Specific Tech 16
LX Dave Holley Sniper review - The good, the bad, and learn from my frustration 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 6
A Electrical Turn signal relay 2010 - 2014 Specific Tech 0
B 2008 GT frustrating electrical prob? 2005 - 2009 Specific Tech 1
94Silverbullet Looking for an honest reliable shop - frustrated... 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 5
D Motor/trans Swap Frustrations Fox 5.0 Mustang Tech 1
Keith5.0GT Frustrating Foxbody Speedo Fox 5.0 Mustang Tech 36
D Durden Disc Brakes . . . Completely Utterly Frustrated Classic Mustang Specific Tech 26
rabidscoobie Drivetrain So Frustrated Right Now. SN95 4.6L Mustang Tech 23
88mustang on a budget 88 Gt Hatch The Welcome Wagon 10
DonSoares Steering Rack Frustrations Fox 5.0 Mustang Tech 5
L Frustration With 2014 Gt (5.0 Motor Noise And Performance) 2010 - 2014 Specific Tech 5
Old Skooler Trying To Recover From Project Frustration 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 3
7991LXnSHO Daily Driver Frustration Vent 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 14
FoxatHeart Frustrated... 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 32
Old Skooler Getting Frustrated! 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 17
deathb4dismount do we overvalue our cars??? frustrated 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 69
TheShabz Stripe Frustration Mustang Sound & Shine All 7
99FiveOh Need To Vent, Frustrated! 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 6
3 Frustrating problem when getting gas... Fox 5.0 Mustang Tech 7
X Frustrating Problem Classic Mustang Specific Tech 17
P A little frustrated... 1996 - 2004 SN95 Mustang -General/Talk- 5
S cooling system frustration!!! 1994 - 1995 Specific Tech 10
0 Frustrated with Mach 1 Grille Delete 1996 - 2004 SN95 Mustang -General/Talk- 26
S Wheel frustration Classic Mustang Specific Tech 16
HotFox New car Frustration funny video 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 4
ras50gt Clutch Cable Frustration, please help Fox 5.0 Mustang Tech 6
6 Unisteer Power Steering Pump Frustrations Classic Mustang Specific Tech 5
xr8d302 Frustrated, require bolt sizes 1994 - 1995 Specific Tech 8
T Altenator/ charging issue.. FRUSTRATED! help! Fox 5.0 Mustang Tech 1
G frustrated with edelbrock/AFR 165 setup Fox 5.0 Mustang Tech 15
stangsky Frustrated, need help. Classic Mustang Specific Tech 13
F Wiring/Mechanich Frustration 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 4
G Frustration! What do I need to put a GT-style grille on a V6? 2005 - 2014 Specific V6 Tech 6
pudman 86 gt rear brake frustration Fox 5.0 Mustang Tech 4
88-378 Frustrated!! Quick question Fox 5.0 Mustang Tech 10
N Won't start/helping a friend/FRUSTRATED! 2.3L (N/A & Turbo) Tech 1
PNW LSC What's this Annoying, Frustrating, and Impossiible to Find Noise? Fox 5.0 Mustang Tech 1
2 Getting Frustrated with Latemodel Restoration 1996 - 2004 SN95 Mustang -General/Talk- 34
I Frustrations !!! 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 3
F Hot Rod Cams frustrations: Can Anybody Help?! 2005 - 2009 Specific Tech 4
jivepepper So frustrated with electrical gremlins SN95 4.6L Mustang Tech 4
Grandmaster Very frustrating brake pad install... 1994 - 1995 Specific Tech 10
Pokageek Ok...so I have been so frustrated getting over 400rwhp..I may just go for 500. Howto? 1994 - 1995 Specific Tech 38
TheGrayt1 Low RPM misfire from 1k-2k RPM's PLEEASE HELP!!! Frustrated SN95 4.6L Mustang Tech 30
MikeROD16 Extremely frustrated!!!! Fox 5.0 Mustang Tech 5
TrueBlue95GT Puzzled and Frustrated 1994 - 1995 Specific Tech 0
ShadowFist Frustrating Brake Problem-need help Classic Mustang Specific Tech 4
stangdude2000 REALLY frustrated - WAYYY Off topic 2005 - 2014 S-197 Mustang -General/Talk- 8
Similar threads