318ti.org forum

Go Back   318ti.org forum > Technical, Maintenance and Modifications > Electrical

Notices

Electrical All wiring questions.

.
» Recent Threads
1999 M-Sport For Sale
12-31-2023 05:10 PM
Last post by Coop540iT
03-23-2024 06:39 PM
1 Replies, 97,908 Views
Once again 318ti owner...
03-20-2024 12:39 PM
Last post by two30grain
03-22-2024 02:04 PM
1 Replies, 60,771 Views
What brakes do I...
03-20-2024 03:27 PM
Last post by huirtera
03-20-2024 03:27 PM
0 Replies, 58,116 Views
Reply Share/Bookmark
 
Thread Tools Display Modes
Old 05-19-2009, 01:45 AM   #1
cracker red
Senior Member
 
Join Date: Apr 2009
Location: Atlanta
Posts: 159
iTrader: (0)
Default Fan "stuck" on high

Still waiting in the dark for my bently manual....

The fan comes on high as soon as you turn the key on. Unplugging the temp sensor in the rad won't make it turn off, nor will unplugging the temp sensor in the head.

My fan is stuck on high. Pulling the purple fan relay will cause the fan to go off. Turning on the AC (with the purple relay out) won't kick the fan on. Swapping in a yellow relay in place of the purple one will kick the fan back on.

Something is telling the high fan to come on as soon as the car is powered up.

Ideas?
cracker red is offline   Reply With Quote
Old 05-19-2009, 02:32 AM   #2
tiFreak
Senior Member
 
Join Date: Sep 2007
Location: asdfasdf
Posts: 10,002
Vehicles
iTrader: (8)
Default

it's possible that the fan wasn't operating right before you got it, so rather that fix it correctly the PO just rigged it up so that it's on all the time, I'd start by checking the wiring harness for electrical tape, heatshrink or butt connectors
tiFreak is offline   Reply With Quote
Old 05-19-2009, 07:56 AM   #3
turbo5s
Member
 
Join Date: Sep 2008
Location: norcal
Posts: 34
iTrader: (0)
Default

maybe you have to jumper the plug to the rad temp sender.. maybe a/c high pressure switch? So it sounds like a bentley manual is the way to go, I was hoping the electronic manual off ebay was going to have wiring diagrams but no..
turbo5s is offline   Reply With Quote
Old 05-19-2009, 11:40 AM   #4
Philly
Senior Member
 
Philly's Avatar
 
Join Date: Aug 2006
Location: maritimes
Posts: 1,433
iTrader: (0)
Default

Does it stay on even with the car going? cold or warm? or just when your put the key "on"?
__________________
11/97 Base


328Ti

Philly is offline   Reply With Quote
Old 05-19-2009, 01:07 PM   #5
J!m
Moderator
 
J!m's Avatar
 
Join Date: Jun 2003
Location: Bouncing off the rev limiter in CT!
Posts: 3,156
Vehicles
iTrader: (1)
Default

Sounds like a wiring issue for sure. Since the relay has been eliminated (although I would prefer a correct relay for the test).

Wiring has already been mentioned.

Is this a stock ti? If so, pull fuses until yoiu find the one or two that kill the fan.

Then check the wiring diagram (I have them if you [or anyone else] needs them) to see how it SHOULD be for your year car. It might be something as simple as the engine harness being changed to fix some other problem and the incompatibility is sending an A?C on signal all the time to the fan...
__________________
"Speed's just a question of money. How fast you 'wanna go?"

Order Swap Manuals Here => http://www.318ti.org/forum/showthread.php?t=12912

WolferJ- gone but not forgotten. R.I.P.
J!m is offline   Reply With Quote
Old 05-19-2009, 02:19 PM   #6
cracker red
Senior Member
 
Join Date: Apr 2009
Location: Atlanta
Posts: 159
iTrader: (0)
Default

Just when the key is "on". Cold or hot, always on.

Stock TI, I just replaced the engine wiring harness as I bought the car with a melted on. PO (or "mechanic") had wired in a universal O2 sensor wrong, shorting/melting the harness.

When I go to swap the car, I'm tempted to replace the front harness from the bay (body harness) if it's a separate piece from the interior/behind dash harness.
cracker red is offline   Reply With Quote
Old 05-19-2009, 02:43 PM   #7
J!m
Moderator
 
J!m's Avatar
 
Join Date: Jun 2003
Location: Bouncing off the rev limiter in CT!
Posts: 3,156
Vehicles
iTrader: (1)
Default

What year is it?

I think I still have a stock ti harness (4/1998) kicking around somewhere...

If that is good for you, I will see if I can find it.

Not this weekend as I am traveling, but next week perhaps...
__________________
"Speed's just a question of money. How fast you 'wanna go?"

Order Swap Manuals Here => http://www.318ti.org/forum/showthread.php?t=12912

WolferJ- gone but not forgotten. R.I.P.
J!m is offline   Reply With Quote
Old 05-19-2009, 04:26 PM   #8
cracker red
Senior Member
 
Join Date: Apr 2009
Location: Atlanta
Posts: 159
iTrader: (0)
Default

Sure, let me know

-ps, PM box is full
cracker red is offline   Reply With Quote
Old 05-19-2009, 05:01 PM   #9
Xenocide
Senior Member
 
Join Date: Aug 2008
Location: Raleigh/Charlotte, NC
Posts: 1,233
iTrader: (2)
Default

cracker - the harness I sold you will be the only one you will be able to use since you have an M42, you can only use a 1995 Ti harness. I can't remember if the fan connector is on the body or the engine harness, but get your manual out and trace the connection back to the fuse box, make sure you have a proper connection and go from there.
__________________
-Jeff
Xenocide is offline   Reply With Quote
Old 05-19-2009, 05:03 PM   #10
J!m
Moderator
 
J!m's Avatar
 
Join Date: Jun 2003
Location: Bouncing off the rev limiter in CT!
Posts: 3,156
Vehicles
iTrader: (1)
Default

Fan connector is on the body harness...

PM box cleared out too...

Sounds as if you can't use my harness anyway, if you have a 95 ti..
__________________
"Speed's just a question of money. How fast you 'wanna go?"

Order Swap Manuals Here => http://www.318ti.org/forum/showthread.php?t=12912

WolferJ- gone but not forgotten. R.I.P.
J!m is offline   Reply With Quote
Old 05-23-2009, 04:56 AM   #11
cracker red
Senior Member
 
Join Date: Apr 2009
Location: Atlanta
Posts: 159
iTrader: (0)
Default

Thought I had this one licked....

I had the oil pressure sensor plug and another one swapped. Is the front sensor in the head is for the gauge, and the other sensor is for the ECU coolant temp?

In any case, I now have a working oil pressure idiot light, and the car runs about 200% better now that the ECU is fueling the car based upon the correct temp. Weird.....I haven't replaced the front knock sensor but the check engine light is out now..

Now that I think about it... I'm wondering if I've got the gauge and ecu temp sensor leads swapped around. Can someone verify the gauge sensor as the front one, and that the colors are brown black and brown red?

RealOEM just has them listed as "temp sensor" and "Engine coolant sensor"
cracker red is offline   Reply With Quote
Old 09-23-2009, 05:13 PM   #12
Bills86e
Senior Member
 
Join Date: Apr 2009
Location: TampaBay, Florida
Posts: 104
iTrader: (0)
Default

What turns the HIGH speed fan on is the AC switch. When the compressor runs, so is HSF. The temp sensor switch on radiator
regulates its on/off after the signal. ECM 68 operates the low
SF signal. My LSF connector melted and now I get no LS signal from ECM black/green. As far as relays, they can fail in the open or closed position. Shut off your AC and see if fan quits.
Bills86e is offline   Reply With Quote
Old 09-23-2009, 05:26 PM   #13
cracker red
Senior Member
 
Join Date: Apr 2009
Location: Atlanta
Posts: 159
iTrader: (0)
Default

Thanks Bill, but shutting off the AC doesnt cause the fan to quit running.

I've messed with it all I'm going to....it's not hurting anything at this point so for all I care it can run as much as it wants.
cracker red is offline   Reply With Quote
Old 09-23-2009, 06:22 PM   #14
Bills86e
Senior Member
 
Join Date: Apr 2009
Location: TampaBay, Florida
Posts: 104
iTrader: (0)
Default

In engine compartment in dr side box is purple HSF relay ++0113.
My LS is out/replaced so if ya need a HS if yours frys, look me up! I should have done that (?) to Mine, and not worry! I think my LS burned my ECM internal.
Bills86e is offline   Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Alternative to high "GAS COST" anthony tyler General Chit Chat 25 10-03-2008 11:04 AM
PICS...Latest project "Hidden Garage Door Opener" VROOMCP Lounge 23 10-02-2008 09:53 AM
Any ultra high performance summer tires for 15"? Chris F. Wheels and Tires 11 03-16-2008 08:12 PM
For you I.T. geeks: "Audi's new luxury cars engineered on Linux" roadrash Lounge 26 01-04-2007 07:08 PM
"repair shop" rear shock mounts from turner motorsport iananderson02 Suspension 1 12-02-2005 09:28 PM


All times are GMT +1. The time now is 03:43 PM.


.
Powered by site supporters
vBulletin Version 3.8.8
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©1999 - 2024, 318ti.org
© vBadvanced CMPS v3.2.2
[page compression: 109.95 k/131.75 k (16.55%)]

318ti.org does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information or products discussed.