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Radiator Fan constantly on even when the car is off


daonlyillwiz
Newbie


Galant VR-4 org Post #: 1240169 posted 10/26/17 03:10 PM     Remind Me!  Send Private Message   Edit Post      
I'm new to the Galant / Pre 95 Mitsu world...i've always had 2g DSMs so some of this wiring is foreign to me. just recently i had this weird issue where my fan will not shut off even when i turn the car off and pull the key...I replaced the sensor in the radiator with a known good one. Why would this happen?

I wonder if its because I don't have this sensor in my new thermostat housing:



This according to what I learned is a fail safe switch. It will switch on BOTH fans when it reaches its set temp. If this is the reason why how can I get around this because its a pain in the ass to keep having to pull the fuse and put it in when I turn off and turn on the car lol. I dont think this is the reason because this shouldn't affect the fans with the car off.

Also I removed the relays for the Radiator fan and the fan still runs...A friend of mine said that the rad fan runs off a switched ground.


Edited by daonlyillwiz (10/26/17 03:16 PM)

Posts: 6 | From: New York, NY | Member Since: 05/16/17 | IP: (108.27.67.202) | Report this post to a Moderator

Nebraska
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1099/2000


Galant VR-4 org Post #: 1240176 posted 10/26/17 05:53 PM     Remind Me!  Send Private Message   Edit Post      
Hi there, welcome to the community.

click

I found these electrical manuals to be very helpful when troubleshooting. I can even take a look since I work in electrical controls.

So, your primary fan is always running no matter what? Have you touched any wiring at all? I see you have a new tstat housing. Besides that sensor, is everything hooked up? I ask because I was playing with some wires by my tstat and one literally broke off because it was rock hard. Is your AC fan running or just primary?



1099/2000 Summit white
"Do it once, Do it right."

Posts: 90 | From: Lincoln, NE | Member Since: 04/09/15 | IP: (152.51.56.152) | Report this post to a Moderator

kumfasa
Member


Galant VR-4 org Post #: 1240181 posted 10/26/17 07:17 PM     Remind Me!  Send Private Message   Edit Post      
It will be the fan relay which has stuck closed. Find it and test it.



Even the wool your trying to pull over my eyes is 95% polyester.

Posts: 115 | From: Tauranga, New Zealand | Member Since: 02/28/15 | IP: (58.28.212.87) | Report this post to a Moderator

Nebraska
Junior Member
1099/2000


Galant VR-4 org Post #: 1240183 posted 10/26/17 08:31 PM     Remind Me!  Send Private Message   Edit Post      
Put a meter across the normally open contacts. If there is continuity^^^^ Mr. Fasa hit it on the head.



1099/2000 Summit white
"Do it once, Do it right."

Posts: 90 | From: Lincoln, NE | Member Since: 04/09/15 | IP: (152.51.56.152) | Report this post to a Moderator

daonlyillwiz
Newbie


Galant VR-4 org Post #: 1240194 posted 10/27/17 10:16 AM     Remind Me!  Send Private Message   Edit Post      
Thanks for the input fellas, im going to give this a shot today when i get home.

Posts: 6 | From: New York, NY | Member Since: 05/16/17 | IP: (108.27.67.202) | Report this post to a Moderator

MuffinMan7580
Member
570/1000


Galant VR-4 org Post #: 1240340 posted 11/04/17 11:52 AM     Remind Me!  Send Private Message   Edit Post   
#4 in the diagram switches the fans to high-speed. If the controlling wire touches ground, it will activate the relay and fans(I think it's Black/Blue). Also, the fans get switched on via ground on GVR-4's, so power is always there. If you rewired new fans into the car, double check your wiring using this page as a guide.


Edited by MuffinMan7580 (11/04/17 11:57 AM)

Posts: 142 | From: Fort Bragg, NC | Member Since: 08/06/11 | IP: (2600:6c51:6580:2) | Report this post to a Moderator


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