Blower motor keeps going after car is turned off?
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Member
Joined: Aug 2003
Posts: 171
Likes: 3
From: Downriver Area, Michigan
Car: 89' IROC-Z
Engine: HSR B2L 350ci w/LT4 hotcam and AFR 195's
Transmission: Transgo'd 700R w/Yank 2800
Axle/Gears: 9 Bolt, 3.45
Blower motor keeps going after car is turned off?
Anyone have an idea what would cause this?
I gave my old blower motor to my friend and its still doing it (1992 Firebird V6)
Shop wants $500 to fix it and is claiming some sort of wiring got fried.
I gave my old blower motor to my friend and its still doing it (1992 Firebird V6)
Shop wants $500 to fix it and is claiming some sort of wiring got fried.
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Blower motor keeps going after car is turned off?
Because in Hi speed it gets it power direct from the battery through a relay.
Most likely relay is locked in on position or fan switch is not operating properly
See
http://www.austinthirdgen.org/mkport..._continued.gif
Most likely relay is locked in on position or fan switch is not operating properly
See
http://www.austinthirdgen.org/mkport..._continued.gif
Thread Starter
Member
Joined: Aug 2003
Posts: 171
Likes: 3
From: Downriver Area, Michigan
Car: 89' IROC-Z
Engine: HSR B2L 350ci w/LT4 hotcam and AFR 195's
Transmission: Transgo'd 700R w/Yank 2800
Axle/Gears: 9 Bolt, 3.45
Re: Blower motor keeps going after car is turned off?
Because in Hi speed it gets it power direct from the battery through a relay.
Most likely relay is locked in on position or fan switch is not operating properly
See
http://www.austinthirdgen.org/mkport..._continued.gif
Most likely relay is locked in on position or fan switch is not operating properly
See
http://www.austinthirdgen.org/mkport..._continued.gif
Sorry
Joined: Sep 2005
Posts: 27,819
Likes: 2,406
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Blower motor keeps going after car is turned off?
If you aren't willing to make the effort to understand it, then go pay $500. 
Look up "relay" on Wikipedia or How Stuff Works or something, and learn what it is and what it does.
It's just electricity; gotta be about the simplest part of the car. Everything electric in a car is SO dumbed down that even a moron like me can get it. And if I can figure it out, then every human with an IQ higher than about 50 should have no trouble at all.
In this specific case, there is a relay that is used to feed hard battery to the blower motor in high speed, when the current is the greatest (MUCH lower current on the lower speeds), so that all that wiring and the switch and everything else doesn't have to carry it. If this relay's contacts get stuck, it will produce the symptoms you describe.
To find it, locate the blower motor; find the purple wire; follow it about a foot or so to a plug, with among others, a big fat red wire (the battery feed) in it, that plugs into a small box. That little box is the relay. Get another one at the junkyard, probably shouldn't cost more than $2.
Look up "relay" on Wikipedia or How Stuff Works or something, and learn what it is and what it does.
It's just electricity; gotta be about the simplest part of the car. Everything electric in a car is SO dumbed down that even a moron like me can get it. And if I can figure it out, then every human with an IQ higher than about 50 should have no trouble at all.
In this specific case, there is a relay that is used to feed hard battery to the blower motor in high speed, when the current is the greatest (MUCH lower current on the lower speeds), so that all that wiring and the switch and everything else doesn't have to carry it. If this relay's contacts get stuck, it will produce the symptoms you describe.
To find it, locate the blower motor; find the purple wire; follow it about a foot or so to a plug, with among others, a big fat red wire (the battery feed) in it, that plugs into a small box. That little box is the relay. Get another one at the junkyard, probably shouldn't cost more than $2.
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Blower motor keeps going after car is turned off?
Pic #1 in the post below shows the location of the relay(s) behind the white connector. Follow the wiring as Sofa suggests to locate the correct one (if you have more than one):
https://www.thirdgen.org/forums/susp...e-confuse.html
BTW, most auto parts stores have these in stock, should you desire new.
JamesC
https://www.thirdgen.org/forums/susp...e-confuse.html
BTW, most auto parts stores have these in stock, should you desire new.
JamesC
Last edited by JamesC; Aug 11, 2011 at 07:57 AM.
Thread Starter
Member
Joined: Aug 2003
Posts: 171
Likes: 3
From: Downriver Area, Michigan
Car: 89' IROC-Z
Engine: HSR B2L 350ci w/LT4 hotcam and AFR 195's
Transmission: Transgo'd 700R w/Yank 2800
Axle/Gears: 9 Bolt, 3.45
Re: Blower motor keeps going after car is turned off?
If you aren't willing to make the effort to understand it, then go pay $500.
Look up "relay" on Wikipedia or How Stuff Works or something, and learn what it is and what it does.
It's just electricity; gotta be about the simplest part of the car. Everything electric in a car is SO dumbed down that even a moron like me can get it. And if I can figure it out, then every human with an IQ higher than about 50 should have no trouble at all.
In this specific case, there is a relay that is used to feed hard battery to the blower motor in high speed, when the current is the greatest (MUCH lower current on the lower speeds), so that all that wiring and the switch and everything else doesn't have to carry it. If this relay's contacts get stuck, it will produce the symptoms you describe.
To find it, locate the blower motor; find the purple wire; follow it about a foot or so to a plug, with among others, a big fat red wire (the battery feed) in it, that plugs into a small box. That little box is the relay. Get another one at the junkyard, probably shouldn't cost more than $2.
Look up "relay" on Wikipedia or How Stuff Works or something, and learn what it is and what it does.
It's just electricity; gotta be about the simplest part of the car. Everything electric in a car is SO dumbed down that even a moron like me can get it. And if I can figure it out, then every human with an IQ higher than about 50 should have no trouble at all.
In this specific case, there is a relay that is used to feed hard battery to the blower motor in high speed, when the current is the greatest (MUCH lower current on the lower speeds), so that all that wiring and the switch and everything else doesn't have to carry it. If this relay's contacts get stuck, it will produce the symptoms you describe.
To find it, locate the blower motor; find the purple wire; follow it about a foot or so to a plug, with among others, a big fat red wire (the battery feed) in it, that plugs into a small box. That little box is the relay. Get another one at the junkyard, probably shouldn't cost more than $2.
I don't need to pay $500...I'm posting for a buddy. My cars fine
I will check into the diagram for him
Junior Member
Joined: Mar 2011
Posts: 53
Likes: 0
From: Daytona Beach
Car: 1988 Formula
Engine: L98
Transmission: TH-700-R4
Axle/Gears: BW 9 bolt 2.77
Re: Blower motor keeps going after car is turned off?
I got same issue just unpluged the fan
also my wiper fuse blows even with the wiper motor disconected
also my wiper fuse blows even with the wiper motor disconected
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