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Rear defrost button stays on by jjd2296
Started on: 08-02-2017 08:14 AM
Replies: 8 (135 views)
Last post by: jjd2296 on 08-03-2017 08:38 AM
jjd2296
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Report this Post08-02-2017 08:14 AM Click Here to See the Profile for jjd2296Send a Private Message to jjd2296Edit/Delete MessageReply w/QuoteDirect Link to This Post
Quick question. I decided to flip the rear defrost button on just to see if it actually worked. When I tried to switch it off it stayed on. Is my switch no good? Am I missing something? It has on and off on the button.
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fierofool
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Report this Post08-02-2017 08:40 AM Click Here to See the Profile for fierofoolClick Here to visit fierofool's HomePageClick Here to Email fierofoolSend a Private Message to fierofoolEdit/Delete MessageReply w/QuoteDirect Link to This Post
It's been a while since I've had one with a defroster, but I believe it will time out if you don't press it again.
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jjd2296
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Report this Post08-02-2017 09:15 AM Click Here to See the Profile for jjd2296Send a Private Message to jjd2296Edit/Delete MessageReply w/QuoteDirect Link to This Post
Then why does it have and off function on the button. I depress it down and nothing happens???
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fierofool
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Report this Post08-02-2017 10:25 AM Click Here to See the Profile for fierofoolClick Here to visit fierofool's HomePageClick Here to Email fierofoolSend a Private Message to fierofoolEdit/Delete MessageReply w/QuoteDirect Link to This Post
I don't know. Like I said, it's been a while. Could be your switch is bad. If you turn off the ignition then back on, does the defogger turn off? There's a defogger timer relay in the system, it could be sticking.
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theogre
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Report this Post08-02-2017 01:55 PM Click Here to See the Profile for theogreClick Here to visit theogre's HomePageSend a Private Message to theogreEdit/Delete MessageReply w/QuoteDirect Link to This Post
Switch running timer.
Timer is near brake and gas pedals.
One of them is bad/dirty.

Lighted Dash Switches doesn't come apart to clean easy like Fiero PW because of bulbs.
Timer is in a metal can.

Defog "relay" should shut off after 10 or 5 minutes first time, 5 or 2.5 minutes after, each time the engine runs. If does then timer is likely good.

GM used short Timer values for Fiero and never bothered to update SM. (Other car lines have 10/5 minutes) 22p is 10026005 and is 5/2.5 minutes.
Timer numbers are on the case.

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jjd2296
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Report this Post08-02-2017 03:19 PM Click Here to See the Profile for jjd2296Send a Private Message to jjd2296Edit/Delete MessageReply w/QuoteDirect Link to This Post
ok but this doesn't answer my question, does the timer effect whether the off function on the button works?
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Raydar
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Report this Post08-02-2017 06:16 PM Click Here to See the Profile for RaydarClick Here to Email RaydarSend a Private Message to RaydarEdit/Delete MessageReply w/QuoteDirect Link to This Post
Pretty sure you should be able to manually shut it off.
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rbell2915
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Report this Post08-02-2017 11:33 PM Click Here to See the Profile for rbell2915Click Here to Email rbell2915Send a Private Message to rbell2915Edit/Delete MessageReply w/QuoteDirect Link to This Post
Agreed, you should be able to manually switch off the defroster by pressing the button.
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jjd2296
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Report this Post08-03-2017 08:38 AM Click Here to See the Profile for jjd2296Send a Private Message to jjd2296Edit/Delete MessageReply w/QuoteDirect Link to This Post
that my exact point, I am pressing the off button but the light stays on and the heat is still coming from the window. I had to shut the car off to reset it.
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