Does anyone know electronics?

Mike 88GT · 04-04-2001, 12:11 PM

I'm having trouble with my power windows in my 88'GT drop top. They seem to cut out durning going up or down. I think it has something to do with a "circuit board"? Does anyone know what it could be and how I can fix it? And where I could get the parts to do it. Thanks ahead of time for your help.

elmir50 · 04-05-2001, 11:39 PM

Pull off the door panel on the side with the problem. Get a schematic for the window circuit. I know the haynes manuals have them. Check all connections. I think it is probaly the motor. The brushes on it may be worn. Anyways, what circuit board are you talking about? Basic parts of the circuit are switch, regulator, and motor. Try tapping the area around the motor when putting the window up and down. Just do a little troubleshooting.

Mike 88GT · 04-06-2001, 09:24 AM

elmir50,
I know where your going with this, but should I do that to all four winsows? You see, it doesn't matter which window I role up or down, it will still lose power and then none of the windows will work, not just the one I'm rolling. They all lose power to a short time, then all come back on at the same time. Is there some kind of main power source that feeds all the window motors that could be giving me my problem? This is so frusturating!

Hammer · 04-06-2001, 10:11 AM

Did you get the wiring schematic yet?

Mike 88GT · 04-06-2001, 10:54 AM

Hammer,
Not yet, still working on it. My car is still in storage, so I am just getting all the info I can before I take it out. The snow is almost gone here and I'm waiting for it to rain really good, twice.

Mike

Mike 88GT · 04-10-2001, 04:01 PM

I got the haynes manual for 79'to 93'. But when I look in the back for wiring diagrams, theres nothing for the power windows. In fact, it looks like the wiring diagrams only go up to 87'. Now where do I look?

Rev · 04-10-2001, 04:12 PM

Does that car have a power window "Lock-out"? My Toyota FourRunner does have one that malfuctioned producing similar problems. Sometimes the power windows to all but the driver window just wouldn't work. It was a bad lock-out switch.

Rev

------------------
'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.

Mike 88GT · 04-10-2001, 04:48 PM

Rev,
Yeah, I do have a power window lock out button. But would that cause all the windows to cut out, and after waiting for awhile, they come back on. It seems when I mess with the windows in trying to role them up or down they always cut out. All of them do, doesn't matter which window I'm playing with, they all are gone. Would the lock out button do that?

04-10-2001, 05:54 PM

It could be the lock out switch. When switches and relays get old and lose efficiency, the resistance goes up. This causes problems in the circuitry. I had a tank selector switch (on 90 F-350 front to rear) go bad and it made the rear tank fuel pump stop working and only gave partial current to the front tank.

I thought the fuel pumps went bad, but I pulled the old one out and tested it and it worked. So I went through all of the switches and relays in the circuit and I jumped the tank selector switch and that was it.

Mike 88GT · 04-11-2001, 08:50 AM

88GT5.013.02,
I'm following you on the lock out switch and it sounds like a winner. Its been raining out here so I haven't had a chance to do any testing on the car. One question though, when I lose power to all the windows, I also have no power to the power locks. They all seem to come back on at the same time. Does that sound normal?

04-11-2001, 03:02 PM

Yeah wierd things happen with electronics. It could pull enough amps to stop everything without blowing the fuse. Wierd stuff happens.

04-04-2001, 12:11 PM	#1
Mike 88GT Registered Member Join Date: Mar 2001 Location: Hutchinson, MN Posts: 36	Does anyone know electronics? I'm having trouble with my power windows in my 88'GT drop top. They seem to cut out durning going up or down. I think it has something to do with a "circuit board"? Does anyone know what it could be and how I can fix it? And where I could get the parts to do it. Thanks ahead of time for your help.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
electronics problem: please help!	nighthawk355x	Windsor Power	4	05-14-2004 03:06 AM
Question about MAF electronics.	5ohCOUPE	Windsor Power	0	04-29-2003 08:10 AM
Retrofitting SN94,95 to 93 Electronics? Who's done it?	gtsr515	Windsor Power	1	06-13-2002 06:16 AM
Help with C&L 76MM & A9L computer install	venumus93	Windsor Power	19	05-16-2002 07:58 PM
relay problem between battery and electronics	0h n0 5.0	Windsor Power	1	04-09-2002 10:38 PM

04-05-2001, 11:39 PM	#2
elmir50 Registered Member Join Date: Mar 1999 Location: Tsawwassen BC Canada Posts: 413	Pull off the door panel on the side with the problem. Get a schematic for the window circuit. I know the haynes manuals have them. Check all connections. I think it is probaly the motor. The brushes on it may be worn. Anyways, what circuit board are you talking about? Basic parts of the circuit are switch, regulator, and motor. Try tapping the area around the motor when putting the window up and down. Just do a little troubleshooting.

04-06-2001, 09:24 AM	#3
Mike 88GT Registered Member Join Date: Mar 2001 Location: Hutchinson, MN Posts: 36	elmir50, I know where your going with this, but should I do that to all four winsows? You see, it doesn't matter which window I role up or down, it will still lose power and then none of the windows will work, not just the one I'm rolling. They all lose power to a short time, then all come back on at the same time. Is there some kind of main power source that feeds all the window motors that could be giving me my problem? This is so frusturating!

04-06-2001, 10:11 AM	#4
Hammer AKA "Dr. Evil" Join Date: Feb 1999 Location: South Fork Ranch Posts: 1,721	Did you get the wiring schematic yet?

04-06-2001, 10:54 AM	#5
Mike 88GT Registered Member Join Date: Mar 2001 Location: Hutchinson, MN Posts: 36	Hammer, Not yet, still working on it. My car is still in storage, so I am just getting all the info I can before I take it out. The snow is almost gone here and I'm waiting for it to rain really good, twice. Mike

04-10-2001, 04:01 PM	#6
Mike 88GT Registered Member Join Date: Mar 2001 Location: Hutchinson, MN Posts: 36	I got the haynes manual for 79'to 93'. But when I look in the back for wiring diagrams, theres nothing for the power windows. In fact, it looks like the wiring diagrams only go up to 87'. Now where do I look?

04-10-2001, 04:12 PM	#7
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Does that car have a power window "Lock-out"? My Toyota FourRunner does have one that malfuctioned producing similar problems. Sometimes the power windows to all but the driver window just wouldn't work. It was a bad lock-out switch. Rev ------------------ '66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph 1/4 mi.

04-10-2001, 04:48 PM	#8
Mike 88GT Registered Member Join Date: Mar 2001 Location: Hutchinson, MN Posts: 36	Rev, Yeah, I do have a power window lock out button. But would that cause all the windows to cut out, and after waiting for awhile, they come back on. It seems when I mess with the windows in trying to role them up or down they always cut out. All of them do, doesn't matter which window I'm playing with, they all are gone. Would the lock out button do that?

04-10-2001, 05:54 PM	#9
88GT5.013.02 Guest Posts: n/a	It could be the lock out switch. When switches and relays get old and lose efficiency, the resistance goes up. This causes problems in the circuitry. I had a tank selector switch (on 90 F-350 front to rear) go bad and it made the rear tank fuel pump stop working and only gave partial current to the front tank. I thought the fuel pumps went bad, but I pulled the old one out and tested it and it worked. So I went through all of the switches and relays in the circuit and I jumped the tank selector switch and that was it.

04-11-2001, 08:50 AM	#10
Mike 88GT Registered Member Join Date: Mar 2001 Location: Hutchinson, MN Posts: 36	88GT5.013.02, I'm following you on the lock out switch and it sounds like a winner. Its been raining out here so I haven't had a chance to do any testing on the car. One question though, when I lose power to all the windows, I also have no power to the power locks. They all seem to come back on at the same time. Does that sound normal?

04-11-2001, 03:02 PM	#11
88GT5.013.02 Guest Posts: n/a	Yeah wierd things happen with electronics. It could pull enough amps to stop everything without blowing the fuse. Wierd stuff happens.