Thom1

Hi Sharks,

I am no longer stranded. I went back to the car later, and it started right up.

I disconnected the aftermarket alarm. Now the car starts every time. But, the windows and sunroof don’t work at all. Fuses are good. What would suddenly cause these 3 switches to no longer work? The switches are fairly new, and worked fine before my ghosts haunted me again. Could it be the back piece of the IGNITION SWITCH? I have pushed on it and jiggled it. Also, does the back piece just pull straight back to remove?

Some history: The door locks decided to lock only on occasions that pleased them with the remote. Later, when I would turn the key in the ignition, the doors would lock all by themselves. The windows would not work. The sunroof probably would not work then either. (I did not try it then.) Then, the car started after cranking for a long time. (It usually fires right up.) Later, the car had all these symptoms, then it would not fire. This is the behavior of the alarm cutting out the spark. I could let the car sit for a long time, then it would start easily.

Now, I need to get the windows and sunroof working again. Then I look into the alarm or possible power door lock alignment. Any ideas?

See this earlier thread too: https://rennlist.com/forums/showthre...hlight=mystery

Lizard928

how new is your battery, I had issues w/ the doors unlocking themselves then I put in a fresh battery and it fixed the issue.

John Struthers

Ditto on Lizards reply.
You might want to see if, actually, 'where' the after-market alarm was tied into for power. Not sure, but it seems to me that at least the windowsmay have been tied in after the alarm.
As a hedge hook that puppy back up and see if the switches work.
How about the rear wiper?

Thom1

Thanks Lizard,

Any clues about how to solve this problem are welcome.

The car has been really cranking strong. I tried to start it about 10 times when it stranded me. I came back that night, and it fired right up. That doesn’t sound like your battery does it?

Thom1

Thanks John,

The rear wiper works.

Lizard928

I have just gotten a shark but have a 924 that am always doing electrical work on, if you took the power out of the alarm it is possible the PO who installed it did a hack job making it so that the alarm would have to be enabled for those things to work, I would start by using a voltmeter and testing to see if there is power getting to the fuse itself also see if there is power getting to the relay that controls those devices

http://www.928gt.com/928specs/85-86relay.htm

there should have been a card with all this info on it my car came w/ one but it also came w/ all the factory manuals and tool kit compressor

for the windows
this shows fuse #15 as being the fuse for it so pop the fuse out and check to see if there is power getting to either side of the fuse when switch is being held down, also check relay VI for having power at any of the points, or try bridging the point on the relay, I dont have a relay right infront of me to take a pic and it is raining or I would got and pull a relay to show you if you dont know how to read a relay reply saying you dont and if someone else doesn't I will take pics and explain it, but once the relay is bridged try the windows and if they work the problem is either relay, wire/circuit that turns relay on or yes the ignition switch - this applies to the sunroof to but I am not sure what fuse/relay it is but it might even be the same one.

Thom1

Hi Lizard, et.al.:

I reattached the alarm. It had a loose connection. I don’t know if it was loose enough to cause problems. The car starts. The door locks no longer cycle when I turn the ignition key.

The windows and sunroof still do not work. I get no power for either of these at the fuse box anytime, e.g. key off, key on, key on and switch depressed. Number 6 relay gets power when I turn the key on.

Any ideas of what to do next?

Thom1

Now, I have everything installed. I turn the ignition key, and the door locks cycle all by themselves. The windows don’t work. The car starts.

Thom1

Once again, I detached the alarm. The car starts. The door locks do not cycle on their own. The windows do not work.

What do I check now?

SteveCo

Thom;
If the windows and sunroof are not working, then I would think you have to look at relay VI,as it feeds power to both systems. If you have no power (regardless of switch position) on terminals G23 (windows)and G24 (sunroof) in the central electrical panel, then there must be some reason why relay VI is not actuating...could be a bad relay (swap it to test), but more probably the alarm system is messing with something that feeds power to that relay.

Keep in mind that (on my car anyway) the windows and sunnroof operate without even the key in the ignition.

If you have power on the sunroof terminal and not on the window terminal, then the problem is inside the CEP.

Regards,
SteveCo in St. John's

Thom1

I just spoke with Dave Roberts, and ordered an ignition switch rear end electrical piece. He said it is held on by 2 small screws. With small hands, and a mirror, it may be possible to remove it after removing the black plate below the pod. Otherwise, loosen the pod.

Dave said that the switch is probably at least part of the problem. He suspects the alarm too. I am hoping that only the switch is bad. There may be a cascade effect through the alarm that can be corrected with the switch only. I’ll let you know.

Thanks Steve,

Since you are the second guy to mention relay 6 (called window winder), I called Dave back. It is $29, the switch is $39 IIRC. He can’t refund unused electrical parts. But, he thought the relay could be faulty. So, I will get both. It is worth it to have the likely suspects in hand when I dive back in. Will let you know how it goes.

Thom1

Thanks to everyone who has advised on this problem. Diagnosis is a slippery creature!

I replaced RELAY 6, and everything worked properly. I reattached the alarm, and same result. However, the remote did not lock the doors on the first try. Next try, the locks closed properly with the alarm activation. Everything works consistently now. I have not installed the ignition switch electrical piece yet. … will let you know if those ghosts haunt me again.

MTNKING

Hmmm I hope mine is an easy fix also. My sunroof works but my windows wont move at all. I hear a faint noise when i click the passenger side buttons but nothing happens. I don't hear or see anything happening with the drivers side. I opened up the buttons and all of them seemed new. They all had the copper(?) square to plastic buttons on them except for the driverside. It seems like they're made out of coated metal or aluminum. That might be the reason why I don't hear a noise on the driver side. Regardless, the noise might be the mechanism trying to roll the window down but there isnt enough power from the battery. Would it be my battery? or somthing else? I tried everything else, headlights emergency lights, horn, windshield wipers (rear also) they all work.

what's a CEP?

MTNKING

It might be my battery... I am not sure if I trust the battery meter. It starts at 10 and when i tried all the things mentioned above it jumps to 0/empty then goes back to 10 after. Is it supposed to do that?

Mrmerlin

CE = Central electric panel under the floor mat on the passenger side up near the firewall