Ocelot

This thread is going to be devoted to fixing all the little annoying problems this 15yr old car has. Its an S5 TII for starters, and the following things have been happening:

1) Electric Door Locks: Different functions of the security system decide to go on and off when they please. I'm guessing how its SUPPOSED to work is that unlocking it from the outside makes both locks come up, then when getting out, pushing the button on my side down makes the beep and pushes the other lock down as well, then hold up the door when closing it. Now in my car, when I turn the key outside the door, 3/4 of the time only my side unlocks, and the other 1/4 of the time, the pass. side door unlocks as well. When i'm leaving the car as well, pushing down my side does not get the other side to go down as well, but i'd say once out of every hundred times it decides to lock as well. So where i'm at is every time I enter the car with a passenger, I have to reach across and let them in. Then when leaving they have to lock their own door, and all of the functions seem to work, but they only seem to want to work seperately and not be a fully functional system.

2) Power Window Switch/Motor: The left side motor seems to be a lot stronger than the passenger side, as it always closes first and the pass. side seems to struggle a lot. The switches always worked, but the windows never really went too fast, up until recently. The drivers side window now goes down all the time, but sometimes it doesn't want to come back up. It takes a few tries on the button to get it to finally go, but this just started to happen. I'm afraid one time its going to go down then not come back up, so i've stopped using the switch until I can find the problem.

3) Windshield Wiper Switch: Just VERY recently this problem also started. Basically, the wipers work fine, but once they get going, they decide to stop at random points, and all it takes to get them going again is to switch to a different speed setting. Also sometimes the reason for the freeze is switching the speed setting from a high to a low one.

4) 7.5A "Room" Fuse: Not really a problem, but I was just wondering what electronics go under this fuse.

Are any of these things common problems, and do any of you know some solutions? I'm guessing 2/3 are some bad switches or the wiring needs to be redone, but those seem easier than the whole electrical system on the locks. Anyone have suggestions?

- Brian

den

I've got the same problem with the power windows, the left hand one is very slow to go up. I've got the car of the road this week to try and fix little problems like this, i'm going to attempt to fix the window problem tomorrow. If i manage it i'll let you know. I'm not sure what the 7.5A room fuse does but why not try pulling it and seeing what stops working ?

MrSparkle

room fuse is for illumination in the car such as dome light.

SnowmanSteiner

Mr. Sparkle is correct. If yout window switch is giving you trouble actually working, then I would say take it apart and clean the connections. I did it on my but that wasn't the problem, so if it doesn't fix it then try and find a used one. As far as everything else I don't have power door locks, or any of that crap but check the connections.

- Steiner

Icemark

Probably bad or dirty key switch in the drivers door

Quote:

2) Power Window Switch/Motor: The left side motor seems to be a lot stronger than the passenger side, as it always closes first and the pass. side seems to struggle a lot. The switches always worked, but the windows never really went too fast, up until recently. The drivers side window now goes down all the time, but sometimes it doesn't want to come back up. It takes a few tries on the button to get it to finally go, but this just started to happen. I'm afraid one time its going to go down then not come back up, so i've stopped using the switch until I can find the problem.

Drivers door switch contacts are dirty/full of carbon build up, or the contacts are wasted. I can rebuild the switch for you, or have rebuilt switches for sale on my website. If you want to try and do it yourself, you will need to dis-assemble the entire switch and clean the contacts. Some may need to be replaced and you may need to use a little conductive grease on the contacts to prevent further corrosion and build up.

Quote:

3) Windshield Wiper Switch: Just VERY recently this problem also started. Basically, the wipers work fine, but once they get going, they decide to stop at random points, and all it takes to get them going again is to switch to a different speed setting. Also sometimes the reason for the freeze is switching the speed setting from a high to a low one.

Probably a bad wiper switch. I can also rebuild that or have rebuilt ones already available. Again if you want to try yourself, you will need to remove all the old solder from the board inside the wiper switch and flow all new solder in every contact. I would probably also replace the relay while I was in there, just for added longevity.

Quote:

4) 7.5A "Room" Fuse: Not really a problem, but I was just wondering what electronics go under this fuse.

Cargo room light
Courtesy lights
interior and spot lights
CPU (seat belt buzzer, ignition key reminder, Lights reminder, door and ignition key lights)
ECU (memory)
Idiot lights and clock (memory)
Theft system
audio system
power antenna

SnowmanSteiner

Mark do you buy used switches or window switches?

- Steiner

SnowmanSteiner

whoops

- Steiner

Ocelot

Hmm...i've had it in and out multiple times in the last month or two. Is it just storing the check codes and stuff or more? I knew the clock info kept power on that circuit because it always went back to 1:00, but I didn't know about the ECU memory. Anything to be worried about here?

Icemark

Yep, I sure do.

PM or email me so we don't side track this thread

Icemark

You know; I just don't know. I have only reversed enginneered part of the ECUs.

xfeastonarsex

iTrader: (5)

I am having the same problem with mine, I just tried them out today and they were working what seemed to be ok then I turned them off and they just stopped, didnt put themselves back at the bottom of the windshield.