98 Cabriolet top won't open or close (Full Version)

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98 Cabriolet top won't open or close

  

whaleymd -> 98 Cabriolet top won't open or close (6/6/2007 4:42:25 PM)

I'm new to the forums. Like what I see so far. Maybe someone has a suggestion.

I bought a 98 cabriolet about a month ago. 104K miles. At first, the top worked fine. Then, it started acting up, and I had to unlock and relock the trunk several times each time I wanted to open or close the top. Once I got it to work, it worked flawlessly until the next time I unlocked to the trunk. Now, I can't get it to operate at all. When I hit the button to open the top, the back of the top will lift as normal, and the toneau will lift about 3 inches and freeze. No further movement. Also, if I open the top manually, and try to close it, the toneau will lift about 3 inches and stop, but you can still hear the motor churning.

Any suggestions? After dealing with this and several other small issues, I'm starting to regret buying this car over a '98 325i.

  
hubturn -> RE: 98 Cabriolet top won't open or close (6/7/2007 7:00:48 AM)

If  you search the forum you will find many similar probles for the convertible top.  Typically, the wires to the truck break at the flexing points. Remove the liner on the trunk lid to find them.  They may be cracked internally and not be totally obvious.  There are some pictures on other sites of how to split the bundle and use a meter to test the wires. It is not difficult.  Do not be dismayed.  Your problem sounds intermittant and that usually means wiring.   When the system discovers a failure the top indicator light will blink.  I'd be interested to know if it starts blinking right after the back of the top raises.  That's when a signal is sent to lock the trunk.

whaleymd -> RE: 98 Cabriolet top won't open or close (6/7/2007 7:20:19 AM)

The top indicator light flashes when I release the top latch (obviously) and put the top down. It will continue to flash as long as the car remains started. This includes driving, parked, anything. If I turn off the car, pull the key from the ignition and restart the car, the light will go out as it should normally.

As you said, I do not see any obvious signs of frayed, split, or broken wiring, but I will look in the forums on how to test. I can see that the hydraulic fluid in the motor is not full. Because from time to time the toneau will lift just a little higher if hold the top button, then release, then hold again, I though maybe this could be a problem, but I am like you in that this seems more like an electrical thing. Thanks.

hubturn -> RE: 98 Cabriolet top won't open or close (6/7/2007 4:36:22 PM)

This is straight from The New Audi Cabriolet, service training  booklet, self study program 221.

A Convertibel Top Indicator Light - K98- in the instrument cluster signals the following:
Steady Light
- During opening and closing operation
- If an opening or closing operation is interrupted by releasing the Convertible Top Switch
Flashing Light
- If faulty input signals or illogical switch signals are received by the Convertible Top Control Module.
- If a DTC is stored in the Convertible Top Control Module. 

As you can see, your light is telling you something is wrong or you have a stored code.  I have attached a picture of my backup pump.  The min and max lines on the reservoir are on a slant as the pump sits on a slant in the car.  The picture shows the pump on it's side for clarity.  The reservoir is never totally full, and the fluid lines up with the lines.  The 13mm bolt in line with my finger is the fill point.  I doubt you need fluid unless you have a leak.  The fluid is the same as the power steering fluid.  Use a mirror and look at it then decide about the fluid issue.  I'm still voting on wiring as your pump works.  Maybe you have a bad solenoid valve, but the intermittant nature of the problem points the finger at bad wiring. Go to SJMAutotechnik.com and buy the manual I quoted.  Best $15 I have spent. 

hubturn -> RE: 98 Cabriolet top won't open or close (6/7/2007 4:39:53 PM)

The attachment did not load as planned.  Save it to your desktop and then open it to see the whole thing.
Sorry!

whaleymd -> RE: 98 Cabriolet top won't open or close (6/7/2007 5:02:36 PM)

I have been searching the forums looking for how to test the wiring with a meter. I've seen too many similar wiring problems on the forums to not look into it. I will check out the website as well. Thanks.

whaleymd -> RE: 98 Cabriolet top won't open or close (6/8/2007 11:43:33 AM)

Alright. I found the broken wires, on both sides. I spliced back together, and still have the same problem. The toneau won't lift after the roof is in place.

rundmsef -> RE: 98 Cabriolet top won't open or close (7/15/2007 7:14:13 AM)

  Did you ever find a resolution to your problem?  I believe I am having the same issue.  Is it posible to manually retract the top until I find a solution?

whaleymd -> RE: 98 Cabriolet top won't open or close (7/17/2007 4:28:14 PM)

I have not yet found the problem, although I have eliminated several possibilities. You can manually raise and lower the top in the meantime. The most likely culprit is a broken wiring harness, of which I had two.

whaleymd -> RE: 98 Cabriolet top won't open or close (7/31/2007 3:11:23 PM)

OK,

So a month after I began my journey, I find myself back at the beginning. I had previously found not one, but two broken wiring harnesses at the trunk. After splicing some wires back together, no solution. Here I am a month later, and I have finally gotten the problem diagnosed as........wiring harness losing power. Apparantly, even with the wires spliced, there is another short or break somewhere that I can't find. My question is, Instead of giving up my first born to buy new harnesses from a dealer, is there somewhere online that I can buy these, or how hard is it to make up my own wiring harnasses to replace? Any help would be appreciated.

pedromcc -> RE: 98 Cabriolet top won't open or close (9/22/2007 2:44:15 PM)

Hi Whaley, guys. New to the forum but not to Audis. I am however in my first Cab. It's a 99 and I have exactly the same problem that you describe here. Have you made any headway with it yet? I;m fine with having to open and close manually for the time being, but want to get the d#%$ thing working.

rmac.cab -> RE: 98 Cabriolet top won't open or close (10/16/2007 11:35:06 PM)

95 Cabriolet ...

I initially had this problem 4 yrs ago and it was broken wires on drivers side trunk hinge where the wires flex. That corrected it worked for 4 yrs and recently stopped working again. This time it was the same wires but on the other side.

The wires are contained in a outer casing which will look fine, but if you carefully cut the casing at the bend point, it is very likely that there are many broken wires inside (~8 wires either side).

I crimped the wires on the first side 4 yrs ago and soldered the wire on the 2nd side this weekend and it is working again.

In my opinion the wires at the trunk hinges on both sides are probably the cause of most top problems. Hydraulic systems tend to be very reliable.

NYankee -> RE: 98 Cabriolet top won't open or close (11/12/2007 4:43:42 PM)

I had the exact same, exact circumstances with my '97 Cab. top.  It was indeed the wires at the back at the pinch point.  I replaced the ones that looked broken, no dice, so I respliced and re-engineerd the placement of ALL of them and it works like a charm now!!!

sometimes wires can be broken on the inside any you can not tell just by looking at it, I would suggest doing all of them.



jimzigg -> RE: 98 Cabriolet top won't open or close (3/3/2008 9:27:30 PM)

can somone assist with instruction on how to work a manual top?  i dont have power option or switch in mine.

iambigmun -> RE: 98 Cabriolet top won't open or close (3/18/2008 1:10:10 PM)

I am really new to this forum and not sure how to post a link but I just posted instructions on lowering and raising the top manually. I started my post with "1995 Audi Cabriolet", so search that with "top" and "power" and you should find my instructions.
I responded to vmancuso

Oh I think this will work...
http://www.audiforums.com/m_833144/tm.htm

  

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