PeachParts Mercedes-Benz Forum - 1993 ce cab top wont budge

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Quote:

Originally Posted by watut (Post 2881446)

I have the rear seat out but don't hear anything when trying to lower the roll bars. I tried reading the codes again from port 9 under the hood. I got a code 8 (Roll bar malfunction indicator lamp (E30)), cleared it and I just get 1 flash now which means there's no codes stored. Now the roll bar light comes on when I first start the car then goes off (normal?) but the damn roll bars still won't go down. The buttons to raise/lower the roll bars are always lit?

When trying to pull codes from port 2 under the passenger floor mat, I don't get any flashes at all, not even 1. The red soft top switch is always lit up but doesn't do anything when pressed.

The button on the dash should be blinking at start up and then go out which is what yours is now doing. You should get one flash when you read pin 2 in the footwell if there are no codes stored

I am sure you have done this but are all of your fuses good? There are fuses for the soft top roll bar in addition to the standard set of fuses. It's possible your roll bar controller is fried but I don't know a way to test it other than swapping in a good one.

You probably have this page from the code book but just in case:
https://lh3.googleusercontent.com/-d...576/image0.jpg

I checked all the fuses, they all seem to be ok.

Heres when I start the car...Is this what the light is supposed to do?

BENZ 001.MOV - YouTube

Here is me running the code off port 9 under the hood.

http://youtu.be/ooa6uTO48-o

Also, the red light for the soft top is always on. Is it only supposed to come on when you unlock the latches and push the roof up?

Quote:

Originally Posted by watut (Post 2882576)

I checked all the fuses, they all seem to be ok.

Heres when I start the car...Is this what the light is supposed to do?

BENZ 001.MOV - YouTube

No that light should blink at startup and then it would not be illuminated until you push it

Quote:

Here is me running the code off port 9 under the hood.

BENZ 002 - YouTube

Also, the red light for the soft top is always on. Is it only supposed to come on when you unlock the latches and push the roof up?

Soft top switch should only be lit as you said, latches unlocked and front of roof pushed up. A lit switch is like a "go" signal. When the top is down it should only be lit when the latches are pulled down.

I read on another forum that you bought this car as a salvage. I'm not sure what kind of condition it was in but there could be some deep hidden wiring issues that have to solved first. I saw the one blink but until you know the wiring and controllers are good I'm not sure the one blink tells you that much. You should have the rear seat and side panels out and be looking for anything that might be amiss. You have made sure the switches/sensors by the axle are present and not tripped?

Quote:

Originally Posted by vexed (Post 2882595)

No that light should blink at startup and then it would not be illuminated until you push it

Soft top switch should only be lit as you said, latches unlocked and front of roof pushed up. A lit switch is like a "go" signal. When the top is down it should only be lit when the latches are pulled down.

I read on another forum that you bought this car as a salvage. I'm not sure what kind of condition it was in but there could be some deep hidden wiring issues that have to solved first. I saw the one blink but until you know the wiring and controllers are good I'm not sure the one blink tells you that much. You should have the rear seat and side panels out and be looking for anything that might be amiss. You have made sure the switches/sensors by the axle are present and not tripped?

The car was hit in the right front corner, one of the rear axle switches had a broken "arm" when I bought it so I replaced that already.

More information - I just talked to the previous owner, they had it at the dealer a few times as the roll bars kept going up on their own, then the roof stopped working...(before the accident). They tried several times to adjust the sensors on the suspension, but it didn't work. He says the pump for the roof works, but it is something with the switches or wiring...

Haven't been able to see anything out of the ordinary but I did notice the horn is not working. Possibly have something to do wit hthe rollbar/soft top not working?

Noticed something weird while playing around with it this morning. If I push the rollbar button on the dash, the CST button will dim. If I push the roll bar button in the back seat the CST light will go off.

Does anyone have a wiring diagram for the rollbar and soft top control modules? According to the previous owner, there was a problem with the system before the accident.

if you do some digging over at benz world in the w124 section I believe there is wiring diagrams.

Quote:

Originally Posted by TheDon (Post 2904842)

if you do some digging over at benz world in the w124 section I believe there is wiring diagrams.

Thanks for your reply. I did print off a whole bunch of wiring diagrams but they all end at the control unit. I need diagrams for inside the control modules.