Hi all, I've read the posts so far on non working wipers and none have been able to help me. I have checked all the fuses etc, the only strange thing is that fuse 15 has 12v on the right side and 0v on the left when the switch is off and intermittent. On first continuous setting it's 10v on left with the fuse removed and 12v on the right. On second (fast) it's about 9v on left and 12v on the right. 

Now I'm guessing something is a miss and have the stalk or CCM in my sights. Any ideas?

Is your bonnet shut properly? There is a switch on the bonnet lock that prevents the wipers working if the bonnet is up.

Thanks for reply, I have tried opening and closing the bonnet. Even tried disconnecting the plug from the catch but with no luck. Not sure if it's an open or closed circuit on the switch. Really stuck now. 

 

Have you checked fuse 41?

 

BTW, bonnet switch appears to be normally open (non-conducting when bonnet is shut).

Edited 12 December, 20187 yr by Wino

Hi Wino, I've checked all the fuses. I will try a link wire in the plug to complete the circuit see if that makes a difference. 

The confusing thing is having a positive voltage both sides of fuse 15 when the stalk is switched on. That's what makes me think of a possible short in the CCM.

Hi all, still trying to sort these wipers out. 

I've managed to get the motor out and check the Voltage to the plugs. The earth continuity is good pin 4 I believe, there is a constant 5v supply at the thin wire pin 3,  and the other two thicker wires have 5v at them depending on the stalk position. This doesn't seem enough as I thought there would be 12v there. There is a clicking under the right hand side of the dash (above the bonnet pull) when the switch is operated. Is there a relay as I thought the CCM controlled it all? 

Any help great fully recieved. 

Relay(s)  are soldered to PCB within the Onboard Supply Control Unit; which is just below the normal relay panel.

Should be 12V outputs to motor, I'm sure.

Box 218 (power to realy/wiper motor) in this diagram comes straight from fuse 41. The wire fourth in from the right is an earth.

 

 

Hi Wino, thanks for the assist. I'll have a look in there next. 

 

Did u ever get to the bottom of this? 

 

I have exactly the same symptoms as mentioned above....

Hi VenjahVrs, 

I had the car in at Skoda dealership in the end. Turned out to be the power control unit. The one under the dash by the bonnet release. Took two weeks for the dealer to get a new one in as in back order. Also made my wallet £564 lighter! That was for diagnosis, parts, programming and labour. 

14 hours ago, Matt-C said:

Hi VenjahVrs, 

I had the car in at Skoda dealership in the end. Turned out to be the power control unit. The one under the dash by the bonnet release. Took two weeks for the dealer to get a new one in as in back order. Also made my wallet £564 lighter! That was for diagnosis, parts, programming and labour. 

 

Hi matt, 

 

Thanks for getting back to me,

 

I was really hoping it wasnt gonna be the CCM but unfortunately i believe it is after the umpteen amounts of testing i did yesterday.

 

Luckily i have VAGCOM so i can do all the programming etc myself. 

 

Thanks again! 

Hi VenjahVRS

It was the power board that failed, or something on it. It worked out by the time I would have spent some money on diagnosis, buying part and getting it coded, the dealer option wasn't to bad. Plus I wasn't sure about putting a second hand unit in. 

Bonus you can do all the coding etc yourself. 

Sorry for the bad new, but good luck. 

This is the relay (actually two in one package) that deals with the wipers.  I'm thinking that replacing the relay has to be the economic fix for these, and am just about to investigate how easy removing one from the circuit board is. There's some on ebay at around £5 each delivered from Poland, so it seems like an attractive idea...

Confirmed as not difficult with the right tools (hot air gun for removal, soldering iron and sucker for hole clearance):

 

 

 

Hi Wino, 

Wished I had this info earlier! Lol

Anyway, hopefully it will help out others in the future. 

Thanks again. 

 

It's possible that the fault isn't the relay, of course, but I'd be very surprised.

Edited 14 February, 20197 yr by Wino

At least the info is on here for future reference for people. 

Great forum, with great advice from people such as yourself Wino. 

Thank you.

Perhaps if @VenjahVrs can be without the use of his car for a few days, he could send me his unit to repair, I have some relays on order from Poland, should be here in a few days. That would be a nice proof of the idea.  Of course he could do the job himself as an alternative.

6 hours ago, VenjahVrs said:

 

Hi matt, 

 

Thanks for getting back to me,

 

I was really hoping it wasnt gonna be the CCM but unfortunately i believe it is after the umpteen amounts of testing i did yesterday.

 

Luckily i have VAGCOM so i can do all the programming etc myself. 

 

Thanks again! 

 

The CCM and this central electrics control module are different units. 

^ Yep; CCM - short for Central Convenience Module, I think, is only dealing with lock and alarm stuff, I think, isn't it @Tech1e?
Looks like this  and is fitted up above the clutch pedal on RHD cars.

 

If you change this one while trying to fix the wipers, you'll definitely fail.

12 minutes ago, Wino said:

^ Yep; CCM - short for Central Convenience Module, I think, is only dealing with lock and alarm stuff, I think, isn't it @Tech1e?
Looks like this  and is fitted up above the clutch pedal on RHD cars.

 

If you change this one while trying to fix the wipers, you'll definitely fail.

 

Spot on mate

Ahhh its the one above the throttle pedal im reffering too! 

 

I have got the names mixed up LOL my bad. 

 

I have a know working unit of a breaker car of mine so i will give it a try, if it works once coded i will send you my broken one @Wino to do as you please with if you like.

Wipers will work regardless of any coding irregularities. 

Morning fellas...

 

 

I have the module out of the car and im trying to trace wires.. 

 

Does anyone have a wiring diagram of the wiring from the indicator stalk to the module? 

 

Im not too savvy with wiring especially when blind. 

 

I have 12v at the fuse but only 5v at the wiper plug. 

 

Any help?

I guess you mean the wiper stalk, not the indicator stalk? There's a diagram up the page a bit ^ but I'm not sure it'll be exactly the right one for your car. When was yours built?