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Explanation for Fuse-Relay box configuration

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I know that there are different types of Felicia so different fuse boxes but please take a look at mine.

The R6 and the INT are missing.

 

d2BD9za.jpg

 

While searching on the internet i have seen many variations but almost none same a mine.

Here are some examples:

 

Fuse-Relay boxes

 

 

Shema-bloka-1.jpg

 

 

R1 - High beam relay

R2 - Front fog lamp relay

R3 - Rear fog lamp relay

R4 - Heated rear window relay

R5 - Relay for injection system Bosch Mono-Motronic

R6 - Relay for blocking the ignition system (when the door is open – only on some models) AKIN, SPDP

R7 - Ignition switch unload relay (X-relay)

R8 - Alarm relay

INT - Rear wiper and washer relay

W-W Front wiper relay

 

My questions are:

 

1) Is there a possibility for a relay to affects the Cold Start only?

2) Is there a possibility for a loose or corrosioned pin on the plug above the relay to affects the Cold Start only?

3) If i install an INT relay the rear wiper will work as the front with a delay?

4) What's the role of R7 relay? What ''ignition unload" practically means? No R7 no ignition?

  • Author

I just came from the repair-shop, i went because many times while turning the key to the first scale the noise from the relay on fuse box was weird, often i was hearing a continuing ''squeaking'' instead of the normal ''clack''

The electrician found the R7 - Ignition switch unload relay (X-relay) which is the grey with number 18 on (above photo) damaged on the right side (like someone with screwdriver tried to remove it), very hot (he said that wasn't normal) and one of the pins with significant corrosion.

 

Ii4jY0Y.jpg

 

 

 

MZCCtYP.jpg

 

 

Was the factory one and i wonder does this corrosion can affect the Cold Start? Any other function of the car could be even slightly affected?

 

 

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X relay switches off various current/power consumers that might be switched on during starter motor operation, to maximise energy availability for the starter.

On 24/10/2022 at 10:54, D.FYLAKTOS said:

1) Is there a possibility for a relay to affects the Cold Start only?

2) Is there a possibility for a loose or corrosioned pin on the plug above the relay to affects the Cold Start only?

3) If i install an INT relay the rear wiper will work as the front with a delay?

4) What's the role of R7 relay? What ''ignition unload" practically means? No R7 no ignition?

1/2) no, the only relay that has anything to do with the engine management is ECU is the fuel pump relay.

3) not exactly. It wipers the rear window in set interval (~5s), if you shortly activate rear washer. 

4) unload disconnects electrical equipment that consumes large current, to leave more battery's capacity to the starter motor - namely heater fan and headlights, I'm not sure about others

  • Author
3 minutes ago, Papez said:

1/2) no, the only relay that has anything to do with the engine management is ECU is the fuel pump relay.

3) not exactly. It wipers the rear window in set interval (~5s), if you shortly activate rear washer. 

4) unload disconnects electrical equipment that consumes large current, to leave more battery's capacity to the starter motor - namely heater fan and headlights, I'm not sure about others

 

1) That corrosion on the pin can affect the relay to work perfect 100% in all his tasks?

2) Pushing forward the lever the only thing that happens is water from the small injector to the rear window and only one move (left to right) of the wiper.

The delay function of the 2 front wipers pushing the lever upward does not exist and i thought that if i could find a relay that matches then i would have the same function in the rear wiper too.

16 minutes ago, D.FYLAKTOS said:

 

1) That corrosion on the pin can affect the relay to work perfect 100% in all his tasks?

2) Pushing forward the lever the only thing that happens is water from the small injector to the rear window and only one move (left to right) of the wiper.

The delay function of the 2 front wipers pushing the lever upward does not exist and i thought that if i could find a relay that matches then i would have the same function in the rear wiper too.

1) ofcour, bad contact would cause it overheat or not switch properly. But it is not necessary for the engine management, quite opposite, its function is to disconnect (almost) everything except the engine.

2) it's similar, but the interval is preset and cannot be changed. One push activates it and other disactivates, but they are not very common, there's no indication and only one I've seen in person didn't work well and I had to remove it.

  • Author
3 minutes ago, Papez said:

1) ofcour, bad contact would cause it overheat or not switch properly. But it is not necessary for the engine management, quite opposite, its function is to disconnect (almost) everything except the engine.

2) it's similar, but the interval is preset and cannot be changed. One push activates it and other disactivates, but they are not very common, there's no indication and only one I've seen in person didn't work well and I had to remove it.

 

1) Just as ''for good maintenance" i ordered a genuine and the seller said Monday morning will be available

2) I thought that if i could find and install a INT relay i would make the rear to work as the 2 fronts (with delay) because in light rain situations i am Ok in front but each time i want to see the back i had to press instantly the lever so the rear wiper work only one time

I wonder why Skoda didn't make all 3 wipers to work the same way.

 

22 hours ago, D.FYLAKTOS said:

As for the INT relay no good news, maybe the wired is missing.

 

It's relay with built-in electronic circuit, different than front wiper relay.

I found it under PN 6U0955529 - not sure if it's correct.

  • Author
2 hours ago, Papez said:

 

It's relay with built-in electronic circuit, different than front wiper relay.

I found it under PN 6U0955529 - not sure if it's correct.

 

Control unit for wiper/washing system - Rear window Skoda Felicia 6U0955529

Here in a local market store is expensive but i will search in other store or in foreign shops.

So it's a ''click and go'' and the rear wiper will work if i want with delay as the two fronts? No need for something else?

  • Author

Update:

 

https://www.ecstuning.com/b-genuine-volkswagen-audi-parts/multipurpose-relay-priced-each/4h0951253/

 

Product Details

The relays in your vehicle control the on/off function of many electronic components. When activated the interior contacts come together and allow electricity to pass through to the component in connection. Be sure to check for proper application to ensure the right fitment.

 

Previous Revisions

7M0951253A

8E0951253

191937503

443951253J

8D0951253

 

Cross Reference

191937503

7M0951253A

8D0951253

 

Made in Portugal (as the factory)

4H0951253

V23136-J0006-X079

SN7

PA66-GF25

 

s-l500.jpg

 

With the ''temporary replacment" GM relay i had no lights and wipers although i could start-drive the car normally.

On 30/10/2022 at 22:08, D.FYLAKTOS said:

Fot INT gives the 6U0 955 532A which has different pin layout and beneath the 6U0955529 without mention the INT.

 

The one in the link is 532G. The index can mean anything from a minor modification to a totally different part.

 

"With the ''temporary replacment" GM relay i had no lights and wipers although i could start-drive the car normally."

 

That just confirm what I said before - no part of engine management is connected to the X-relay

 

Edit: found the rear wiper relay right from the OEM manufacturer: AEV 2015

https://eshop.aev.cz/aev-2015

 

 

 

Edited by Papez

  • Author
1 hour ago, Papez said:

Edit: found the rear wiper relay right from the OEM manufacturer: AEV 2015

https://eshop.aev.cz/aev-2015

 

 

Thank you, it's a mess, 6U0955532A 6U0955532D 6U0955532H 6U0955532G etc

I bought this relay too (together with the (4H0951253) few hours ago.

 

o83azZW.jpg

 

 

If it fit's and if it works i will found out in few hours when i install it in the car. 🙏

 

  • Author
On 27/10/2022 at 11:57, Breezy_Pete said:

X relay switches off various current/power consumers that might be switched on during starter motor operation, to maximise energy availability for the starter.

 

On 01/11/2022 at 11:28, Papez said:

hat just confirm what I said before - no part of engine management is connected to the X-relay

 

Yes Gentlemen, the R7 relay (mine now is 4H0951253) had nothing to do with engine start (fuel pymp for example) because with this relay missing the car starts-revs-travel without problem, except that you don't have lights (you have high beam signal)-wipers.

 

After all hese years with problem in heavy rainy days now the problem with tthe INT rear wiper solved for 15 euros.

The 6U0955529 AEV 2015 relay works ''plug and play" and no need for something else, keep in mind that it's height in bigger that the other relays so it may need to stand aside some cables which are beneath the passengers storage compartment.

  • 1 year later...
On 1/11/2022 at 7:39, D.FYLAKTOS said:

 

Gracias, es un desastre, 6U0955532A 6U0955532D 6U0955532H 6U0955532G etc.

También compré este relé (junto con el (4H0951253) hace unas horas.

 

o83azZW.jpg

 

 

Si encaja y funciona, lo descubriré en unas horas cuando lo instale en el coche. 🙏

 

I cannot understand how an element that, by passing energy through a coil that generates a magnetic field and then closes a separate circuit, is different from others that perform exactly the same function, even retaining their corresponding contacts or connectors.
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Some of these things that look like just relays contain circuit boards which make them 'control units' rather than just simple relays.

 

Usually the outer cover can be unclipped to reveal these extra components. 

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