Hi everyone,

 

I have a seemingly strange problem. I bought a s/h mk2 07 plate fabia that has at some point in it's life had a front end o/s bump. The bonnet, wing and bumper were re-sprayed and the headlamp replaced. I don't know who did the work but had a mate check it out that it was safe. Anyway, i digress...

 

The problem is that the main beam doesn't work. Dipped beam works fine but no main beam at all. No light on the dash, nothing. When I bought the car it had (bizarrely) two different headlight types installed. The o/s had a reflector type headlamp (H4 lamp) and the n/s had the projector type headlamp (H7 bulb). I was informed that this was probably the issue (as I understand the ECU has a load sensing feature) so I switched the o/s unit (the side that had the bump) to a projector style unit. So now both headlights are projector style headlights with H7 bulbs. Still no mainbeam though.

 

As a side note, if I unplug the molex connector at the back of either headlight then turn the headlights on, I get mainbeam on the remaining headlight and the blue headlight light on the dash. This seems to suggest that it is a current delivery problem. Is there a relay or anything else in the chain I could look for? I had hoped that a friend of a friend at the skoda main dealer has never heard of the problem and so can't help.

 

So here I am! Any help/advice would be much appreciated.

 

Thanks, Ciaron

Pretty sure there will be a relay. Somewhere.

But what spec is the car? What headlights should it have?

The car is a 1.4 TDI 2. It is seemingly impossible to find out what headlights it should have. Through my crude google image searches I have only found one car like mine that DOESN'T have the projector type headlight so I'm guessing they're the correct ones. But only guessing!

 

It looks like there are 5 relays in the holder but without a schematic or diagram I haven't got a chance! I've found a schematic and workshop manual for a Mk1 Fabia but not a Mk2.

The car is a 1.4 TDI 2. It is seemingly impossible to find out what headlights it should have. Through my crude google image searches I have only found one car like mine that DOESN'T have the projector type headlight so I'm guessing they're the correct ones. But only guessing!

It looks like there are 5 relays in the holder but without a schematic or diagram I haven't got a chance! I've found a schematic and workshop manual for a Mk1 Fabia but not a Mk2.

The 2 is the same as the later SE models.

S (or 1) has the reflector lenses with h4 bulbs, upwards from that SE (2) or elegance (3) should have the projector lights.

But has the loom been butchered to fit reflectors?

The prefacelift projectors use a h7 bulb and a shutter to operate dip and high beam. The h4 (3 wires into the plug) is a dual filament bulb which does both low and high beam.

Other than that. I dno how much more i can help. Im not a tech myself.

You can download wiring diagrams for your car (and a whole lot more) legitimately via erWin, for a mere 7Euro +VAT for an hour's access. The exchange rate at the moment makes that about £6 total which is a hell of a bargain IMHO.

 

Edit: You can also download the full 'Car Data' for your VIN, which the service book - and boot floor - stickers are a mere teeny subset of.  This would tell you which type of lights your car was built with, I'm pretty sure.

You can download wiring diagrams for your car (and a whole lot more) legitimately via erWin, for a mere 7Euro +VAT for an hour's access. The exchange rate at the moment makes that about £6 total which is a hell of a bargain IMHO.

Edit: You can also download the full 'Car Data' for your VIN, which the service book - and boot floor - stickers are a mere teeny subset of. This would tell you which type of lights your car was built with, I'm pretty sure.

£6 an hour?

I sense some screenshotting coming on...

You don't need to screenshot, you can download.

 

Of course, it's copyrighted info, but I can't really see why anyone with a genuine use wouldn't spend their own £6* for their own copy.

 

*£5.87 today.

The 2 is the same as the later SE models.

S (or 1) has the reflector lenses with h4 bulbs, upwards from that SE (2) or elegance (3) should have the projector lights.

But has the loom been butchered to fit reflectors?

The prefacelift projectors use a h7 bulb and a shutter to operate dip and high beam. The h4 (3 wires into the plug) is a dual filament bulb which does both low and high beam.

Other than that. I dno how much more i can help. Im not a tech myself.

 

Thanks for the info fabiamk2se. There's no physical evidence of the loom having been butchered. The plug on the wiring harness fits both types of headlamp assembly so unless something has been done further up the line?

 

You can download wiring diagrams for your car (and a whole lot more) legitimately via erWin, for a mere 7Euro +VAT for an hour's access. The exchange rate at the moment makes that about £6 total which is a hell of a bargain IMHO.

 

Edit: You can also download the full 'Car Data' for your VIN, which the service book - and boot floor - stickers are a mere teeny subset of.  This would tell you which type of lights your car was built with, I'm pretty sure.

 

Massive thanks for this Wino! Just had a look on here and it looks like all the info I am missing is on here. And at €7/hour inc. printing rights I can just grab the bits I need and make them into a .pdf! No screenshots required!

a h7 has 2 prongs on the bulb and the h4 has 3

A h4 plug will fit onto a h7

Maybe its the wrong loom?

Thanks for the info fabiamk2se. There's no physical evidence of the loom having been butchered. The plug on the wiring harness fits both types of headlamp assembly so unless something has been done further up the line?

 

 

Massive thanks for this Wino! Just had a look on here and it looks like all the info I am missing is on here. And at €7/hour inc. printing rights I can just grab the bits I need and make them into a .pdf! No screenshots required!

 

I don't quite understand why you'd need to make anything into a pdf; everything there is already available in pdf format to download, isn't it?

 

If I can assist with interpretation of the wiring diagrams, I'd be happy to. The main knack to it is that wires that end in rectangular boxes with a number inside continue at the current track (numbers along the very bottom of each diagram) corresponding to that number, often/usually on a different diagram.  When you find that current track, you'll find a 'partner' rectangular box with a number inside, which refers back to the current track you just came from.  A sort of 'to'/'from' system, if that makes any sense.

You got the 'chrome' lights or 'black lights'?

You got the 'chrome' lights or 'black lights'?

Its a prefacelift

Black lights didnt come in until the facelift

But the prefacelift silver projectors work in the same way as the black pack ones (:

Hi guys,

 

PROBLEM SOLVED! And to my embarrassment it was a fuse all along!

 

So I downloaded all of the technical information, documentation and data sheets for the Fabia II from erWin. This was actually very useful and provided me with the circuit diagrams and crucially the relay holder layout. It turns out I do have the correct headlights fitted. The single H7 halogen bulb functions as the dipped and main beam by means of a shutter on the headlight assembly. When the main beam is activated, a solenoid in the headlight moves the shutter and changes the light output of the headlight. This solenoid is actuated by a relay cct which is protected by a fuse. Fuse no. 36 (5A) is this fuse and it turns out it was blown! What is super annoying is that the car had previously (albeit briefly) been to a local garage for this problem who had informed me that all the fuses were good. Needless to say I won't be going there again for anything!

 

It is worth noting that in the documentation from Skoda, fuse 36 has two different functions depending on which type of headlight is fitted and I don't think it is particularly clear. It says "SB36 - Main Beam Headlight (H4)" then beneath this it says "Solenoid for dazzle adjustment of headlight (Bi - halogen H7)". If, like me, you are unfamiliar with projector headlights this translates as 'Main beam for an H7 bulb'. Anyway, lesson learnt!

 

If anyone is interested, the relay for this solenoid is in the left hand side of position 10 in the relay carrier. The cct diagram shows these two relays as 10.1 and 10.2. 10.2 is the "headlight dip relay". I guess it is entirely possible that a fault with this relay could have caused the blown fuse in the first place but I suspect that it's more likely that the incorrect H4 headlight that was fitted previously is to blame. Fuse 36 should be a 15A fuse when used with H4 bulbs so when there was one H4 and one H7 it was probably just drawing enough current to pop the fuse.

 

Anyway, thanks for everyone's help and input on this. Total spend was £6.10p and 98% of that was on documentation.

 

Ciaron

Glad youre sorted.

I didnt realise the shutter used a fuse on its own.

Every days a school day! (: