Number driving /front fog lights (1 Viewer)

[tojo]

Have Hymer b584 2003 , discovered that the front driving lights had fallen apart , the back of the light fitting had melted resulting in in bulb assembly falling out , I have replaced with led lights however I cannot get the to work , have checked the fuses and they seem ok , is there a relay that supplies these lights , if so where is it ?
Regards Steve

 

[Lenny HB]

I assume you are talking about the fog lights mounted low down in the front molding.
The relay will be the standard Fiat fog lamp relay I think it is in the relay box under the bonnet on the left hand side near the air filter.

 

[pappajohn]

If your van is new enough to have a CANBUS system that's your problem.
The system can't 'see' any meaningful resistance on the leds so thinks a bulb has blown.
You will need Canbus ready leds.

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[Lenny HB]

If your van is new enough to have a CANBUS system that's your problem.
The system can't 'see' any meaningful resistance on the leds so thinks a bulb has blown.
You will need Canbus ready leds.

Agree, you can just buy a ballast unit, need to make sure they are for the correct wattage as original bulb. or you can buy bulbs with the balast built in.

Amazon.com : Headlamp balast resistor

 

[tojo]

That's me lost straight away , what is a Canbus system ? I suppose I'll need to check if there is a supply before I connect to the led's , just thought that I could straight swap , they are rated as 12W .
Regards Steve

 

[autorouter]

I have replaced with led lights however I cannot get the to work ,

Just a thought, LEDs unlike ordinary lamps only work if they are connected the right way round. if the supply is reversed they don't work. I had that happen with those little marker lamps that can fit either way round.

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[Lenny HB]

Actually the X244 doesn't have a CANBUS, they started with the X250 in 2006.

 

[poppycamper]

Have Hymer b584 2003 , discovered that the front driving lights had fallen apart , the back of the light fitting had melted resulting in in bulb assembly falling out , I have replaced with led lights however I cannot get the to work , have checked the fuses and they seem ok , is there a relay that supplies these lights , if so where is it ?
Regards Steve

Never heard of front driving lights ( unless you mean main headlight units) before. You surely mean Day Time Running Lights or front fog lights!!

 

[tojo]

Hi There
Yes they are the front fog lights , the one's low down .
Steve

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[poppycamper]

Tojo your initial description as "front driving lights" in itself is a worry... I trust it is just a figure of speech and you are not one of the many illegal drivers who drive about in clear weather with those front fog lights blazing. One of my pets hates and dont get me going about roundabouts!!!!!!

 

[hilldweller]

what is a Canbus system ?

A system of wiring designed to make a simple job unbelievably complicated.

Basically instead of a wire to a simple switch then to a bulb you have:

Simple switch to computer ( please turn on light ). Computer to electronic switch ( turn on light ). Electronic switch to bulb ( turn on power, is current correct ? Send result to computer ). Computer ( is current correct ? If NO then activate warning system ).

It does save some copper wire. It does allow the electronic switch to test the bulb. But when it goes tits up only a few expensive technicians can attempt to sort the problem using test gear that you or your local garage can't buy then usually with "sorry mate you need a new XXXX and reprogramming, that will be £NNNN and it will take a week to get here from Germany.

 

[tojo]

Tojo your initial description as "front driving lights" in itself is a worry... I trust it is just a figure of speech and you are not one of the many illegal drivers who drive about in clear weather with those front fog lights blazing. One of my pets hates and dont get me going about roundabouts!!!!!!

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[poppycamper]

?????

 

[Figaro]

I would look at the connections in the loom behind the bumper.
There is one directly adjacent to the fog lights and another larger one slightly further up.
It was the larger one that caused me some grief but a clean up with a wire brush and a few blobs of vasaline on the terminals and all was good.

 

[tojo]

Thanks Figaro
I'll have a look .
Steve

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[Lenny HB]

A system of wiring designed to make a simple job unbelievably complicated.

 

[Louis]

Have Hymer b584 2003 , discovered that the front driving lights had fallen apart , the back of the light fitting had melted resulting in in bulb assembly falling out , I have replaced with led lights however I cannot get the to work , have checked the fuses and they seem ok , is there a relay that supplies these lights , if so where is it ?
Regards Steve

check them working directly from battery

 

[SIFTA SAM]

A 2003 Hymer will not be fitted with the Canbus system.
The low positioned 'fog lights' are only selectable when either low beam or high beam lights are switched on.

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[tojo]

Hi there
thanks to you all for your comments , reversed the red and black to the blue and brown and they work !

 

[Bustup15]

A system of wiring designed to make a simple job unbelievably complicated.

Basically instead of a wire to a simple switch then to a bulb you have:

Simple switch to computer ( please turn on light ). Computer to electronic switch ( turn on light ). Electronic switch to bulb ( turn on power, is current correct ? Send result to computer ). Computer ( is current correct ? If NO then activate warning system ).

It does save some copper wire. It does allow the electronic switch to test the bulb. But when it goes tits up only a few expensive technicians can attempt to sort the problem using test gear that you or your local garage can't buy then usually with "sorry mate you need a new XXXX and reprogramming, that will be £NNNN and it will take a week to get here from Germany.

That sounds like the voice of experience ?

 

[hilldweller]

That sounds like the voice of experience ?

Many years working on CNC machine tools where CANBUS started. On machines loads of wires would run from various switches/sensors back to a computer. CANBUS reduced this to two power wires and two thin data wires. Sounds good. Until it goes wrong then you stare at these two wires and cannot see what is going on, why, because the makers either charge a fortune for an analyser or they insist one of their experts is called out at £££.

So, do you get the picture ! Manufacturing is made simpler and cheaper. Customer is stitched up like a kipper.

Then, like a virus, it infected the motor industry. Now your local garage cannot out a simple repair for you. Most know it as ODB2 in vehicles.

The only glimmer of hope in motors is ODB2, On Board Diagnostics, which the EU forced on the manufacturers to provide a certain minimum service data.

Now, of course, ODB2 is also known for the way criminals can use it to steal cars.

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[Bustup15]

Many years working on CNC machine tools where CANBUS started. On machines loads of wires would run from various switches/sensors back to a computer. CANBUS reduced this to two power wires and two thin data wires. Sounds good. Until it goes wrong then you stare at these two wires and cannot see what is going on, why, because the makers either charge a fortune for an analyser or they insist one of their experts is called out at £££.

So, do you get the picture ! Manufacturing is made simpler and cheaper. Customer is stitched up like a kipper.

Then, like a virus, it infected the motor industry. Now your local garage cannot out a simple repair for you. Most know it as ODB2 in vehicles.

The only glimmer of hope in motors is ODB2, On Board Diagnostics, which the EU forced on the manufacturers to provide a certain minimum service data.

Now, of course, ODB2 is also known for the way criminals can use it to steal cars.

If you think trying to sort out an issue with only 2 data wires, try sorting out an issue on an RF based system where you can't see anything . I know which one our engineers prefer.

 

[hilldweller]

try sorting out an issue on an RF based system where you can't see anything .

I spend hours doing that now. I'm surrounded by ESP286/ESP32 chips. It keeps the old grey cells ticking over. But I don't do anything "mission critical" with them. A fountain here, a light there, a temperature somewhere else. And of course a MH alarm but definitely not using RF.

 

[poppycamper]

Sorry but this thread has gone way over my head..
Anybody else out there not got a clue what is being said.
CONFUSED!!!!!!???

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[hilldweller]

Sorry but this thread has gone way over my head..

Nothing to be ashamed of, we are talking very complex control electronics here. It's a specialised thing.

I'm crap at brain surgery,

 

[tonyidle]

Hi there
thanks to you all for your comments , reversed the red and black to the blue and brown and they work !

Yes the often made mistake of relating wire colours used for mains to the same colours used for 12v. Generally, and most definitely on a Hymer, blue is +12 and brown is 0v.

 

[poppycamper]

Nothing to be ashamed of, we are talking very complex control electronics here. It's a specialised thing.

I'm crap at brain surgery,

I am not much good at that either ⛑⛑

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[Vipar]

Tojo your initial description as "front driving lights" in itself is a worry... I trust it is just a figure of speech and you are not one of the many illegal drivers who drive about in clear weather with those front fog lights blazing. One of my pets hates and dont get me going about roundabouts!!!!!!

Go on tell about roundabouts in a roundabout way ?