front fog lamps

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reddevil2010

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Ashton Under Lyne Near Oldham Manchester
Hi all ive got 1996 2.5 diesel auto problem ive got is front fogs wont work bulbs are new,but i dont know which fuse or relay it is for them as it dont tell me either in manual or on fuse box covers.I wasa told the switch could be faulty but how the hell do you get them out of the dash ? its my 1st range rover so new to it all any info wolud be most helpful thanks all.
 
First off you should not have front fogs fitted on the diesel auto as it stops the airflow to the auto box oil cooler.

The fogs, if they use the standard P38 wiring harness, are controlled from the BECM, if they have just been fitted they will have to be enabled in the BECM with Testbook or Faultmate.
 
There is no specific fuse for the fog lamps (or for any of the side / head / reversing lights). The current is monitored internally in the BeCM and if there is an overload, it is switched off electronically, so no fuse required. As far as I know, it's only the lights that are controlled like this. Is the light coming on in the switch itself? The switches are 'just' push in and therefore pull out with a bit of careful prising. They don't usually fail. It could be that someone has installed the fog lights other than the factory in which case the BeCM may need 'telling' that there's fog lights there (The wiring was always pre-installed but the fog lights themselves were extras on some models in which case the BeCM wasn't enabled for them).
 
Derek Ward said:
There is no specific fuse for the fog lamps (or for any of the side / head / reversing lights). The current is monitored internally in the BeCM and if there is an overload, it is switched off electronically, so no fuse required. As far as I know, it's only the lights that are controlled like this. Is the light coming on in the switch itself? The switches are 'just' push in and therefore pull out with a bit of careful prising. They don't usually fail. It could be that someone has installed the fog lights other than the factory in which case the BeCM may need 'telling' that there's fog lights there (The wiring was always pre-installed but the fog lights themselves were extras on some models in which case the BeCM wasn't enabled for them).
Click to expand...
Hi Derek thanks for your info, the switch is lighting up bulbs are new but they wont light up ive only had it a week and the bloke i got it off said they was working.Where is the "BeCM" located as someone else has mentioned that as well as you thanks Jeff.
 
The BeCM is located under the drivers seat. You need specialised equipment to electronically access it (through the OBD2 diagnostics socket). Either LandRover Testbook or Faultmate from Black Box Solutions in Cyprus.
If the light in the switch is lighting up when you press it, it sounds like the BeCM is activated for the fog lamps (although Irishrover may correct me on that) but it's not putting anything out. You'll need to measure the voltage at the connectors for the foglamps to check if there's anything there. They're fed from different connectors from the BeCM. It's unlikely that both would have a fault together.
 
You can only fit fog lamps if you have the special bumper with vents and ducting. I have one on my DSE. Don't ask where you get them i don't know. I have never seen another Rangie with one on.
 
I have the same problem although mines a petrol so is allowed to have fog lamps.
The switch in the dash lights up when pressed but no fogs.
Is the switch powered by the car and when pressed, send the signal to the BeCM which then turns the lights on (indicating that even though it lights up, it needs activating)
I bought the car with the fogs fitted, standard LR with what looks like genuine wiring but they've never worked.

Anyone with a Faultmate near Manchester?
 
No, the switch send a signal (by earthing the line) to the BeCM and that in turn send 12V to the bulb in the switch and separately to each fog lamp. I'd have thought that, if the bulb was lighting up, then the fog lamps would work as well. Have you checked whether you're getting 12V at the fog ;amp connectors behind the bumper?
 
Have you tried the fogs with dipped headlights on? From memory I think the BECM can be programmed to allow the front fogs with the rear fogs, with dipped headlights, or with just the sidelights.
 
wammers said:
You can only fit fog lamps if you have the special bumper with vents and ducting. I have one on my DSE. Don't ask where you get them i don't know. I have never seen another Rangie with one on.
Click to expand...

Any chance of a pic, if ii cant find 1 i might try to copy it with a few holes here and there lol.
 
Mike v.t.s said:
Any chance of a pic, if ii cant find 1 i might try to copy it with a few holes here and there lol.
Click to expand...

It has a grille either side of the lamp with ducts and baffles to guide air into oil cooler. It's not a bodge up it's a proper bumper cover they must have been available from somewhere in 1999 but i have not been able to find any reference to them. It looks like a proper Land Rover item. So maybe a dealer would know.
 
wammers said:
It has a grille either side of the lamp with ducts and baffles to guide air ito oil cooler. It's not a bodge up it's a proper bumper cover they must have been available from somewhere in 1999 but i have not been able to find any reference to them. It looks like a proper Land Rover item. So maybe a dealer would know.
Click to expand...

I was hope'in to cut a hole either side of the foglight and usin somthin like a skin fitting we use on boats with ducting to push air threw to oil rad, it would of looked good (not a dodgy bad bodge i hope)
then i thought what if i fitted a small fan on the back of the rad (more of a 6" or lower size) that was wired to an ignition live...

but then the mud would probrably kill it, and the fan wouldnt last for long being constantly on.:doh:
 
Datatek is right about the switching options.
The switch does indeed switch on the negative (Ground) supply and sends an input to the Becm. When the foglamps are enabled in the Becm profile, an output is sent to the lamps.
Check for 12V at the foglamp connectors in all of the following situations with the front foglamp switch on and illuminated:


Rear foglamps on.
Sidelamps on
Dipped Beam on
Main Beam on

If the 12V is not present, chances are that they need to be enabled in the Becm which is a 5 minute job with Test Book, Faultmate SM022 Body control module or Autologic diagnostics.
:behindsofa:
 
Cheers Irish but as has already been mentioned by Data, the swith lights up so its a fair assumption that the BeCM is enabled ye?
 
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