last year at a local cottage party I was attending I had a
few too many drinks…someone wanted to leave and my car was
in the way… end result broken spoiler and no more side
light and flasher…dumb dumb me.
after inspection of the damage I noticed that the wire had
been pulled off of the side light and flasher. today I
replaced both and reconected but nothing…
my question is what is the possible reason for this?? is
there a lamp relay or something which might of blown because
of a short??
also I might add that my rear lights dont work either ( the
two red markers)
what to do guys???–
89 soverign
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In reply to a message from jameson sent Wed 8 Aug 2007:
Could easily be something in the lamp module, but first I
would check the fuses. Does anything else connected to that
module work? Assuming fuses are ok, then try swapping the
left and right lamp modules and see if the problem moves. If
it does, problem is in the lamp module. BUT, check your
fuses first!–
'88 XJ-40
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In reply to a message from XJerry sent Wed 8 Aug 2007:
hi,
I dont know about fuses, I suppose I would get a circuit failiure
warning if that was the case right?
what else is connected to the module? the right flasher and side
lamp arnt working. I dont know what else operaes on the module…
everything else seems to work, low beams high beams ect…
also my rear ‘‘marker’’ lights dont work either but I suspect
corrosion od the sockets might be to blame, I will try sanding them
as previously suggested.
thanks–
The original message included these comments:
Could easily be something in the lamp module, but first I
would check the fuses. Does anything else connected to that
module work? Assuming fuses are ok, then try swapping the
left and right lamp modules and see if the problem moves. If
it does, problem is in the lamp module. BUT, check your
fuses first!
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In reply to a message from jameson sent Wed 8 Aug 2007:
Last fall I was working on a rear bulb module, and I
accidentally shorted something out. It blew a fuse, but no
circuit failure warning at all, just no lights on one side
of the car. I would check the fuses before you do anything else.–
The original message included these comments:
I dont know about fuses, I suppose I would get a circuit failiure
warning if that was the case right?
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In reply to a message from XJerry sent Wed 8 Aug 2007:
well I will check once more but two monthes ago I checked and
replaced all the fuses but I will check them again.
what does module control? all the lights ex front left flasher side
light and head lights?–
The original message included these comments:
Last fall I was working on a rear bulb module, and I
accidentally shorted something out. It blew a fuse, but no
circuit failure warning at all, just no lights on one side
of the car. I would check the fuses before you do anything else.
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In reply to a message from jameson sent Wed 8 Aug 2007:
The BFMs control all of the external lights individually -
one for each corner - in that the individual lights are
switched on via their respective BFM. So, of you suspect the
BFM on one side at the front, just swap that BFM with the
one from the other front corner (not front to rear of
course!). If the fault travels with the BFM and now appears
on the opposite side, that BFM is the problem.–
The original message included these comments:
what does module control? all the lights ex front left flasher side
light and head lights?
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In reply to a message from Bryan N sent Wed 8 Aug 2007:
thanks guys, I’ve been reading the xj40 ebook, it says that these
modules fail ‘‘often’’ should I buy a few spares???
also my car is an 89 sov, I have a local breaker who has 91 xj6
modules. I checked on ebay and some ebay stores advertise modules
fitting 88-92 and some 90-94.
are the moduales interchageaable between years?? I guess the sure
way to know is with part numbers…–
The original message included these comments:
The BFMs control all of the external lights individually -
one for each corner - in that the individual lights are
switched on via their respective BFM. So, of you suspect the
BFM on one side at the front, just swap that BFM with the
one from the other front corner (not front to rear of
course!). If the fault travels with the BFM and now appears
on the opposite side, that BFM is the problem.
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In reply to a message from jameson sent Wed 8 Aug 2007:
Whoa there!
No point in rushing off to buy BFMs - even when you’ve
proved that one is flaky. Often a little re-soldering will
fix the problem.
And to answer your question about interchangeability - some
are but most are not. There are about eighteen different
part numbers for the front BFM for the quad light cars and
another dozen for the styled / Euro light versions - and
very few are interchangeable, some being peculiar to Canada
because of your ‘running light’ requirement.–
The original message included these comments:
are the moduales interchageaable between years?? I guess the sure
way to know is with part numbers…
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On my '89 XJ6 in Canada, there is another difference apparently.
I have no DRL, at least operational, the BFM does not indicate headlight
malfunction.
I had ‘heard’ that there was an operation that could be performed on the
BFM to disable the headlight warning!
Correct? or an old tech’s tale.
John Colville
Blind Bay, BC
241,000 kms
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In reply to a message from jameson sent Wed 8 Aug 2007:
Before going too far on complex issues, have you confirmed
that the Bulb fail indicator light is working? Does it light
with all the other warning lights for a few seconds at
ignition-on?–
The original message included these comments:
I dont know about fuses, I suppose I would get a circuit failiure
warning if that was the case right?
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In reply to a message from MikeSW17 sent Wed 8 Aug 2007:
I dont know what you mean by light for a few seconds at
ignition on?
if you mean turning the key to the on position and seeing
the faults come on then yes it does…
also, I tried to switch the bfms earlier to confirm they are
the problem . I was unable to remove the wires…
so one more question, there are two sets of wires comeing
out of the side of the bfm, logic tells me one if for the
headlights the other is for the side light and flasher am I
wrong???
so I need to disconect the headlight wires and the flasher
conector and side light connector and then pull ??–
The original message included these comments:
that the Bulb fail indicator light is working? Does it light
with all the other warning lights for a few seconds at
ignition-on?
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I may be wrong but it would not be just Canada as the category was
North America
I seem to recall the headlights are not connected to the BFM and dont
think they are on my car as I’ve never had a light on a bad headling
but did have one.
Jay 90 VDP Majestic
At 04:38 PM 8/8/2007, JDavid wrote:
On my '89 XJ6 in Canada, there is another difference apparently.
I have no DRL, at least operational, the BFM does not indicate
headlight malfunction.
I had ‘heard’ that there was an operation that could be performed on
the BFM to disable the headlight warning!
Correct? or an old tech’s tale.
John Colville
Blind Bay, BC
241,000 kms
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/ Calendar, On Line Books and more !
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Don’t get confused between the BFM control of the operation of the lights
(i.e all switch functions operate through the relays in the BFMs) and the
secondary function which is to monitor the light bulbs / circuits (whether
they are on or off ) and to give a dash indication if they fail. Even if
the BFM does not indicate a failure of a headlight bulb, the headlights,
high and low beam, are still switched on and off via their respective BFM.
It is easy enough to swap them left to right. There are two main cable looms
from each BFM and a number of flying lead connectors which you must un
plug - see:-
Bryan N
'91 Sovereign 4.0 L ‘SportPack’ RHD 124K
Cambridgeshire, England----- Original Message -----
From: “JDavid” jcolvill@telus.net
To: “Bryan N” <@Bryan_N>
Cc: xj40@jag-lovers.org
Sent: Wednesday, August 08, 2007 10:38 PM
Subject: Re: [xj40] side light and front flasher questions
On my '89 XJ6 in Canada, there is another difference apparently.
I have no DRL, at least operational, the BFM does not indicate headlight
malfunction.
I had ‘heard’ that there was an operation that could be performed on the
BFM to disable the headlight warning!
Correct? or an old tech’s tale.
John Colville
Blind Bay, BC
241,000 kms
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In reply to a message from Bryan N sent Thu 9 Aug 2007:
thanks bryan,
so to recap… I disonect the ‘’ round connectors’’ flasher and side
light, then unplug the headlights… will I have anything else to
unplug…I suspect I will, if so are they all accessable by going
under the bumper?
The reason im so paranoid is that there are lots of wires which are
taped and dont seem to go anywhere, I dont know if the previous
owner came up with a ‘‘bright idea’’ as he has done in many places on
my car to my dismay…also what and where are the flying lead
connections?
thanks–
The original message included these comments:
the BFM does not indicate a failure of a headlight bulb, the headlights,
high and low beam, are still switched on and off via their respective BFM.
It is easy enough to swap them left to right. There are two main cable looms
from each BFM and a number of flying lead connectors which you must un
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In reply to a message from jameson sent Thu 9 Aug 2007:
yes, you are on the correct track.
On the front BFMs there are four connectors to disconnect to
remove the unit;-
9-way round Black, 9-way round Yellow, and two 3-way black
one for the inner and the other for the outer headlamp
units. No need to go under the bumper.–
The original message included these comments:
so to recap… I disonect the ‘’ round connectors’’ flasher and side
light, then unplug the headlights… will I have anything else to
unplug…I suspect I will, if so are they all accessable by going
under the bumper?
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