>>The part incidentally is F2AB-9341-AA.
That part number is too new to have come from the donor car.
Has this car got a Mk4 or Mk5 Fiesta dash fitted ?
Jim
From: jul...@cityaudioservices.com
Sent: Monday, September 26, 2022 12:10 PM
To: quantumowners@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch
Hi
Further investigation is proving tricky. Having removed the connector and so
gained access to the loom wiring I can find no link from the fuse (F19) to the
connector and no link from the connector to the now cut feed wire to the pump
(there being a temporary positive feed to the pump to keep it going). Both
should exist. None of the three wires connect to ground or indicate power at
any time.
The only explanation I can think of is that the unit was problematic and it has
been short circuited and it is that connection which has failed. My problem of
course is I have no idea where that might be. So the hunt will go on.
Incidentally the unit is certainly the impact sensor. I managed to read the
part number and found one on e-bay and despite it being from a Ka it is
identical - except mine does not have the red button, just a hole where the red
button should be! So perhaps that explains the disconnection theory. It broke
so it was dispensed with. Anyway, I have the e-bay unit on order.
The part incidentally is F2AB-9341-AA.
Now I just have to find the bodge.
Regards and thanks for all the help
On 2022-09-26 09:12, jul...@cityaudioservices.com wrote:
Thanks for the additional information, very useful.
On 2022-09-25 23:20, list...@liberator-systems.co.uk wrote:
Inertia switches are readily available from breakers, Ebay etc. Most are 3
pin but often connector only uses 2 of the pins.
The one I fitted in my saloon came from a Ford Fusion, Fiesta or similar
(the type with yellow top).
If you get one from breakers best to get complete with male connector plug
and short section of wiring harness - this make it easy to wire into existing
loom. Failing that you need to make connector plug - easy enough - most are 3
way AMP connector.
In my setup I also installed a bypass switch and a dashboard warning led to
show if inertia switch has been triggered (this requires 3rd wire connection).
John
On Sunday, 25 September 2022 at 16:33:07 UTC+1 julian wrote:
Hi
I have found an air bag sensor (though there are none in the car of
course) and close by another potential suspect - see attached. It's the right
sort of size but has three connections where the manual says two, although one
appears at least to be the right colour code. Also it has no reset button.
However what it does have at the top is a cylinder which might once have been
the housing for a plunger.
I haven't yet tried testing anything like circuit tracing because the
plastic of the connector look easy to break. If it is the right unit, I will
attempt to remove it and see if it can be reset.
Alternatively do you know if a replacement might be obtained?
Julian
On 2022-09-23 14:33, Jim Hearne wrote:
It's bigger than you might think, maybe 50 x 40 x 30 with the red
button on the top.
Jim
From: jul...@cityaudioservices.com
Sent: Friday, September 23, 2022 2:30 PM
To: quantu...@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch
All
I'm assuming from what I can see on the web it's likely to be a small
flattish black box.
Fingers crossed I can find it.
Thanks as ever for the help
On 2022-09-23 14:09, susanandmartin wrote:
As Steve said, near the door (A) pillar is a common place. In a
Mondeo (company car) a work colleague had a flat tyre and changed it, then the
vehicle wouldn't start – you can imagine he was pretty exasperated. It turned
out the inertia switch was in the boot near where he dropped the punctured
tyre/wheel!
Martin Scott
Sent from Mail for Windows 10
From: 'Steve Kodź' via Quantum Owners Group
Sent: 23 September 2022 13:41
To: quantu...@googlegroups.com
Subject: Re: [Quantum Owners] H4 electrics - inertia switch
Julian,
Not sure about a standard location, but I think the wiring would
naturally position this in the passenger foot well area. Mine was attached to
the chassis door pillar in the passenger foot well.
Regards,
Steve
On 23/09/2022 13:38, jul...@cityaudioservices.com wrote:
Hi
My H4 cut out unexpectedly at the MoT garage after being driven
into the brake test equipment which involved the car being grounded! Looking at
the circuit diagram there are several potential reasons why this happened, most
of which I know how to diagnose and where to look. But one possible potential
problem is the impact sensor which is shown in the Haynes manual.
Does anyone know if these are usually refitted in an H4 and if so
is there a 'standard' location? It might help me locate it without having to
dismantle the entire vehicle. If anyone has a photo of the actual unit I'm
looking for, that would also help.
Thanks
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