Rangerover Inertial Switch

S

Steve

Guest

• Aug 12, 2006

• #1

My Haynes joke book says that there's an inertial switch in the fuel pump
electrical circuit (3.5 efi). The fuel pump seems to have suddenly stopped
working so I'm wondering if this switch has somehow "gone off" (it could, of
course, be that the pump's shagged!). All the wiring/fuses seem intact.
Does this switch thing reset itself, can I reset it and if so how, do I have
to get another one, are they cheaper than pumps (the efi type tank pump).
Your thoughts would be much appreciated.

Thanks,
Steve

 

S

Steve

Guest

• Aug 12, 2006

• #2

I forgot .... where is this switch thing anyway?!!

"Steve" <[email protected]> wrote in message
news[email protected]...
> My Haynes joke book says that there's an inertial switch in the fuel pump
> electrical circuit (3.5 efi). The fuel pump seems to have suddenly
stopped
> working so I'm wondering if this switch has somehow "gone off" (it could,
of
> course, be that the pump's shagged!). All the wiring/fuses seem intact.
> Does this switch thing reset itself, can I reset it and if so how, do I
have
> to get another one, are they cheaper than pumps (the efi type tank pump).
> Your thoughts would be much appreciated.
>
> Thanks,
> Steve
>
>

 

N

Nige

Guest

• Aug 12, 2006

• #3

Steve wrote:
> I forgot .... where is this switch thing anyway?!!
>
> "Steve" <[email protected]> wrote in message
> news[email protected]...
>> My Haynes joke book says that there's an inertial switch in the
>> fuel pump electrical circuit (3.5 efi). The fuel pump seems to
>> have suddenly stopped working so I'm wondering if this switch has
>> somehow "gone off" (it could, of course, be that the pump's
>> shagged!). All the wiring/fuses seem intact. Does this switch
>> thing reset itself, can I reset it and if so how, do I have to get
>> another one, are they cheaper than pumps (the efi type tank pump).
>> Your thoughts would be much appreciated.
>>
>> Thanks,
>> Steve

ISTR it's in one of the footwells behind some trim. Just looking through my handbook deosnt mention it
now for some odd reason!

I'll have another look.

Nige

 

O

Oily

Guest

• Aug 12, 2006

• #4

"Nige" <[email protected]> wrote in message
news:[email protected]...
> Steve wrote:
> > I forgot .... where is this switch thing anyway?!!
> >
> > "Steve" <[email protected]> wrote in message
> > news[email protected]...
> >> My Haynes joke book says that there's an inertial switch in the
> >> fuel pump electrical circuit (3.5 efi). The fuel pump seems to
> >> have suddenly stopped working so I'm wondering if this switch has
> >> somehow "gone off" (it could, of course, be that the pump's
> >> shagged!). All the wiring/fuses seem intact. Does this switch
> >> thing reset itself, can I reset it and if so how, do I have to get
> >> another one, are they cheaper than pumps (the efi type tank pump).
> >> Your thoughts would be much appreciated.
> >>
> >> Thanks,
> >> Steve
>
> ISTR it's in one of the footwells behind some trim. Just looking through
my handbook deosnt mention it
> now for some odd reason!
>
> I'll have another look.
>
> Nige
>
It's under the front seat, passenger side I think, there's a button on it,
press to reset.

Martin.

 

B

beamendsltd

Guest

• Aug 12, 2006

• #5

In message <[email protected]>
"Steve" <[email protected]> wrote:

> My Haynes joke book says that there's an inertial switch in the fuel pump
> electrical circuit (3.5 efi). The fuel pump seems to have suddenly stopped
> working so I'm wondering if this switch has somehow "gone off" (it could, of
> course, be that the pump's shagged!). All the wiring/fuses seem intact.
> Does this switch thing reset itself, can I reset it and if so how, do I have
> to get another one, are they cheaper than pumps (the efi type tank pump).
> Your thoughts would be much appreciated.
>
> Thanks,
> Steve
>
>

It's on the bulkhead, about in the middle - a small cubey thing -
it's got a reset button on top if I remember right, but it may have
been an indicator.

Richard
--
www.beamends-lrspares.co.uk [email protected]
RISC-OS - Where have all the good guys gone?
Lib Dems - Townies keeping comedy alive

 

S

SimonJ

Guest

• Aug 13, 2006

• #6

>> >> My Haynes joke book says that there's an inertial switch in the
>> >> fuel pump electrical circuit (3.5 efi). The fuel pump seems to
>> >> have suddenly stopped working so I'm wondering if this switch has
>> >> somehow "gone off" (it could, of course, be that the pump's
>> >> shagged!). All the wiring/fuses seem intact. Does this switch
>> >> thing reset itself, can I reset it and if so how, do I have to get
>> >> another one, are they cheaper than pumps (the efi type tank pump).
>> >> Your thoughts would be much appreciated.
>> >>
>> >> Thanks,
>> >> Steve
>>
>> ISTR it's in one of the footwells behind some trim. Just looking through
> my handbook deosnt mention it
>> now for some odd reason!
>>
>> I'll have another look.
>>
>> Nige
>>
> It's under the front seat, passenger side I think, there's a button on it,
> press to reset.
>
Accessible from behind the front passenger seat, with the seat slid right
forward.
Little brown plunger thingy on top, about 3/8" diameter, which will be stuck
up if the switch has been triggered. Push down to reset.

 

S

Steve

Guest

• Aug 13, 2006

• #7

"SimonJ" <[email protected]> wrote in message
news:[email protected]...
> >>
> > It's under the front seat, passenger side I think, there's a button on
it,
> > press to reset.
> >
> Accessible from behind the front passenger seat, with the seat slid right
> forward.
> Little brown plunger thingy on top, about 3/8" diameter, which will be
stuck
> up if the switch has been triggered. Push down to reset.
>

Excellent, thanks. That'll be why I couldn't find anything on the bulkhead.
It's definitely not the pump by the way - I got it running by bridging the
fuel pump cut-off relay under the drivers seat. I'm hoping that this
inertial doo-dah is what's at fault as at the moment there's no "signal" to
the pump relay (the white/green wire on pin 85 of the relay is dead for some
reason).

Steve

 

S

Steve

Guest

• Aug 13, 2006

• #8

"SimonJ" <[email protected]> wrote in message
news:[email protected]...
> Little brown plunger thingy on top, about 3/8" diameter, which will be
stuck
> up if the switch has been triggered. Push down to reset.
>

I forgot to ask - is this doo-dah actually under the front passenger seat or
hidden behind the trim on the middle door pillar?

Steve

 

E

EMB

Guest

• Aug 13, 2006

• #9

Steve wrote:

> Excellent, thanks. That'll be why I couldn't find anything on the bulkhead.
> It's definitely not the pump by the way - I got it running by bridging the
> fuel pump cut-off relay under the drivers seat. I'm hoping that this
> inertial doo-dah is what's at fault as at the moment there's no "signal" to
> the pump relay (the white/green wire on pin 85 of the relay is dead for some
> reason).

Remember that the pump won't get a signal unless the engine is
cranking/running.

--
EMB

 

O

Oily

Guest

• Aug 13, 2006

• #10

"Steve" <[email protected]> wrote in message
news:[email protected]...
> "SimonJ" <[email protected]> wrote in message
> news:[email protected]...
> > Little brown plunger thingy on top, about 3/8" diameter, which will be
> stuck
> > up if the switch has been triggered. Push down to reset.
> >
>
> I forgot to ask - is this doo-dah actually under the front passenger seat
or
> hidden behind the trim on the middle door pillar?
>
> Steve
>
>
Actually under the seat, towards the back and near to the transmission
tunnel, and as Simon says, accessible from the back.

Martin

 

S

Steve

Guest

• Aug 14, 2006

• #11

"EMB" <[email protected]> wrote in message
news:[email protected]...
> Steve wrote:
>
> > Excellent, thanks. That'll be why I couldn't find anything on the
bulkhead.
> > It's definitely not the pump by the way - I got it running by bridging
the
> > fuel pump cut-off relay under the drivers seat. I'm hoping that this
> > inertial doo-dah is what's at fault as at the moment there's no "signal"
to
> > the pump relay (the white/green wire on pin 85 of the relay is dead for
some
> > reason).
>
> Remember that the pump won't get a signal unless the engine is
> cranking/running.
>

Thanks. I'd thought of that and had the meter on it whilst my audience was
cranking the engine. I also tried to sneak up on the cut-out relay by
disconnecting the oil pressure sensor to make it think that the oil pressure
was up, all to no avail. There's still no signal there even when the engine
is running (using my bridge/bodge on the cut-out relay). I'll get at the
inertial thingy tomorrow, but it could still also be that something has got
chopped or dropped off where I haven't been able to see.

Steve

 

S

SimonJ

Guest

• Aug 14, 2006

• #12

> Excellent, thanks. That'll be why I couldn't find anything on the
> bulkhead.
> It's definitely not the pump by the way - I got it running by bridging the
> fuel pump cut-off relay under the drivers seat. I'm hoping that this
> inertial doo-dah is what's at fault as at the moment there's no "signal"
> to
> the pump relay (the white/green wire on pin 85 of the relay is dead for
> some
> reason).
>
In that case, its not the inertia switch.
The Inertia switch is in the power line to the pump, not the signal wire to
the relay.

 

S

Steve

Guest

• Aug 14, 2006

• #13

"SimonJ" <[email protected]> wrote in message
news:[email protected]...
> > Excellent, thanks. That'll be why I couldn't find anything on the
> > bulkhead.
> > It's definitely not the pump by the way - I got it running by bridging
the
> > fuel pump cut-off relay under the drivers seat. I'm hoping that this
> > inertial doo-dah is what's at fault as at the moment there's no "signal"
> > to
> > the pump relay (the white/green wire on pin 85 of the relay is dead for
> > some
> > reason).
> >
> In that case, its not the inertia switch.
> The Inertia switch is in the power line to the pump, not the signal wire
to
> the relay.
>

Hmm. Time to ferret around a bit more then to see what's hanging off from
where. Why is it that one tiny little wire can cause the whole show to be
cancelled and yet mechanically a vehicle can clatter, bang, leak, belch,
wobble, grind and gyrate and yet still get you from A to B?

Steve