More Fuse Box Woes...

M

Mark Solesbury

Guest

• Aug 1, 2004

• #1

Ok, 1st things 1st.

Its a 1987 RR V8 EFI.

If you measure the voltage over a fuse holder in the fuse box, you should
get 0 volts. Correct?

If you measure across 11 and 13, it shows 12 volts. Am I right in thinking
that this means somewhere on the circuit it is earthed out, hence being able
to read voltage across the terminals?

The only thing connecting fuse 11 and 13 to my knowledge is the indicators.
11 is for the hazards, 13 for normal indicating. Is this true?

On the basis of the above being correct, I have disconnected all of the
light clusters front and back, and traced the wiring loom inside the vehicle
from each cluster to where it goes behind the dash. All is fine. I still get
12 volts across both fuses. It is not catching the body work where is goes
though a grommet. AGGHH!!

I am at a total loss of what is causing this problem. Can anyone shed any
light on this for me please??

Mark.

 

N

Nige

Guest

• Aug 1, 2004

• #2

"Mark Solesbury" <[email protected]> wrote in message
news:[email protected]...
> Ok, 1st things 1st.
>
> Its a 1987 RR V8 EFI.
>
> If you measure the voltage over a fuse holder in the fuse box, you should
> get 0 volts. Correct?
>
> If you measure across 11 and 13, it shows 12 volts. Am I right in thinking
> that this means somewhere on the circuit it is earthed out, hence being able
> to read voltage across the terminals?
>
> The only thing connecting fuse 11 and 13 to my knowledge is the indicators.
> 11 is for the hazards, 13 for normal indicating. Is this true?
>
> On the basis of the above being correct, I have disconnected all of the
> light clusters front and back, and traced the wiring loom inside the vehicle
> from each cluster to where it goes behind the dash. All is fine. I still get
> 12 volts across both fuses. It is not catching the body work where is goes
> though a grommet. AGGHH!!
>
> I am at a total loss of what is causing this problem. Can anyone shed any
> light on this for me please??
>
> Mark.
>
>

Try a resistance test between both fuses. Or even a simple bell test, this will confirm or deny a dead
short.

Nige

 

M

Mark Solesbury

Guest

• Aug 1, 2004

• #3

> Try a resistance test between both fuses. Or even a simple bell test, this
will confirm or deny a dead
> short.
>
> Nige
>
>


Elaborate??

WTF is a bell test!!

 

N

Nige

Guest

• Aug 1, 2004

• #4

"Mark Solesbury" <[email protected]> wrote in message
news[email protected]...
> > Try a resistance test between both fuses. Or even a simple bell test, this
> will confirm or deny a dead
> > short.
> >
> > Nige
> >
> >
>
>
> Elaborate??
>
> WTF is a bell test!!
>
>

Sorry, basically it makes a circuit with either a bell o lap so it don't use resistance to measure the
short, it is actually a dead short.

 

N

Nige

Guest

• Aug 1, 2004

• #5

"Nige" <nigel.inceNO****[email protected]> wrote in message news:[email protected]...
>
> "Mark Solesbury" <[email protected]> wrote in message
> news[email protected]...
> > > Try a resistance test between both fuses. Or even a simple bell test, this
> > will confirm or deny a dead
> > > short.
> > >
> > > Nige
> > >
> > >
> >
> >
> > Elaborate??
> >
> > WTF is a bell test!!
> >
> >
>
> Sorry, basically it makes a circuit with either a bell o lap so it don't use resistance to measure the
> short, it is actually a dead short.
>
>

That should say 'or lamp' of course!

 

P

PDannyD

Guest

• Aug 1, 2004

• #6

"Mark Solesbury" <[email protected]> wrote in message
news:[email protected]
> Ok, 1st things 1st.
>
> Its a 1987 RR V8 EFI.
>
> If you measure the voltage over a fuse holder in the fuse box, you
> should get 0 volts. Correct?
>
> If you measure across 11 and 13, it shows 12 volts. Am I right in
> thinking that this means somewhere on the circuit it is earthed out,
> hence being able to read voltage across the terminals?

Erm, it means the fuse has blown.

--
FZS600 - Silver/Black
GS125 - Black/Rust
Ford 100E Prefect - Black, naturally
Whisky - Aberlour Cask Strength

 

M

Mark Solesbury

Guest

• Aug 1, 2004

• #7

> Try a resistance test between both fuses. Or even a simple bell test, this
will confirm or deny a dead
> short.
>
> Nige
>
>


Elaborate??

WTF is a bell test!!

 

N

Nige

Guest

• Aug 1, 2004

• #8

"Mark Solesbury" <[email protected]> wrote in message
news:[email protected]...
> Ok, 1st things 1st.
>
> Its a 1987 RR V8 EFI.
>
> If you measure the voltage over a fuse holder in the fuse box, you should
> get 0 volts. Correct?
>
> If you measure across 11 and 13, it shows 12 volts. Am I right in thinking
> that this means somewhere on the circuit it is earthed out, hence being able
> to read voltage across the terminals?
>
> The only thing connecting fuse 11 and 13 to my knowledge is the indicators.
> 11 is for the hazards, 13 for normal indicating. Is this true?
>
> On the basis of the above being correct, I have disconnected all of the
> light clusters front and back, and traced the wiring loom inside the vehicle
> from each cluster to where it goes behind the dash. All is fine. I still get
> 12 volts across both fuses. It is not catching the body work where is goes
> though a grommet. AGGHH!!
>
> I am at a total loss of what is causing this problem. Can anyone shed any
> light on this for me please??
>
> Mark.
>
>

Try a resistance test between both fuses. Or even a simple bell test, this will confirm or deny a dead
short.

Nige

 

N

Nige

Guest

• Aug 1, 2004

• #9

"Mark Solesbury" <[email protected]> wrote in message
news[email protected]...
> > Try a resistance test between both fuses. Or even a simple bell test, this
> will confirm or deny a dead
> > short.
> >
> > Nige
> >
> >
>
>
> Elaborate??
>
> WTF is a bell test!!
>
>

Sorry, basically it makes a circuit with either a bell o lap so it don't use resistance to measure the
short, it is actually a dead short.