dojj

iTrader: (3)

from what i can see on the granada loom (i plugged it into the fuse box i've got and did a few tests) you shoudl have power supplied to the loom by the big red wire
which goes to the power relay
this then feeds the timer relay and the switch via a black and yellow wire
but there should also be power to this from the engine relay via a blue wire to the main power relay
the screen timer seems to earth the screen heater out when it powers up

it's a bit confusing like this as if i can find the proper loom i'll tell you whic wires hsould go wehre, at the moment i can't even find the wiring diagams

rapidcossie

cheers doji..
i can take the laptop oout to the car the mora and go over what you have said

dojj

iTrader: (3)

a picture is worth a thousand words mate unfortunatly i can't find the picture to take it
what you should do really is take the top of the dash apart so you can see the wires running across just below the dash
you should see one plug with 2 wires going into the rest of the loom
this is the engine running relay gubbins which is triggerd from somewehre in the ecu
with the engine running you should have power to this, which will supply power to the main power relay
then you will have wires criss crossing baout the place, but on the same section of loom as it doesn't go anywhere else other than to have one wire to iluminate the switch, the rother wiers should be black with a blue trace which goes to the timer relay, black and yellow which is normally switched pwoer from somewhere else and there should be ablack and purple one which goes to the screen itself

rapidcossie

i can see the wires going to the screen and both relays and can acces the dash where the ECU is so should be able to trace it no worries.

I have a feeling the prob lies with the wires going to the battery.

The car has had the ECU out and in tons of times recently so maybe a wire has been damaged?

KSA-Cossie

iTrader: (4)

Just hope its no a relay euan as the timer one is obsolete now

dojj

iTrader: (3)

run the car and test to see if the switch has power
then the screen wires
after that you might have to start digging about under the dash

rapidcossie

right!

i have power at red wire...12vdc.

But no power on the any other wire on the black relay...so that means the relay is gubbed yeah?


no power on black/yellow even when switchb is pressed.

dojj

iTrader: (3)

sounds like it

if it's the black 40A relay they are fairly generic so you should be able to get hold of one

rapidcossie

its black mate...any other ones like this on the car that i can swap to try?

most other ones i can see have diferent pin configurations?

dojj

iTrader: (3)

it'll either be a 40A or a 70A relay
if you can find another black relay of the same ampage it'll almost certainly fit the same pin configuration

plug it back in again and see if there is power coming out of it when everything is up and running
it might be the actualy switcher bit of the relay thats not getting power whic, in turn, isn't allowing th relay to do it's job?

rapidcossie

have trid different black relay and the probem is still there...

can get any power out of the relay and along the black/yellow wire the switch

dojj

iTrader: (3)

i've had a BIG clearout of the garage today and have still not uncovered the loom

i'll have another attempt tomorrow to find it

one thing, do you know that the relay you have replaced it with actually works?

it may be that the power that switches the relay on doesn't work, is there power getting there when you pres the switch?

rapidcossie

the relay i replace dit does work as it was the one for the rear heated screen.

I can tell if there is power at it when you hold the button down as my arms arent long enough

just pushing the button once as you normally would does fook all

Im starting to think its maybe the switch

dojj

iTrader: (3)

i've had a look and found a loom it seems that the switch gets power sent to it once you have the engine running, this also powers up the timer relay

so, if you change switch BEFORE you change the timer relay (the grey one) it should be fairly easy to figure out by procces of elimination which one it is

i've got a switch lurking baout somewhere as well as a timer relay if you want them

JamesH

iTrader: (21)

Euan

Why not just re-wire the whole circuit inside the car?

Doesn't sound like too many wires

dojj

iTrader: (3)

there are quite a few mate
more than you would think

the other thng to ask is how many wires tdo you have running to the engine running relay?
i ask because one loom has 2 and the other has 3 on the plug so there may be differences somewhere along the line

rapidcossie

that would be great mate!

ill PM you my address

i have four running to blak relay...thick red, thick black/purple, thin black yellow and one more that i cant remember with out looking.

dojj

iTrader: (3)

thems the ones
it goes to a fairly oblong bit of plastic for the relay holder right? a lot wider than normal?

and they are 70A relays too