LR Discovery question

[killer_pigeon]

mate has an old N reg disco 300TDi

 

He foolishly took it through a car wash and the lights wont work at all. Back, front, interior, nothing at all

 

checked all fuses and obvious places but no joy. Does anybody know if water can into the light circuitry anywhere and where he needs to check please.

 

He's had it out in storms and deep water with no problems but 1 car wash and its daylight driving only

 

thanks in advance

Edited August 15, 2012 by killer_pigeon

[WelshLamb]

have you checked the earths? bulbs?

[killer_pigeon]

yes checked bulbs, for water ingress in headlamps etc , everything bone dry, earth connection looks good with no rust or dirt

 

all we can think is the swirling brushes of car wash have flicked water in somewhere at a wierd angle onto the electrics ?

[Paul223]

Checked all the connections around the battery and under bonnet fuse /relay box

[killer_pigeon]

yes all fuses & relays ok and all dry. spent most of last week looking at everything we can think of and just cant figure it out

 

we thought warm weather last week may dry it out if water got in somewhere but still no luck

[Paul223]

.

Edited August 15, 2012 by Paul223

[Ratman2]

Try a temporary earth using jump leads, one clip on neg terminal and t'other (of the same lead) on a paint and rust free area on the body, do make sure the area you clip to on the body really is paint and rust free. Let us know the result.

Edited August 15, 2012 by Ratman2

[Paul223]

yes i'd agree, the earth point just behind the battery box, under some bits n bobs, fuse box and coolant tank, try the jump leads as above to the body, drivers door latch peg should be good and close enough

[fruitloop]

have you checked the fusable links under the bonet

[bedwards1966]

Do you have a multimeter?

If so, after checking for anything visibly wrong as you have done you need to start by following the wiring and finding out where you have power, until you find the point at which it's disappeared. I'd have thought that the problem would be before the fuse box, I'd probably start by checking to see if there is power to the fuses for the lighting circuits. Then work in the appropriate direction from there.

Is everything else working, apart from the lights? Horn, instruments, instrument lighting, ignition, starter etc?

[killer_pigeon]

thanks for replies, we will try these ideas on weekend as hes a lorry driver through week and report back findings. i have dug out a multimeter also

[neil3728]

Have you checked all the fuses or just the ones for the lights. I've had this before with mine and it turned out to be a blown fuse that had nothing to do with the lights at all.

 

only way i found it was by pulling all the fuses one by one.

 

Do the lights on the instruments work at all.

[walshie]

Sometimes when it's been chucking it down, my rear wiper and rear windows stop working, but a few hours later they are fine.