Dashboard & rear lights out (1 Viewer)

[isitfriday]

Ford Transit 1997, Duetto.
Before I take it to a garage I would like to try and sort this out myself first.
After washing the van I lost my rear lights and dashboard lights, but I have rear indicators, brake lights and front main beam.
I have check the fuses but they all seem ok.
How do I know which relay serves these lights, and the manual says do not remove the relays in the engine compartment get a garage to do it. So I'm a bit hesitant to try the next stage.
There are some relays in the cab fuse box, but I've no idea which one is it a question of trying them all?
Or should I take it to a garage?
Or widely spray WD40 at any electrical joint I can see.? ( that's my female answer) I'm sure that worked in 1970!

( I will be out all day so I won't be able to read messages until tonight, so I can't reply imeadiately ) thanks

 

[Derbyshire wanderer]

Do the front sidelights work?
If not, it is likely the switch at fault.

 

[isitfriday]

I haven't checked that but will do

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[isitfriday]

But if I switch the lights on the front come on, if it was the switch why aren't both out?

 

[mid4did]

I would look for the obvious first.You say this happened after you gave it a wash.
Is there a junction box underneath/over or anywhere where water can get in?

 

[jezport]

Check the fuse first then the rear lights for water ingress, if none found check for junction boxes and work back to the fuse box

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[isitfriday]

Thank you
I will try all of the above,

 

[jollyrodger]

From memory side lights front and rear on the same fuse with the dash lights s @Leftlegger says check to see what you got wet ,have you a towing lighting socket ? Would still be all the same fuse ,let us know

 

[Badknee]

I always thought that side lights have two fuses, one for each side so that if one went you would still have a side light back and front?

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[Wickolad]

If you have a Towbar fitted, check behind the rear light clusters to see if the bypass relay is fitted there and has been flooded with water. I had a similar problem after directing hose pipe on edges of light clusters to clear some dirt and shortly afterwards actually heard the unit buzzing and relay clicking like crazy. As this unit contains contacts for near side and offside lights it may be worth checking. The other poster was right to state it is usually fused seperately nearside & offside. But if enough water has entered the relay unit it could be causing earth problems or even a short.

 

[isitfriday]

Thanks for all the quality advice, I'll try and have a good look underneath and around at the weekend. I'll let you know.