Lighting issues

[Spellman94]

This one is a lot to take in when writing it out, I have had a warning light warning light come on the dash and this is what is happening with the car…

Front left head light off
Front right head light on
Front left side light on
Front right side light off
Rear left side light off
Rear Left inside light on
Rear right side light on
Rear right light off
Reg plate lights off
Front left indicator on
Front right indicator off
Back left indicator off
Back right indicator on
Reverse light off

Iv had it plugged in but I think it had old faults that haven’t been cleared but it does say terminal 30 left open circuit open circuit intermittent, terminal 30 right open circuit, if anybody could shine some light on what might be the issue please, it’s a 2010 seat Altea XL

 

[Tell]

You have my sympathy, you have a similar issue I once had on my old Altea. The lights came on even if switched off. The garage said ah difficult electrical switch box. It was going to be a paid diagnosis and expensive repair. Fixed itself after a couple of days. Reckon it was dampness in the said box. I saved myself the money and didn't give it to the garage. Had another similar issue where the car refused to start up, that fixed itself as well...

Pass on throwing light on it, except it's a known issue with Alteas that they go off on one linked to that electrical box.

 

[mty12345]

Did you get this sorted mate? If not then i would start by deleting the codes and seeing which ones come back.

Without a wiring diagram it's extremely hard to say. If you want my best guess then probably the body control module, or the main power relay. Whichever controls the terminal 30 power supply for all those components. ... Would have to see a wiring diagram to get a better idea though. unfamiliar with the setup on the Altea. If you know where the 'box' they are on about is located, then it would be worth unplugging the connector and looking inside for any green/blue crusty corrosion. If you find corrosion, then disconnect the battery, and clean both sides of the plug with a soft toothbrush and some 99% isopropyl alcohol. Be extremely careful not to bend any pins!! The alcohol will evaporate after cleaning.

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