Hi,

I have recently purchased a 2012 Jaguar xfs. Last week the hazard lights started coming on randomly and not switching off. Unless I turned engine off and pressed the button. I was inspecting the boot today and there was a small amount of water in the footwell and on the rear BCM. I pulled all of the connectors to check for corrosion and the two bottom connectors were rusted with blue gunk - see attached photo. Does anyone know what might cause this and if it's possible there is capillary action going on through the wires? I've cleaned them off but want to get to the root of the problem.

Thanks

Maybe some 99% isopropyl alcohol and wash the terminals out, tooth pick the male terminals to very gently clean between. just be super careful.

But ideally need to find out where the leak is as well or will just get worse.

The photos are a bit blurry, but the "blue gunk" is most likely copper sulphate - a corrosion product from copper and water getting together, but you probably knew that already. Did you test the water you found in the boot? Was it freshwater, i.e. rain or from washing, or was it road wash - include a salt? Historic areas of water ingress are around the periphery of the rear light clusters. The seals are not 100% after time and an application of a suitable silicon type sealant can help greatly.

Whilst the boot lid seals are not generally a problem, you can check these by applying a liberal coating of chalk (talcum powder will also work) and then dousing the closed boot lid with plenty of water - hosepipe or rain. Then check to see if any of the chalk / powder has been "washed away".

N6 JMX

Thanks for the tips. I did get in the boot and have my wife spray all around the lights and boot with the hose but couldn't see or feel any water coming in. I'll give the chalk/talcum powder idea a try as I hasn't thought of that. Didn't test the water but it was quite clear so assumed it was rain water. There were two small pools. One underneath the battery tray and the other in behind the fuse box