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Hi, I recently bought a 2010 xf, and today the battery warning light came up, I looked at the battery and all seems fine apart from this lone wire (see attached picture)
50335
that doesn't seem to connect to anything, could this be why the battery warning light is on? Any idea where this wire goes?
 

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If the light was originally off but then came on while you were using the car, then I'd be surprised if that wire is the problem. It's unlikely to have just come adrift whilst the car was in use.
You could try registering on the Topix website, this may give you access to a wiring diagram. Here's a link.
 

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Before you do that, get your Battery's Cranking Amp tested to see if you just need to replace your battery.
 

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Hi, I bought Jaguar XF sport 2012 in August this year after one day had battery low warning light come up when radio on and the engine was off and then after a week started getting occasional error messages. This went on for a few weeks getting steadily worse and then the car refusing sometimes to start. After lots of research on Google decided to change the battery. As soon as the battery was changed all faults disappeared for about a week and then lots of faults started coming back faults I hadn’t seen before (gearbox fault, parking brake, DSC plus many others) and again difficult to start car. Decided to take it to a specialist indi garage and they diagnosed a loose battery connection. Cleared faults, reprogrammed etc and so far all good. Also got them to carry out full service. Battery was original so had done well. From my own experience I would change battery but make sure you get it done by specialist who knows how to programme it in and tighten properly... I made mistake of getting a well known battery supplier to do mine but they didn’t have the experience needed.
 

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Ok, so it's been 2 months since the last post on this thread, but I found out that the loose wire (which fits in the little slot as shown in the pic above) is actually transit relay that gets unplugged when the car is safety checked after being sent on a vehicle transporter. It stops the car being started if transporters don't follow the procedure set down by Jaguar when the car is in transport mode (like from the factory to dealership).

I am putting this post up for people in the future who may search the forum so they will then know what it is.
 
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