Hi all. I have a 2012 TDI 4x4 Elegance with almost 200,000 miles on the clock.  Recently im getting intermittent power steering failures.  it will go heavy on poor road surfaces for a split second.  Also the radio cuts out and dash warning lights come on then reset themselves.

Shes good as gold otherwise and im sure its a simple electrical issue but that's only if its easily found.

Anyone come across this before?

Check the battery terminals are tight?

Hi

 

You are getting a power failure that affects multiple items.  This implies that a break or short circuit is happening fairly close to the power source (battery/alternator).  The power comes back on again, so it's not a blown fuse.  It's affected by vibration/rough roads.  So, the things to check are any heavy duty electrical connections, starting (as Weasley suggests) with both the battery terminals. If no problem there, look further afield for any loose connections or (less likely) places where insulation has worn through resulting in a short circuit.

 

Electric power steering is quite a "big hitter" for current demand, and will have thick cabling.  I don't have access to the Yeti manual at the moment, but suspect that it is either unfused or fed via a maxi fuse.  These are often situated on a plate right next to the positive terminal of the battery. Check that all the nuts are tight here.

2 hours ago, Austin 7 said:

I don't have access to the Yeti manual at the moment, but suspect that it is either unfused or fed via a maxi fuse.

Yes, no mention of power steering in either fuse box.

So quick update. 
following all the advice I fitted a new battery on Saturday even though the current battery appeared to be fine and cold start was good etc.  
I checked all cabling around that area and the fuse box and all appears good. 
200 miles later no warning lights or radio cutting out. 
Power steering is still a little notchy at times but it appears to be improving every day. 
I will update in a week or so and see how things are then. 
many thanks.