59 minutes ago, Skodaman58 said:

SORRY!  Pic in manual is wrong way around.  Yes was no.21 which makes sense.  21 is correct.

Here are the fuses in the correct orientation for a right hand drive Yeti.
 

^ Good stuff, but those fuse definitions look a bit incomplete versus the circuit diagram versions. Are those from the owners manual, if so for which year? What's a WIV?

 

For example, in (at least some of) the wiring diagrams fuse 21 is shown as being for the following (not necessarily all of these things are fitted to any given Yeti). 

"Reversing light switch -F4- , Air mass meter -G70- , Oil level and oil
temperature sender -G266- , High pressure sender -G65- , Air
quality sensor -G238- , Fresh air blower relay -J13- , Heater control
unit -J162- , Automatic anti-dazzle interior mirror -Y7- , Voltage
transformer, 12 V/5 V -A25- , mobile telephone pre-installation"

 

It's much clearer from those definitions why the OP's symptoms are likely to be power related.

 

59 minutes ago, Wino said:

Are those from the owners manual, if so for which year?

Yes, 2015.

 

EDIT: that is the only entry in the owners manual for WIV!

Edited 11 November, 20196 yr by Urrell

No need to close the thread, it’ll just sit there waiting for the next time fuse 21 blows!

6 hours ago, Urrell said:

 

EDIT: that is the only entry in the owners manual for WIV!

 

After doing a google, it seems that many  Skoda models have documents that make reference to WIV, and those that do have WIV fitted for example on a Fabia appear to have more engine sensors (eg oil temp) and a better dash display. I have found one possible answer on a German forum and that states "WIV = maintenance interval extension" - which I presume means "variable service intervals"?

8 hours ago, muddyjim said:

 

After doing a google, it seems that many  Skoda models have documents that make reference to WIV, and those that do have WIV fitted for example on a Fabia appear to have more engine sensors (eg oil temp) and a better dash display. I have found one possible answer on a German forum and that states "WIV = maintenance interval extension" - which I presume means "variable service intervals"?

WartungsInterVall, (Google translate's version of maintenance interval into German) I guess makes sense. Maybe shorthand for "oil level and temperature sensor" which usually only gets fitted to cars that can be set  to variable servicing.

 

I wonder if - with a similar level of fail - the 'tail lamp' listed in the owners manual for fuse 21 actually refers to the reversing light switch feed? Must do, I think.

Edited 12 November, 20196 yr by Wino