Hi,

I've removed both Fuse 43 from passenger fuse box and Fuse 15 from engine fuse box.

My question is what is the difference between the two fuses?

What do they operate?

As they both say 'Active exhaust' on the diagram
Thanks

 

AIUI, folks with the earlier MYs only removed F43. Later MYs don't have F43 so F15 had to go!

 

Thanks for the reply,

What is the difference between them?

I've removed both, should I replace 15?

Thanks

 

In the 2020 R Fuse 15 is the one to pull to disable the valves and keep them open all of the time. Not sure on Fuse 43.

 

F43 on the first few model years provides power to the active exhaust vacuum pump, which was deleted in later years. I have a remote relay which defeats this fuse, so I have either normal active exhaust, or valves open 100% of the time.

 

Same situation here both fuses 15 and 43 on MY 17 R awd…F15 states “active exhaust valve” and fuse 43 states “active exhaust”…. Which one to remove? Thx

 

Try both in various combinations and see what it does!

 

Hi jazzyfingers2,

Welcome to the Jaguar Forums! It's great to have you with us.

It's always helpful to state the year, model and engine details of your Jaguar since wiring and other details can vary from year to year. A good way to do this is to visit your User Control Panel and Edit Your Signature to add this information so it shows up in all of your posts.

You may be able to subscribe to the factory service documents, including the wiring schematics, at eautorepair.net (Mitchell1) or alldata.com, which should answer your questions about which circuits the various fuses serve.

Another source is Jaguar TOPIx, though it can be more challenging to use:

Jaguar TOPIx U.S.A.

Cheers,

Don

 

@jazzyfingers2 Curious- did you remove one fuse at a time or both fuses at the same time? How did it go? I too seem to have both fuses 15 and 43…thx pls let me know your experiences!

 

Fuse 15 is the one on the 2020R for the valves. I would start there.