SC54 keeps popping

[Tweekaz]

Hi guys,

My aux heater display has been black for a couple of months now. Today i checked the fuses, and found SC54 to be popped (7,5amp). Replaced it, display woke up again. But as soon as i started the aux heater, it popped again. Tried to put a 10a, but that also popped right away.

Any suggestions?

T6 LWB 2.0TDIA74M 396.000km.

 

[Dellmassive]

Did it work previously?

Is it mounted underneath the vehicle?

Water ingress?. Corrosion?


Fyi.... It's a very bad idea to put a fuse in a circuit higher than it's rated for. (Ie 10A in 7.5A )


Got any pics?

Have you checked the fuse card in the download section to see what else is supplied by that fuse.

 

[Dellmassive]

Factory fit or aftermarket fit.?

 

[mmi]

SC54 feeds overhead control panel, remote control receiver and circulation pump V55 in/near by Webasto.

T6 - Auxiliary Coolant Heater Wiring Diagram

Aux Coolant Heater Circuit Diagram Covers aux heater and remote control receiver/preselection clock Please check the history/updates tab, first release is for early T6s manufactured from June 2015, second release is for vehicles manufactured...

www.t6forum.com

Note: the above is for vans build Nov-2017 onwards - before that the Webasto was powered from second battery (when installed) - shouldn't be relevant here.

 

[Tweekaz]

Factory fitted. I think it maybe the circulation pump (V55). Anybody know if that’s known to fail?

 

[Dellmassive]

@oldiebut goodie do you work with these units?

 

[mmi]

Page 10 etc >here<

 

[oldiebut goodie]

No sorry, Webasto air heaters only.