Factory fitted aux battery - fuses, blue connection

[fjord]

Hi, now on here and thanks to everyone putting on great info.

Picture is factor setup. Anyone know what the bank of three blue fuses are and more specifically the blue connector - the blue connector was disconnected when I got it. All three wires come off the battery and go down into floor - assume they are for the webasto.?!
I have had problem with agm battery overheating when on long drives but that could be unconnected.
Thanks

 

[Dellmassive]

possible trailer electrics?

(maybe diesel heater?)

 

[fjord]

Yes thanks, I agree, one of them is definitely to the heater as it’s powered by that battery. And maybe one is for a light at the back (actually I can check that) and maybe one for towbar system (it was a road works van) …..
what I can’t figure out is why one of the connectors is BLUE and all the others is RED a sn the blue one was let unconnected?

 

[fjord]

Ps Dellmassive the part that you have circled at the bottom of the picture is the relay.

 

[fjord]

This is the blue connector, sorry was not clear in first pic

 

[Skyliner33]

This is the blue connector, sorry was not clear in first pic

View attachment 175472

Those don't look factory to me.

 

[Deaky]

Those 3 blue fuses are 100% not factory. The heater is the 20a fuse in the other fuse box.

 

[fjord]

Ah right thanks Deaky. Found out one of them is small led flood/spot light in the back

 

[Sim60]

This is the blue connector, sorry was not clear in first pic

View attachment 175472

Colour coding is related to wire gauge ( and current rating) and hence which part of the crimp tool you use.
Red is 1.5mm?
Blue is 2.5
Yellow is 6??

 

[fjord]

Colour coding is related to wire gauge ( and current rating) and hence which part of the crimp tool you use.
Red is 1.5mm?
Blue is 2.5
Yellow is 6??

Thanks

 

[Insert Coin]

Those crimps are nasty, I’d be checking any other electrical work that’s been carried out.