Special vehicle battery not charging

[JMMT]

Hi. My special vehicle battery (in boot compartment) seems to be disconected from the charger. I measured both leisure batteries and this one is reading only 7 volts, even with the 220v charger on. Any thougts about solving this issue? Thank you for your help in advance

 

[WelshGas]

Hi. My special vehicle battery (in boot compartment) seems to be disconected from the charger. I measured both leisure batteries and this one is reading only 7 volts, even with the 220v charger on. Any thougts about solving this issue? Thank you for your help in advance

Have you checked the Cube Fuse on the +tve pole of the rear leisure battery?

 

[JMMT]

Have you checked the Cube Fuse on the +tve pole of the rear leisure battery?

Sorry about my ignorance, can you enlight me about that "Cube Fuse on the +tve pole"?

 

[WelshGas]

Sorry about my ignorance, can you enlight me about that "Cube Fuse on the +tve pole"?

White cube fuse.on the +tve Red pole rear leisure battery.

 

[JMMT]

White cube fuse.on the +tve Red pole rear leisure battery.

View attachment 145145

I've already checked the fuse; it's a 50 Amp fuse and it's blown. I'll try to find a new one. Is 50 Amp enough?

 

[WelshGas]

I've already checked the fuse; it's a 50 Amp fuse and it's blown. I'll try to find a new one. Is 50 Amp enough?

On my T5.1 it was 75 amps.

 

[JMMT]

On my T5.1 it was 75 amps.

Do you know how much current comes from the charger?

 

[WelshGas]

Do you know how much current comes from the charger?

The split charge relay feed from the engine alternator is fused at 80 amps. Brown fuse under passenger seat RHD. The EHU mains charger is 20 amps or so.

 

[JMMT]

The split charge relay feed from the engine alternator is fused at 80 amps. Brown fuse under passenger seat RHD. The EHU mains charger is 20 amps or so.

Thank you. I will try to find one fuse of 75 Amp for the rear leisure battery.

 

[vbk1975]

Thank you. I will try to find one fuse of 75 Amp for the rear leisure battery.

The fuse is sized for the cable, so i would recommend replacing the fuse like for like unless you know the cable in your van is the same CSA (Cross Sectional Area) and length as the vans that have 75A. I doubt this has blown through normal use, more likely at battery change or something has shorted.