Upgrading the Fuses

[MikeD]

Hi

I am new to the forum as a member but I have been lurking for a while, learning lots.

In the Battery Charging Thread there was a picture of an engine bay with an 8-way Blade Fuse box, which is something I am thinking of doing this winter. I already have some in-line ones for overdrive, fuel pump and the light relays but would like to split out some of the circuits and move over to blades.

I had a play around with a 6-way using wired jumpers between the terminals but have not fitted it yet. To be honest it all looked a bit tight, that 8 ways looked a lot neater and has split out some of the circuits. I have still to work out the best way of doing that.

I have a permanently live fused 4-way box next to the existing fuse box which feeds the light relays and is handy for the timing light.

Has anyone got a wiring diagram/advice on how to proceed? I am very wary of chopping the loom, but suspect I will have to for this. I have Astley’s Electrical Systems book but not the ‘B’ specific one - might that help?

Thanks

Mike

[ChargedAutoGT]

google
advanced autowire mgb
fior some great schematics that many folks use.
G

[Bumpa]

That is my red roadster in the picture you mention. I have not chopped any of the wires in the new wiring harness I bought, but that does lead to a bit of over-crowding at the fusebox. If you look at the existing fusebox you will see that some inputs are joined together, and I have done that with the 8-way box. I soldered links between inputs 1 and 2, 3 and 4, and all four terminals 5 to 8 are linked together as well. This allows you to keep the original wires on the input side, that is the red/green from the light switch serving 1 & 2, the white from the ignition switch serving 3 & 4, and the two browns from the alternator serving 5 to 8.

The main issue is that the output side only has single terminals for each fuse. I got round this by using this type of piggy back connector https://www.vehiclewiringproducts.co.uk ... e-3-into-1 The blades on the connector can be bent to make best fit and any spare blades can be cut off. It gets a little crowded on the output side but I got them all connected and there haven't been any problems.

Here is a little diagram I put together when I was contemplating this job. Any questions, don't hesitate to ask.

Mike

[MikeD]

Thanks, that is just the sort of thing I am after., Plenty to think about for this winter

Mike