MGB Modern Electrical Boxes
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There are two electrical boxes to replace the original glass fuse box and relays with modern fuses and relays.
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Model information
- Source
- Printables
- Category
- Automotive
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
There are two electrical boxes to replace the original glass fuse box and relays. It adds individual fuses to each main circuit as well as additional relays to all the major loads.
There is a fair bit of wiring modifications involved but it is mostly inserted in between the wiring harness and doesn't involve running new wires.
The relays help a ton with voltage drop, brighter lights, louder horns, better cooling, and whole lot more reliable.
This was designed to fit a RB MGB ('79 specifically) so I can't guarantee an exact fit with earlier models.
I'd recommend these be printed with ABS or possibly PETG, the latches need some flex and engine bay temps could warp low-temp materials.
Electrical parts:
Aux fuse block: https://www.amazon.ca/gp/product/B000VU9D1G?ie=UTF8&psc=1
Aux terminal block: https://www.amazon.ca/gp/product/B013OAQV4G?ie=UTF8&psc=1
Main fuse blocks: https://www.summitracing.com/parts/PRF-30002
Relay ports: https://www.summitracing.com/parts/PRF-80133
Distribution blocks: https://www.amazon.ca/dp/B000OTJ89Q?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1