Cabin wiring - Toyota Starlet factory loom

When installing the Toyota Starlet cabin wiring loom into the Mini, the main issue I had to deal with was the relocation of the instrument cluster to the centre of the dash. I had to find a mounting location for the cabin fuse box where I didn't have to extend the large number of wires for the instrument cluster. Fortunately by mounting the fuse box above the accelerator pedal with a few simple brackets, there wasn't too many wires I had to extend but it was still a mess with organising the wiring routes.

Once the cabin fuse box was mounted, I plugged in the cabin wiring loom into the power distribution box (glovebox area) and then it was the long task of routing all the wiring and connectors to their known locations, grouping wires into sections (see photo below) and shortening/lengthening and crimping wires where necessary.

Groups of wires were taped up to keep it tidy while completing this task. This will look even neater once final wrapping is done.

All cabin wiring has a single ground point (terminal bolted to a rivnut)

During a recent sale, I purchased a single DIN JVC head unit for the Mini. I like this unit as it's a simple and clean design as opposed to a lot of head units which seem to have an overuse of buttons and eclectic fascia designs. It also has a 3" LCD screen with an input for a reverse camera. 

The JVC head unit uses standard ISO connectors. Cutting off the Toyota-specific radio connector and wiring in two ISO connectors (black one for power connections, brown one for speakers) to the standard power and speaker wires was simple. I also had to extend a factory Starlet wire to get the reverse signal for the reverse camera. If I ever have to change the stereo head unit, at least I have standard wiring connectors in place.


There is a separate section of the Toyota Starlet wiring loom for the rear of the car - for park/brake/reverse lights, indicators, fuel pump and fuel level signal (other wires/functions which I'm not using in the Mini like demister, wiper, electronic suspension have been removed from the loom). The Toyota Starlet front cut that I used for the project came with the first ~300mm of the rear wiring loom so I sourced a few more metres of wire that matched each of the factory wire and trace colours, crimped each wire and extended the loom length by approx 2.5m

In addition to the Starlet wiring, I added several wires to the rear wiring loom :
1) (Constant) power wire for a boot light
2) Signal ground wire for fuel level sender

3) Reverse camera power & RCA video cable

The rear wiring loom normally runs down the side of the door sill of the Starlet. In the Mini however, the loom will start under the heater and be routed under the centre console, along the exhaust hump, under the rear seat and then into the boot. I won't actually terminate any of this rear wiring loom (crimp connectors on) in the boot until final assembly of the Mini.

For now, that's the factory wiring installed but I still have to add new wiring for :
Power windows
Central locking

Multi-gauge display
Wideband oxygen sensor module
USB charging outlets