Roverlike

Be careful with Rover 25 because from 99/00 onwards all 16v non VVC engines used MJY100640 injectors.

Seller just provided info to which engine you can mount injectors he is selling, but not on which cars you will find injectors mounted from factory. So from my point of view you need to look on any cars prior to 1999 to find beige injectors mounted from factory.

Have you tried this seller: https://mglrparts.co.uk/products/injector-fuel-multi-point-injection-genuine-mg-rover-200-400-mgf-tf-mjy100430-austin-rover-group-mjy100430-mjy100430

95 -99/00 all 1.4 16v, 1.6, 1.8 and 1.8VVC used same injector MJY100430
Cream Band (143VVC) injectors: MEMS 2J

210 cc/min / 5 = 42



from 99/00 onwards 16v 1.8VVC used MJY100580
Blue (TF160) injectors: MEMS 3

190 cc/min / 5 = 38

Just a note, since RookyMGF have MG F and not MG TF, he has Lucas alarm system and squarish 2 button fobs. He does not have Pektron SCU of later MG TF.
However sorting door lock/s should be done as soon as possible.

Congratulations!

You can take a look at this thread https://www.the-t-bar.com/forum/roverlike-s-guides/97846-mg-f-tf-fuse-relay-listing where you can find position of indicator flasher for Lucas system or indicator relays (2 of them) for Pektron system.

As Airportable said if you have Pektron system (oval fob with logo in the middle) BCU unit operates thes two indicator relays and your best call would be to Paul @ https://www.technozen-electronics.co.uk/ since this well might be Pektron BCU problem.

Is this what are you after:

I hope you solved your problem. As I mentioned above same Brown/Pink wire provides power for many engine components. Lambda sensor is one of them. So if you had melted wires which could touch metal body or exhaust and by that ground itself, that would certanly blow your 30 Amps fuse.