wireing diagrams needed for starter&alternator 2.5n/a

[taylorslandy1972]

Hi everyone, all new to this forum, I've just recently installed a 2.5n/a into my series 3, totally lost on how I wire the starter/alternator and which wires go where onto the ignition barrel as I've just had to replace barrel aswell. Many thanks Andy

[FridgeFreezer]

This might help - alt & starter are fairly universal jobbies:

[Snagger]

Put simply, extend the white wire with the red stripe that used to run to the solenoid mounted on the battery stand to the blade terminal on the new starter motor and run all the brown cables that connected to the battery to the stud terminal on the starter motor, along with a heavy battery lead. The alternator wiring doesn't change, though the terminals may, but the alternators can be swapped over if you want anyway.

Your biggest issues are the temperature sender, heater plugs and the fuel solenoid. The temp sender needs to be a SIII type, not the 90/110, otherwise it won't be compatible with the gauge and will always read in the cold arc. The fuel solenoid can be connected by an extension of the coil LT wire, if you had a petrol, or by running a new cable to the appropriate switch terminal using a petrol switch. The heater plugs run from 12V, so don't use the ballast resistor from a SIII diesel. You can either use the timer relay run with a direct battery feed and ign switch control as per a Defender or just fit a heavy duty switch on the dash, whichever you prefer.