I have a 2005 TD5 Defender, which has been having various electrical issues. From starting problems, no fuel pump, windows don't work, and Air con not working. Have replaced multiple relays, and have a bag full of 8 that are now spares. On replacing relays, items would work for a short while...

I have a TD5 Defender, and when I tried to start it the other day, lights on dash came on, could hear fuel pump, but nothing from the starter motor when I tried to start. Have checked fuses, and relays, all seem fine. When I checked the small wire connection to the starter there was no power...