Usual story... my 306 xld Mreg 120000ish on clock was working fine, until a couple of days ago it went haywire, first thing to go was the clock,it kept reseting itself, as did the radio, i banged the dash and pressed every button in sight and noticed that the rear heated window button turned the clock and radio off, next day or so the central locking intermittently started to react in a "lazy way" as if the battery had low power, a few days after when i turned the key the starter motor didnt do its thing(no power to it) , so once again i hit the dash and pressed some buttons and when i pressed the rear heated window button the clock came on and hey presto the car started. now things have gone really downhill, i have no central locking, radio ,clock, horn, starter motor, or courtesy lights (however, the interior light works!?).
Ive checked all the fuses, relaysand changed the battery, also got the car to start by touching a piece of wire from the battery to the starter motor with the key in the second position . and since rigged up a temporary switch to start it, but now Im lost.
I dont think its the imobilser as the fuel cut off solonoid opens to allow the car to run, i would have expected that to stay shut but i may be wrong. Why would so many seemingly unconnected electrical items go wrong at the same time???
Please any suggestions no matter how simple or complex would be appreciated very much,