bit of advice needed please

[Danm85]

So basicly i dont have a remote key so i have to use the drivers door lock to lock/unlock the car each time but recently the key has just been unlocking the drivers door and not the whole car (not a major problem) but been living with it. Now tho its got to the stage where the hazard light keep flashing randomly if the cars locked or unlocked, even uf the engine is started and car is drove hazards still flash, no alarm sounds and car drives as usual.
checked ccm box,wires and circuit board and all are bone dry and all wires seem unbroken and as original even the 4 into 1 black wire,but if i bang the outer ccm case the hazards stop flashing. Grrrrrrrr driving me mad. Whats your thoughts.
R reg b5 1.8t.