Vectra SRi C alarm keeps going off code error fault

[Tapie]

57 plate. Alarm has randomly been going off, got a mate to check for a fault or error code and the following showed up. But we're not sure how to sort it without putting into a garage.

1. rear right door switch circuit open or high voltage
2. rear right door low current
3. power sounder datalink circuit low voltage no communication with alarm siren powersounder malfunction
4. Inadvertant load circuit low voltage or interior light cut off circuit malfunction or instrument dimming LED output circuit

Any ideas for fixing or will I have to drop it into a Vauxhall garage?

Also, are the alarm sensors on the doors, bonnet and rear visible? If so what should I be looking for and where are they? had a look but can't really see anything obvious.

[skinnybigc]

alright mate when u checked the fault descriptions is there any codes ?????
the door pin switches are built into the latches so u wont c them

[Tapie]

Nah, stupidly didn't write down the codes. But it's definitely issue with the rear right door lock as contacted Vauxhall and had it in for an inspection. Vauxhall have recommended that I get it replaced for supply/fit £148.

[Tapie]

Is the above a decent price?

Was thinking of just buying lock and fitting myself, seen a guide in the how to section anyone done that before or as usual is it best to leave to the pros?

Assuming this is what I would need to buy (I know that this one is wrong side)