I need the service manual for Volvo 960

SOURCE: repair central locking on bmw 318i

you can take the fuse out from under ther bonnet and open and close the doors manually(boot may not open though), the fault is with one of the locking mechenisms in any door

SOURCE: how to change spark plugs in a '96 Volvo 960

Remove the torx 30 screws that hold the plastic cover on the top of the engine,then you will find 10mm bolts holding coils to cyl head,remove bolts,lift coils out of spark plug holes,remove and replace spark plugs

SOURCE: please help me time volvo 960 engine

odonda: you may have inherited a can of worms: I'll do my best to help.
First, this is an interference fit engine. If the timing is off and the engine has been turned over, the upper end is "SCRAP"!
Ready? On each cam gear, is a line or scribe machined at the very outer edge of the gear. If you look at the back half of the timing cover there should be a portion which projects down toward the bottom of the engine. It will drop about an inch or so down before ending and just leveling out and running parallel to the top. Look closely, there are notches cut into the bottom corners. If you rotate the cams until the notches line up with the scribe marks, the scribe mark as you face the cams will be at 2.30 PM and the scribe to your right will be at 10:30 AM (hopefully the alignment marks on the cover had not been broken off.
Below, there is a mark on the oil pump housing which needs to be lined up with the timing mark on the crank.
I am making the assumption that your statement of being a technician should give way to your being aware of the pitfalls of rotating the cam gears and/or crank without extreme caution. There is a procedure to position the crank in order to set the cams and then go back to set the crank. Also the tensioner must be compressed to where you can pin it. The tension on the belt can be confirmed by taking the belt between thumb and forefinger at the longest span on the tensioner side. You should not be able to twist the belt more than 45 degrees.
As I said, A mistake on this engine can be a costly one. If you are not familiar with it and are not confident, swallow your pride, shine the job on rather than risk eating the consequences.
Good luck.