Power Window Relay

The car power locks won't lock, it can unlock but not lock all the doors. The culprit is a relay sitting inside the driver's door - a black box the size of a cigarette box. Went to a car accessory shop - that's how I got to know of the problem but they don't have spares. Went to my usual mechanic and he suggested that I look for a used part myself from a motor cut-shop. This was the first time that I'd been to such place in Alor Star & managed to get a replacement part from a similar car-door lying at the back of the workshop at RM50.00. Replaced the thing myself and whoa! it works like new and that makes me feel good.