After a lot of search, I am able to find Hyundai Santro's workshop manual. It is for 2002 model, left hand driven Santro but Santros in Pakistan are not much different from it.
Here is the link to download;
http://www.4shared.com/file/p6ANfQAlce/Hyundai_Santro_2002_Shop_Manua.html
It is a CD iamge which you can directly burn on a CD or you can mount it using any image mounting software (I use MagicDisc)
Following is the PDF file which contains Wiring Diagrams and other electrical information taken from user manual
http://www.4shared.com/office/T5fQouRTba/Electrical__Wiring_general_inf.html
(links updated on 13-Aug-2015)