J757 relay location

If you look in your owner's manual at the underhood electrical center that has the under hood fuses and relays, it should be labeled. If the above does not work, then go to www.alldatadiy.com and pay for a 1 car subscription and then look it up in the repair manual. I would start with a component search in the upper RH search box.

Have you got an owner's manual? Check here http://repairpal.com/automobile-owners-manuals-online or try this link you may be able to down load a free copy of the owner's manual for your vehicle http://www.autousermanual.com/