I wish I could help with this,however my three manuals do not cover your model with a engine picture.I suggest first go to your local Mazda dealer and ask the service desk or parts counter if they would make a copy from the dealers maintenance book if available.Second is go to a site like cardomain and do a search on a model year,engine like yours I would bet someone has some pictures of it(stock or modified).That is my only recommendation.
under dash right of steering column.
under the termostat housing.
usually next to the blinker fluid reservoir unless its turbo then its under the flux compasitor relay unit thingy
Browning B2000 shotguns in nice shape can be readily bought for under $500.
Clutch safety switch =- should be on the top of the clutch pedal under dash area Neutral safety switch could be at the lower end of the gearshift handle or at the side of the transmission
If the diagram decal is not under the hood, your best bet would be to visit your local library and find a reference specific to your vehicle. I don't think reference books are available for checkout, but you can make copies of the diagrams there.
On the '87 B2000 the fuel is under the hood, on the right wheel weld. It's white--fuel line comes in: goes out. If not there, look around the fuel tank. I have an '84 B2000 and the fuel filter is directly in front of the driver's side rear wheel above the frame rail as it curves upward towards the rear. It is a small white canister with in/out ports sitting in a wire holder. I looked under the hood along the left (driver's side) wheel well and it's not there on this model.
under the hood
It is directly below the carburetor on the passenger side.It is about the size of a tennis ball (actually smaller) and has three bolts metric in size,one vacumm line and one electrical plug going to it mounted at a angle.I suggest removing the whole air cleaner just for visibility it is literally under the carb.Hope this helps.If still not sure go to auto zone or advance autos websites and enter your info for your truck and enter egr in the parts search they should have a picture of the part.
Under the bonnet
Caption or plaque is another name for words under a picture.
The oxygen sensor on a b2500 Mazda is located in the exhaust. It is under the truck about even with the transmission.