The glow plug is the diesel version of a spark plug. There are 4 glow plugs (1 for each cyl.) located usually near the injector on top of the cylinder head.
The glow plug is NOT the diesel version of a spark plug, they both do different jobs. The glow plug is there to aid starting when the engine is cold. The spark plug is there to provide the spark for combustion to take place in a petrol/gasoline engine.
no glow plugs
Unless your ford focus is a diesel your car does not have glow plugs.
there are 8 glow plugs
wire diagram for 1999 Ford F250 diesel glow plug relay
there are 8
the glow plugs are located under the valvecovers should be 8 of them
The glow plug relay, on your 2004 Ford 6.0 liter diesel engine, can be found just below the fuse box. The fuse box can be found in the engine compartment.
they are under the valve covers
Do not touch them if you do not even know where they are located.
The #6 Glow plug is the third one from the front of the truck on the driver side.
8... there is one per cylinder
In my 1986 F350, I replaced a the 6.9 diesel engine with a 1989 7.3 diesel engine. Everything fit. BUT I had to used the glow plug system from the 6.9 system