Golf L4-1588cc 1.6L DSL SOHC Turbo (1985)
Glow Plug: Description and Operation
The four glow plugs are small heating elements, one for each cylinder, mounted in the cylinder head with the tips projecting into the combustion
pre-chambers. The glow plugs assist combustion during cold starts by providing additional heat for ignition. Voltage to the bus bar connecting the
glow plugs is supplied by the glow plug relay whenever the ignition key is turned on. The glow plug relay is located on the fuse/ relay panel. An
indicator light on the instrument cluster signals that the system is operating, and also indicates when the engine is ready to start when it goes out. The
length of time that the system operates and the indicator remains lit is controlled by an engine temperature sensor. Above a certain temperature, the
system does not operate.