E 350 Van V8-7.3L DSL Turbo VIN F (1995)
Glow Plug Relay: Description and Operation
DESCRIPTION
The glow plug control module has a plastic base and two mounting bolts. It is operated by the Powertrain Control Module (PCM) which senses
engine oil temperature, PCM voltage, and barometric pressure.
OPERATION
When the engine oil temperature or the barometric pressure is low, the PCM activates the glow plug control module and the intake manifold glow
plugs. If the PCM voltage is too high, the PCM deactivates the glow plug control module and the intake manifold glow plugs immediately energize
for a shorter duration, decreasing the modulation of the duty cycle.
