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Electrical Component Locator: Switches

SWITCHES LOCATION

Component Location
A/C Clutch Cycling Press. Switch On A/C accumulator.
A/C High Pressure Cut-Out Switch On rear of A/C compressor.
Aux. Cooling Fan Press. Switch On right rear of cylinder head, above starter.
Backup Light Switch (A/T) At base of steering column.
Brake Pressure Warning Switch On proportioning valve, at left frame rail.
Brake/Transmission Shift Interlock Switch ("G" Series) On lower steering column.
Coolant Temp. Cut-Out Switch In thermostat housing.
Fast Idle Temp. Switch (Diesel) On right rear cylinder head.
Flow Switch Near power steering pump.
Fuel Pump/Oil Press. Switch
"G" Series 4.3L (VIN Z) On top rear of engine, near distributor. See Figure.
"P" Series 4.3L (VIN Z - A/T) On top rear of engine, near distributor. See Figure.
"P" Series 4.3L (VIN Z - M/T) On top rear of engine, near distributor. See Figure.
"G" Series 5.0L (VIN H) & 5.7L (VIN K) On top rear of engine, near distributor. See Figure.
"P" Series 5.7L (VIN K - A/T) On top rear of engine, near distributor. See Figure.
"P" Series 5.7L (VIN K - M/T) On top rear of engine, near distributor. See Figure.
"G" Series 5.7L (VIN K) On top rear of engine, near distributor. See Figure.
"G" Series 7.4L (VIN N) On lower left front of engine. See Figure.
"G" Series 7.4L (VIN N) On lower left front of engine. See Figure.
"P" Series 7.4L (VIN N) On top rear of engine, near distributor.
Hydro-Boost Pressure Warning Switch On brake master cylinder.
Oil Pressure Switch (Diesel) On left rear of engine. See Figure.
Parking Brake Warning Switch On parking brake pedal support.
Seatbelt Warning Switch On driver's seat belt buckle.