1999 FORD F250 sensor

Several air bag system components get hot after inflation. Do not
touch them after inflation.
If the air bag is inflated,the air bag will not function again
and must be replaced immediately.If the air bag is not
replaced, the unrepaired area will increase the risk of injury in a
collision.
The SRS consists of:
•driver and passenger (if equipped) air bag modules (which include the
inflators and air bags),
•one or more impact and safing sensors,
•a readiness light and tone
•and the electrical wiring which connects the components.
The diagnostic module monitors its own internal circuits and the
supplemental air bag electrical system warning (including the impact
sensors), the system wiring, the air bag system readiness light, the air
bag back up power and the air bag ignitors.
Determining if the system is operational
The SRS uses a readiness light in the instrument cluster or a tone to
indicate the condition of the system. Refer to theAir bag readiness
section in theInstrumentationchapter. Routine maintenance of the air
bag is not required.
A difficulty with the system is indicated by one or more of the following:
•The readiness light will either
flash or stay lit.
•The readiness light will not
illuminate immediately after
ignition is turned on.
•A series of five beeps will be heard. The tone pattern will repeat
periodically until the problem and light are repaired.
If any of these things happen, even intermittently, have the SRS serviced
at your dealership or by a qualified technician immediately. Unless
serviced, the system may not function properly in the event of a
collision.
Seating and safety restraints
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The high-current fuses and relays are coded as follows.
Fuse/Relay
LocationFuse Amp
RatingDescription
1 7.5A * Trailer Tow Left Stop/Turn Lamp
2 10A* Air Bag Module
3 7.5A* Trailer Tow Right Stop/Turn Lamp
4 20A* Trailer Tow Backup Lamps, Trailer Tow
Park Lamps
5 20A*
(Gasoline
only)
5A* (Diesel
only)Gasoline only-PCM, Two Speed Fuel Pump
Relay Coil, Fuel Pump Relay Coil, Mass Air
Flow Sensor, Fuel Injectors
Diesel only-Dual AlternatorAField
6-
(Gasoline
only)
10A*(Diesel
only)Gasoline only-Not Used
Diesel only-Single or Dual AlternatorA
Field, Regulator
19 29
18 2830
31
32
33
34
35
37 36 17 27
16 26
15 25
14 24
13
11 12
910
78
56
34
1223
22
21
20
Roadside emergencies
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Fuse/Relay
LocationFuse Amp
RatingDescription
7 20A*
(Gasoline
only)
5A* (Diesel
only)Gasoline only-Vapor Managment Valve,
HEGO Sensors, Intake Manifold
Communication Control, EVR Solenoid,
PCM, Canister Vent Solenoid
Diesel only-Dual AlternatorAField
8 15A* Trailer Tow Electronic Brake Illumination,
Park Lamps, Trailer Tow Park Lamp Relay
Coil
9 10A* Left Headlamp
10 25A* Power Point
11 10A* Right Headlamp (Low Beam)
12 10A* Daytime Running Lamps (DRL) Resistor
13 30A** Multi-function Switch, Headlamps
14 60A** Anti-Lock Brake System
15 30A** Windshield Wiper Motor
16 30A** Trailer Tow Battery Charge
17 30A** Electronic Shift On The Fly Relay, Transfer
Case Shift Motor
18 30A** Power Seat
19 20A** Fuel Pump Motor, PCM
20 50A** Ignition Switch (B4 & B5)
21 50A** Ignition Switch (B1 & B3)
22 50A** Instrument Panel Junction Box
23 40A** Blower Motor
24 30A** Power Distribution Box
25 30A*** Power Windows
26 20A** If equipped with Remote Keyless
Entry-Driver Door Unlock Relay Coil, All
Door Unlock Relay Coil, All Door Lock
Relay Coil, Park Lamp Flash Relay, If not
equipped with Remote Keyless
Entry-Power Door Lock Motors
Roadside emergencies
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