sensor FORD E150 1999 Owners Manual

The safety belt pretensioner uses the same crash sensor system as the
air bag supplemental restraint system (SRS). When the safety belt
pretensioner deploys, webbing from the lap and shoulder safety belt is
tightened.
Front safety belt height adjustment
Your vehicle has safety belt height
adjustments for the driver and front
passenger. Adjust the height of the
shoulder belt so the belt rests
across the middle of your shoulder.
To lower the shoulder belt height,
push the button and slide the height
control down. To raise the height of
the shoulder belt, slide the height
adjuster up. Pull down on the height
adjustment assembly to make sure it
is locked in place.
Position the shoulder belt height adjuster so that the belt rests
across the middle of your shoulder. Failure to adjust the safety
belt properly could reduce the effectiveness of the safety belt and
increase the risk of injury in a collision.
Lap belts
Adjusting the lap belt
The lap belt does not adjust automatically.
The lap belts should fit snugly and as low as possible around the
hips, not around the waist.
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80

How does the air bag supplemental restraint system work?
The air bag SRS is designed to
activate when the vehicle sustains
sufficient longitudinal deceleration
sufficient to cause the sensors to
close an electrical circuit that
initiates air bag inflation.
The fact that the air bags did not
inflate in a collision does not mean
that something is wrong with the
system. Rather, it means the forces
were not of the type sufficient to
cause activation. Air bags are designed to inflate in frontal and
near-frontal collisions, not rollover, side-impact, or rear-impacts.
The air bags inflate and deflate
rapidly upon activation. After air bag
deployment, it is normal to notice a
smoke-like, powdery residue or
smell the burnt propellant. This may
consist of cornstarch, talcum
powder (to lubricate the bag) or
sodium compounds (e.g., baking
soda) that result from the
combustion process that inflates the
air bag. Small amounts of sodium
hydroxide may be present which
may irritate the skin and eyes, but
none of the residue is toxic.
While the system is designed to help
reduce serious injuries, it may also
cause minor burns, abrasions, swelling or temporary hearing loss.
Because air bags must inflate rapidly and with considerable force, there
is the risk of death or serious injuries such as fractures, facial and eye
injuries or internal injuries, particularly to occupants who are not
properly restrained or are otherwise out of position at the time of air bag
deployment. Thus, it is extremely important that occupants be properly
restrained as far away from the air bag module as possible while
maintaining vehicle control.
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85

Several air bag system components get hot after inflation. Do not
touch them after inflation.
If the air bag is deployed,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:
²driver and passenger air bag modules (which include the inflators and
air bags),
²one or more impact and safing sensors,
²a readiness light and tone
²and 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:
²The readiness light will either
flash or stay lit.
²The readiness light will not
illuminate immediately after
ignition is turned on.
²A 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.
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86

Fuse/Relay
LocationFuse Amp
RatingDescription
8 30A Radio Capacitor(s), Ignition Coil, PCM
Diode, PCM Power Relay, Fuel Heater,
Glow Plug Relay (Diesel Only)
9 30A Wiper Control Module, Windshield Wiper
Motor
10 20A Main Light Switch, (External Lamps)
Multi-Function Switch (Flash-to-pass)
11 15A Brake Pressure Switch, Multi-Function
Switch (Hazards), RABS, Brake Pedal
Position Switch
12 15A Transmission Range (TR) Sensor, Auxiliary
Battery Relay
13 15A Blend Door Actuator, Function Selector
Switch
14 5A Instrument Cluster (Air Bag and Charge
Indicator)
15 5A Trailer Battery Charge Relay
16 30A Power Seats
17 Ð Not Used
18 Ð Not Used
19 10A Air Bag Diagnostic Monitor
20 5A Overdrive Cancel Switch
21 30A Power Windows*
22 15A Memory Power Radio
23 20A Cigar Lighter, Data Link Connector (DLC)
24 5A Illuminated Entry Module
25 10A Left Headlamp (Low Beam)
26 Ð Not Used
27 5A Radio
28 25A Power Plug
29 Ð Not Used
30 15A Headlamps (High Beam Indicator), DRL10A
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128

Fuse/Relay
LocationFuse Amp
RatingDescription
31 10A Right Headlamp (Low Beam), DRL
32 Ð Not Used
33 Ð Not Used
34 10A Transmission Range (TR) Sensor
35 Ð Not Used
36 5A (Cluster, A/C, Illumination, Radio), Steering
Column Assembly
37 Ð Not Used
38 10A Air Bag Diagnostic Monitor
39 Ð Not Used
40 30A Modified Vehicle
41 30A Modified Vehicle
42 Ð Not Used
43 20A C.B. Power Windows*
44 Ð Not Used
* Either fuse 21 or circuit breaker 43 will be present for power
windows.
Power distribution box
The power distribution box is located in the engine compartment. The
power distribution box contains high-current fuses that protect your
vehicle's main electrical systems from overloads.
Always disconnect the battery before servicing high current
fuses.
Always replace the cover to the Power Distribution Box before
reconnecting the battery or refilling fluid reservoirs.
Roadside emergencies
129