1999 DODGE RAM Service Repair Manual

Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware not
functioning ............ A ... Require repair or replacement
of hardware.
Binding, affecting
performance ............ A .. Require repair or replacement.
Binding, not affecting
performance ............ 2 .. Suggest repair or replacement.
Broken .................. A .. Require repair or replacement.
Burned, affecting
performance ............ A ........... (1) Require repair or
replacement.
Burned, not affecting
performance ............ 2 ........... ( 1) Suggest repair or
replacement.
Cracked, affecting
performance ............ A .. Require repair or replacement.
Cracked, not affecting
performance ............ 1 .. Suggest repair or replacement.
Float saturated ......... A ............ Require replacement.
Leaking ................. A .. Require repair or replacement.
Malfunctioning .......... A ........... ( 2) Require repair or
replacement.
Melted, affecting
performance ............ A ........... ( 1) Require repair or
replacement.
Melted, not affecting
performance ............ 2 ........... ( 1) Suggest repair or
replacement.
Missing ................. C ............ Require replacement.
Out of adjustment ....... B .. Require repair or replacement.
Terminal broken ......... A .. Require repair or replacement.
Terminal burned, affecting
performance ............ A ........... ( 1) Require repair or
replacement.
Terminal burned, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal corroded,
affecting performance .. A .. Require repair or replacement.
Terminal corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal loose, affecting
performance ............ B .. Require repair or replacement.
Terminal loose, not
affecting performance .. 1 .. Suggest repair or replacement.
Won't return ............ A .. Require repair or replacement.
Worn .................... 1 ............ Suggest replacement.
( 1) - Determine cause and correct prior to repair or
replacement of part.
( 2) - Includes inoperative, intermittent operation, or failure to
perform all functions.









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TIRES
Consult the vehicle owner's manual or vehicle placard for
correct size, speed ratings, and inflation pressure of the original
tires.
TIRE INSPECTION

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Condition Code Procedure
Tire diameter incorrect,
affecting ABS or TCS ... A ............ Require replacement.
Tire pressure incorrect,
affecting ABS or TCS ... A .. Require repair or replacement.
Tire size incorrect,
affecting ABS or TCS ... A ............ Require replacement.









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TOOTHED RINGS (TONE WHEEL)
NOTE: Copied from Drivetrain UIGs.
If the toothed ring requires replacement and cannot be
replaced as a separate component, replace the assembly of which the
ring is a part.
TOOTHED RING INSPECTION









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Condition Code Procedure
Alignment incorrect ..... B ............... Require repair or
replacement.
Bent .................... B ............ Require replacement.
Contaminated, affecting
performance ............. A ........ Require repair. Identify
and correct cause.
Cracked ................. B ............ Require replacement.
Loose ................... A ............. Require replacement
of worn parts.
Missing ................. C ............ Require replacement.
Number of teeth
incorrect .............. B ............ Require replacement.
Teeth broken ............ A ............ Require replacement.
Teeth damaged, affecting
performance ............ A ............ Require replacement.









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VACUUM BOOSTERS
VACUUM BOOSTER INSPECTION








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Condition Code Procedure
Applies too much assist
(oversensitive) ........ A ............ Require replacement.
Attaching hardware
broken ................. A ... Require repair or replacement
of hardware.
Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware not
functioning ............ A ... Require repair or replacement
of hardware.
Auxiliary vacuum pump
inoperative ............ A ........... ( 1) Require repair or
replacement.
Check valve grommet
deteriorated, affecting
performance ............ A .. Require replacement of grommet.

Check valve grommet
deteriorated, not
affecting performance .. 1 . Suggest replacement of grommet.
Check valve inoperative . A ........... (2) Require repair or
replacement.
Check valve leaking ..... A .... Require replacement of check
valve.
Check valve missing ..... C .... Require replacement of check
valve.
Check valve noisy ....... 2 ............ Suggest replacement.
Connector broken ........ A .. Require repair or replacement.
Connector (Weatherpack
type) leaking .......... A .. Require repair or replacement.
Connector melted ........ A ........ ( 3) Require replacement.
Connector missing ....... C ............ Require replacement.
Leaking ................. A ............ Require replacement.
Terminal burned, affecting
performance ............ A ........... ( 3) Require repair or
replacement.
Terminal burned, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal corroded,
affecting performance .. A .. Require repair or replacement.
Terminal corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal loose, affecting
performance ............ B .. Require repair or replacement.
Terminal loose, not
affecting performance .. 1 .. Suggest repair or replacement.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.
Vacuum hose filter
leaking ................ A .. Require replacement of filter.
Vacuum hose filter
restricted ............. A .. Require replacement of filter.
Wire lead burned ........ A .. Require repair or replacement.
Wire lead conductors
exposed ................ B .. Require repair or replacement.
Wire lead open .......... A .. Require repair or replacement.
Wire lead shorted ....... A .. Require repair or replacement.
( 1) - Inoperative includes intermittent operation or out of
OEM specification.
( 2) - Inoperative includes intermittent operation.
( 3) - Determine cause and correct prior to replacement of part.









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VACUUM HOSES
See HOSES.
VALVES
VALVE INSPECTION








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Condition Code Procedure
Attaching hardware
broken ................. A ... Require repair or replacement
of hardware.
Attaching hardware
missing ................ C .......... Require replacement of

hardware.
Attaching hardware
not functioning ........ A ... Require repair or replacement
of hardware.
Leaking ................. B .. Require repair or replacement.
Linkage bent (rear
load valves) ........... A ... Require repair or replacement
of linkage.
Linkage broken (rear
load valves) ........... A ... Require repair or replacement
of linkage.
Linkage disconnected
(rear load valves) ..... C ... Require repair or replacement
of linkage.
Pressure out of
specification .......... B ...... Require adjustment. If not
possible, require replacement.
Seized .................. A ............ Require replacement.
Sticking ................ A .. Require repair or replacement.
Terminal burned,
affecting performance .. A ........... (1) Require repair or
replacement.
Terminal burned, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal corroded,
affecting performance .. A .. Require repair or replacement.
Terminal corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal loose, affecting
performance ............ B .. Require repair or replacement.
Terminal loose, not
affecting performance .. 1 .. Suggest repair or replacement.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.
Wire lead burned ........ A .. Require repair or replacement.
Wire lead conductors
exposed ................ B .. Require repair or replacement.
Wire lead open .......... A .. Require repair or replacement.
Wire lead shorted ....... A .. Require repair or replacement.
( 1) - Determine cause and correct prior to repair or replacement
of part.









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WHEEL ATTACHING HARDWARE
For conditions noted below, also check condition of wheel
stud holes.
CAUTION: Proper lug nut torque is essential. Follow manufacturer's
torque specifications and tightening sequence. DO NOT
lubricate threads unless specified by the vehicle
manufacturer.
WHEEL ATTACHING HARDWARE INSPECTION









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Condition Code Procedure
Bent .................... A ............ Require replacement.
Broken .................. A ........ ( 1) Require replacement.
Loose ................... B ... Require repair or replacement
of affected component.

Lug nut flats rounded ... A ..... Require replacement of nut.
Lug nut installed
backward ............... B ................. Require repair.
Lug nut mating surface
dished ................. A ..... Require replacement of nut.
Lug nut mating type
incorrect .............. B ..... Require replacement of nut.
Lug nut seized .......... A ...... Require replacement of nut
and/or stud.
Stud incorrect .......... B .... Require replacement of stud.
Threads damaged ......... A ... Require repair or replacement
of component with damaged
threads.
Threads stripped (threads
missing) ............... A .......... Require replacement of
component with stripped
threads.
(1) - Some manufacturers require replacement of all studs on
any wheel if two or more studs or nuts on the same wheel
are broken or missing.









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WHEEL BEARINGS, RACES AND SEALS
NOTE: Grease seal replacement is required if seal is removed.
You are not required to replace these components in axle
sets. Determine the need to replace based upon the
individual component conditions that follow.
WHEEL BEARINGS, RACES AND SEALS INSPECTION









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Condition Code Procedure
Axle seal on drive axle
leaking ................ A . Require replacement of seal and
inspection of axle, bearing,
housing, and vent tube.
Bearing end-play exceeds
specifications ......... B .. Require adjustment of bearing,
if possible. If proper
adjustment cannot be obtained,
require replacement of bearing
assembly.
Bearing rollers, balls or
races are worn, pitted, or
feel rough when rotated as
an assembly ............ B .. Require replacement of bearing
assembly.
Seal leaking ............ A ...... ( 1) Require replacement of
seal and inspection of bearings.
Spindle worn ............ B .. Require replacement of spindle
and bearings.
( 1) - Require inspection of mating and sealing surface and
repair or replace as necessary. Check vent. A plugged
vent may force fluid past the seal.









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WHEEL CYLINDERS
You are not required to replace or rebuild wheel cylinders in
axle sets. However, when rebuilding or replacing a wheel cylinder due

to the conditions that follow, you may suggest rebuilding or
replacement of the other wheel cylinder (on the same axle) for
preventive maintenance, for example, the part is close to the end of
its useful life.
Determine the need to rebuild or replace based upon the
individual wheel cylinder conditions that follow.
WHEEL CYLINDER INSPECTION









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Condition Code Procedure
Attaching hardware bent . B ..... Require replacement of bent
parts.
Attaching hardware
broken ................. A ... Require repair or replacement
of hardware.
Attaching hardware
corroded, affecting
structural integrity ... A . Require replacement of corroded
parts.
Attaching hardware
loose .................. A .. Require repair or replacement.
Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware not
functioning ............ A ... Require repair or replacement
of hardware.
Bleeder port damaged (if
non-repairable) ........ A ............ Require replacement.
Bleeder screw broken off
in wheel cylinder (if non-
repairable) ............ A ........ (1) Require replacement.
Bleeder screw plugged ... A ........... ( 1) Require repair or
replacement of bleeder screw.
Bleeder screw seized .... A ........ ( 2) Require replacement.
Bore corroded (pitted) .. B ............ Require replacement.
Bore grooved ............ A ............ Require replacement.
Bore oversized .......... B ............ Require replacement.
Dust boot missing ....... C ..... Require replacement of dust
boot.
Dust boot torn .......... A . ( 3) Require replacement of dust
boot.
Leaking ................. A ....... ( 4) Require rebuilding or
replacement.
Piston corroded, affecting
performance ............ B ... Require replacement of piston
and rebuilding or replacement
of wheel cylinder.
Piston finish worn off .. B ... Require replacement of piston
and rebuilding or replacement
of wheel cylinder.
Piston stuck in bore .... A .... Require replacement of wheel
cylinder.
Loose ................... B .. Require repair or replacement.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.
( 1) - Only required if the hydraulic system must be opened.
( 2) - Seized is defined as bleeder screw that cannot be removed
after a practical attempt at removing. Only required if
the hydraulic system must be opened.

(3) - Inspect for conditions related to wheel cylinder.
( 4) - Leaking is defined as a drop or more. Dampness is normal.









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WIRING HARNESSES
NOTE: Copied from Electrical UIGs.
WIRING HARNESS INSPECTION









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Condition Code Procedure
Application incorrect ... B .. Require repair or replacement.
Attaching hardware
broken ................. A ... Require repair or replacement
of hardware.
Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware not
functioning ............ A ... Require repair or replacement
of hardware.
Connector broken ........ A .. Require repair or replacement.
Connector (Weatherpack
type) leaking .......... A .. Require repair or replacement.
Connector melted ........ A ........... ( 1) Require repair or
replacement.
Connector missing ....... C ............ Require replacement.
Insulation damaged,
conductors exposed ..... A .. Require repair or replacement.
Insulation damaged,
conductors not exposed . 1 ............ Suggest replacement.
Open .................... A .. Require repair or replacement.
Protective shield
(conduit) melted ....... 2 ........... ( 1) Suggest repair or
replacement.
Protective shield
(conduit) missing ...... 2 .. Suggest repair or replacement.
Resistance (voltage drop)
out of specification ... A .. Require repair or replacement.
Routed incorrectly ...... B ................. Require repair.
Secured incorrectly ..... B ................. Require repair.
Shorted ................. A .. Require repair or replacement.
Terminal broken ......... A .. Require repair or replacement.
Terminal burned, affecting
performance ............ A ........... ( 1) Require repair or
replacement.
Terminal burned, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal corroded,
affecting performance .. A .. Require repair or replacement.
Terminal corroded, not
affecting performance .. 2 .. Suggest repair or replacement.
Terminal loose, affecting
performance ............ B .. Require repair or replacement.
Terminal loose, not
affecting performance .. 1 .. Suggest repair or replacement.
Voltage drop out of
specification .......... A .. Require repair or replacement.
( 1) - Determine cause and correct prior to repair or
replacement of part.









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BRAK E S YSTE M
1999 D odge P ic ku p R 1500
1998-99 BRAKES
CHRY - Disc & Drum - Trucks & Vans - Except FWD
Dakota, Ram Pickup, Ram Van
DESCRIPTION & OPERATION
All models are equipped with single-piston, sliding-caliper
front disc brakes with ventilated rotors. All models utilize self-
adjusting rear drum brakes. Rear Wheel Anti-Lock (RWAL) brake system
is standard on all models. Optional 4-wheel Anti-Lock (4WAL) brake
system is available on all models.
System also includes power brake booster, dual-reservoir
master cylinder and combination valve. Combination valve consists of
metering valve and pressure differential switch.
Models with diesel engine include a gear-driven vacuum pump.
Depending on speed of engine, pump produces 8-25 in. Hg. Models
without full-floating rear axle use 9", 10" or 11" single-anchor rear
brakes. Models with full-floating rear axle use 12" or 13" single-
anchor rear brakes.
NOTE: For information on Anti-Lock Brake Systems (ABS), see
appropriate ANTI-LOCK article.
BLEEDING BRAKE SYSTEM
BLEEDING PROCEDURES
Complete Brake System
Before bleeding system, exhaust all vacuum from power unit by
depressing brake pedal several times. Bleed master cylinder using
bleeder screws (if equipped). Bleed wheel cylinders and calipers in
sequence. See BLEEDING SEQUENCE table.
BLEEDING SEQUENCE









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Application Sequence
1999 Dakota & Ram Van .......... Master Cylinder, Combination Valve,
RR, LR, RF & LF
All Other Models ............... Master Cylinder, Combination Valve,
Rear Anti-Lock Valve, RR, LR, RF & LF









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Master Cylinder (Bench Bleeding)
1) Bench bleed master cylinder before installation. Place
master cylinder in soft-jaw vise. Install bleeder tubes in both
outlets of master cylinder. See Fig. 1.
2) Fill master cylinder with clean brake fluid. Ensure ends
of bleeder tubes are submerged in brake fluid.
3) Using a wood dowel, apply and release master cylinder
until no air bubbles exist in brake fluid flow. Leave bleeder tubes
installed on master cylinder during installation. Install master
cylinder. Remove bleeder tubes, and connect brakelines. Bleed brake
system if necessary.