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Ford Expedition 1998 Workshop Manual

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Download this manual See also: Workshop Manual, Owner's Manual
1998 Expedition/Navigator Workshop Manual
SECTION 415-00: Audio Entertainment System — General Information
DIAGNOSIS AND TESTING
Audio System
Refer to Wiring Diagrams Cell 130 (Expedition, Navigator), Radio for schematic and connector information.
Special Tool(s)
73 Digital Multimeter or equivalent
105-R0051
Inspection and Verification
1. Verify the customer concern by operating the electronic audio system with the engine running and the vehicle in and out of motion.
2. Visually inspect for obvious signs of mechanical and electrical damage; refer to the following chart:
Visual Inspection Chart
Radio chassis physically damaged, misaligned, any control(s) inoperative
Digital audio compact disc player physically damaged, misaligned, any control(s) inoperative
Antenna or antenna cable physically damaged, misaligned connection(s)
Radio speakers, mounting/speaker cones physically damaged, misaligned
Radio ignition interference capacitors, radio frequency interference suppression bond, and radio receiver good bonding strap misaligned, (also
check for cleanliness and metal-to-metal contact)
3. If the fault is not visually evident, determine the symptom and proceed to Symptom Chart.
Symptom Chart
Symptom Chart
Condition
The Radio/Tape Chassis Is Inoperative —
Does Not Operate Properly
Tape Player Only Inoperative — Does Not
Operate Properly
Radio Chassis Display Blank — Radio
Chassis Operates
Radio Chassis/Tape Player Display Blank —
Radio Chassis/Tape Player Operates
The CD Changer Is Inoperative — Does Not
Operate Properly
The CD Changer Display Is Blank — Does
Not Operate Properly
Noisy Reception
Noisy Reception — FM Only
Poor Quality/Distorted Sound From One or
More Speakers (Not All Speakers)
Poor Quality / Distorted Sound From All
Speakers
No Sound From One or More of the
Speakers — Not All Speakers
http://www.fordtechservice.dealerconnection.com/pubs/content/~WSWJ/~MUS~LEN/20/...
Mechanical
Possible Sources
Fuse(s).
GO to
Circuitry.
Radio chassis.
Radio chassis.
REMOVE the radio chassis and SEND it to an authorized Ford
audio system repair facility. TEST the system for normal
operation.
Radio chassis.
REMOVE the radio chassis and SEND it to an authorized Ford
audio system repair facility. TEST the system for normal
operation.
Radio chassis.
REMOVE the radio chassis and SEND it to an authorized Ford
audio system repair facility. TEST the system for normal
operation.
Fuse.
GO to
Circuitry.
Radio chassis.
Digital audio compact disc player
Ignition switch (11572).
Fuse.
GO to
Circuitry.
Radio chassis.
Digital audio compact disc player
Ignition switch.
Antenna.
GO to
Antenna connections.
Noise suppression equipment.
Radio chassis.
Connections at battery, antenna,
speaker leads, or radio receiver.
Antenna.
GO to
Antenna connections.
Noise suppression equipment.
Radio chassis.
Connections at battery, antenna,
speaker leads, or radio receiver.
Speaker(s).
GO to
Wiring to speaker(s).
Audio cable.
Radio chassis.
Radio amplifier (18B849).
Speaker(s).
GO to
Wiring to speaker(s).
Audio cable.
Radio chassis.
Radio amplifier.
Speaker(s).
GO to
Wiring to speaker(s).
Radio chassis.
Antenna system.
1998 Expedition/Navigator Workshop Manual
Procedure revision date: 02/11/2000
Action
Pinpoint Test
A.
Pinpoint Test
B.
Pinpoint Test
C.
Pinpoint Test
D.
Pinpoint Test
E.
Pinpoint Test
F.
Pinpoint Test
G.
Pinpoint Test
H.
Page 1 of 25
Electrical
Open fuse(s)
Open connector(s)
Corroded connector
(s)
Open or shorted
circuit(s)
8/30/2010

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Summary of Contents for Ford Expedition 1998

  • Page 1 Circuitry. Radio chassis. Tape Player Only Inoperative — Does Not Radio chassis. REMOVE the radio chassis and SEND it to an authorized Ford Operate Properly audio system repair facility. TEST the system for normal operation. Radio Chassis Display Blank — Radio Radio chassis.
  • Page 2 1998 Expedition/Navigator Workshop Manual Page 2 of 25 Radio amplifier. No Sound From All of the Speakers Radio chassis. GO to Pinpoint Test Audio cable. Radio amplifier. Loud Pops When Cycling The Ignition Switch Subwoofer enable line shorted. GO to Pinpoint Test Subwoofer.
  • Page 3 Measure the resistance between radio chassis C262-2, circuit 57 (BK), and ground. Is the resistance less than 5 ohms? REMOVE the radio chassis and SEND it to an authorized Ford audio system repair facility. TEST the system for normal operation.
  • Page 4 1998 Expedition/Navigator Workshop Manual Page 4 of 25 REPAIR circuit 57 (BK). TEST the system for normal operation. PINPOINT TEST B: THE CD CHANGER IS INOPERATIVE — DOES NOT OPERATE PROPERLY CONDITIONS DETAILS/RESULTS/ACTIONS B1 CHECK OPERATION OF THE CD CHANGER Turn on the radio.
  • Page 5 Measure the resistance between CD changer C334-3, circuit 694 (BK/LG), and ground. Is the resistance less than 5 ohms? REMOVE the CD changer and SEND it to an authorized Ford audio system repair facility. TEST the system for normal operation.
  • Page 6 Are the circuits and connectors OK? REMOVE the CD changer and SEND it to an authorized Ford audio system repair facility. TEST the system for normal operation. REPAIR the circuit(s) and/or connector(s) as required. TEST the system for normal operation.
  • Page 7 1998 Expedition/Navigator Workshop Manual Page 7 of 25 CLEAN and/or SECURE the antenna connections as required. TEST the system for normal operation. D3 CHECK SUPPRESSION EQUIPMENT Check all required suppression equipment, the radio frequency interference suppression bond, and the radio receiver hood bonding strap for security, cleanliness, and metal-to-metal contact.
  • Page 8 Verify the operation of the radio chassis. Is the noise eliminated? REMOVE the radio chassis and SEND it to an authorized Ford audio system repair facility. TEST the system for normal operation. REINSTALL the original radio chassis. GO to D13 SUBSTITUTE RADIO AMPLIFIER Substitute a known good radio amplifier.
  • Page 9 Is the noise eliminated? REMOVE the radio amplifier and SEND it to an authorized Ford audio system repair facility. TEST the system for normal operation. REINSTALL the original radio amplifier. USE a jumper cable to GROUND various parts of the vehicle to the frame (for example: engine, fenders, quarter panels, stone deflectors, engine air cleaner, body sheet metal).
  • Page 10 Verify the operation of the radio. Is the poor quality radio speaker operational? REMOVE the radio amplifier and SEND it to an authorized Ford audio system repair facility. TEST the system for normal operation. REMOVE the radio chassis and SEND it to an authorized Ford audio system repair facility. TEST the system for normal operation.
  • Page 11 Is the LH front radio speaker operating correctly? REMOVE the radio amplifier and SEND it to an authorized Ford audio system repair facility. TEST the system for normal operation. REMOVE the radio chassis and SEND it to an authorized Ford audio system repair facility. TEST the system for normal operation.
  • Page 12 1998 Expedition/Navigator Workshop Manual Page 12 of 25 Radio Chassis C261 Radio Amplifier C264 Silent Radio Speaker(s) Measure the resistance between the silent radio speaker connector(s) and radio amplifier C264; and between the silent radio speaker connector(s) and ground. Speaker Radio Amplifier Pin Radio Speaker Connector Pin Circuit LH Front C264-8...
  • Page 13 2 circuit 802 (O/R) Does the speaker(s) operate correctly? REMOVE the radio amplifier and SEND it to an authorized Ford audio system repair facility. TEST the system for normal operation. REMOVE the radio chassis and SEND it to an authorized Ford audio system repair facility. TEST the system for normal operation.
  • Page 14 (O/LG); and between radio amplifier C263-4, circuit 857 (W/O), and LH front radio speaker circuit 813 (L/W). Is the LH front radio speaker operating correctly? REMOVE the radio amplifier and SEND it to an authorized Ford audio system repair facility. TEST the system for normal operation.
  • Page 15 Is voltage present? REPAIR circuit 173 (DG/P). TEST the system for normal operation. If problem persists, GO to REMOVE the radio amplifier and SEND it to an authorized Ford audio system repair facility. TEST the system for normal operation. K2 CHECK CIRCUIT 689 (DB) NOTE: Circuit 689 (DB) directly feeds circuit 173 (DG/P) through the radio amplifier.
  • Page 16 1998 Expedition/Navigator Workshop Manual Page 16 of 25 Subwoofer Amplifier C442 Measure the voltage between subwoofer amplifier C442-5, circuit 173 (DG/P), and ground. Is the voltage greater than 10 volts? GO to L2. GO to L6. L2 CHECK CIRCUIT 797 (LG/P) Subwoofer Amplifier C443 Measure the voltage between subwoofer amplifier C443-1, circuit 797 (LG/P), and ground.
  • Page 17 Is the resistance less than 5 ohms between the subwoofer amplifier and the radio amplifier and greater than 10,000 ohms between the subwoofer amplifier and ground? REMOVE the subwoofer amplifier and SEND it to an authorized Ford audio system repair facility. TEST the system for normal operation.
  • Page 18 1998 Expedition/Navigator Workshop Manual Page 18 of 25 Insert known good headphones into the rear integrated control panel (RICP) jacks. Are both headphone sets inoperative? REPLACE the RICP. TEST the system for normal operation. If the left headphone is inoperative, GO to If the right headphone is inoperative, GO to M2 CHECK CIRCUIT 277 (LB/BK) Radio Chassis C261...
  • Page 19 1998 Expedition/Navigator Workshop Manual Page 19 of 25 Radio Chassis C261 Radio Amplifier C263 RICP C314 Measure the resistance between radio chassis C261-6, circuit 278 (P/W), and radio amplifier C263-5, circuit 278 (P/W); between RICP C314-5, circuit 278 (P/W), and radio amplifier C263-5, circuit 278 (P/W); and between radio amplifier C263-5, circuit 278 (P/W), and ground.
  • Page 20 1998 Expedition/Navigator Workshop Manual Page 20 of 25 Is the voltage greater than 10 volts? GO to N2. REPAIR circuit 829 (W/P). TEST the system for normal operation. N2 CHECK CIRCUIT 694 (BK/LG) Measure the resistance between RICP C314-3, circuit 694 (BK/LG), and ground. Is the resistance less than 5 ohms? GO to N3.
  • Page 21 1998 Expedition/Navigator Workshop Manual Page 21 of 25 Is the resistance less than 5 ohms between the radio chassis and the RICP; and greater than 10,000 ohms between the radio chassis and ground? GO to N5. REPAIR circuit 832 (LB/PK). TEST the system for normal operation. N5 CHECK CIRCUIT 833 (T) Measure the resistance between radio chassis C261-8, circuit 833 (T), and RICP C314-12, circuit 833 (T);...
  • Page 22 1998 Expedition/Navigator Workshop Manual Page 22 of 25 GO to P4. P3 CHECK GROUND Measure the resistance between SWC module C272-15, circuit 848 (DG/O), and ground. Is the resistance less than 5 ohms? GO to P7. GO to P5. P4 CHECK I/P FUSE 2 (5A) I/P Fuse 2 (5A) Is the fuse OK? REINSTALL the fuse.
  • Page 23 1998 Expedition/Navigator Workshop Manual Page 23 of 25 REPLACE the speed control servo (9C735). REFER to Section 310-03. TEST the system for normal operation. REPAIR circuit 57 (BK). TEST the system for normal operation. P7 CHECK CIRCUITS BETWEEN THE SWC MODULE AND THE RADIO CHASSIS Radio Chassis C261 SWC Module C272 Measure the resistance between SWC module C272 and radio chassis C261;...
  • Page 24 Substitute the radio chassis with a known good component. Check the SWC switch operation. Does the SWC operate properly? REMOVE the radio chassis and SEND it to an authorized Ford audio system repair facility. REFER to Section 415- 01. TEST the system for normal operation.
  • Page 25 1998 Expedition/Navigator Workshop Manual Page 25 of 25 http://www.fordtechservice.dealerconnection.com/pubs/content/~WSWJ/~MUS~LEN/20/... 8/30/2010...