Ford Mustang (1999-2004) Service Manual: Battery (Diagnosis and Testing)

Special Tool(s)

Micro 490 Digital Battery Analyzer 162-00004

Inspection and Verification

1. Verify the customer concern by operating the system.

2. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart

Mechanical Electrical

  • Battery

  • Battery mounting
  • Battery cables
  • Battery posts

3. If an obvious cause for a concern is found, correct the cause before proceeding to the next step.

4. If the fault is not visually evident, proceed to the pinpoint test.

Pinpoint Tests

PINPOINT TEST A: BATTERY CONDITION TEST

Test Step Result / Action to Take
A1 TEST BATTERY CONDITION Yes

Does the meter read, GOOD BATTERY? RETURN the battery to service. REFER to Section.

Does the meter read, GOODRECHARGE? CHARGE the battery and RETURN to service.

REFER to Section.

Does the meter read, CHARGE & RETEST? Fully CHARGE the battery and RETEST

No

Does the meter read, REPLACE BATTERY? INSTALL a new battery.

Does the meter read, BAD CELLREPLACE? INSTALL a new battery.
NOTE: No battery with a red test-eye should be replaced. The red eye only means the battery is discharged, not necessarily defective. NOTE: Failure to fully charge the battery before retesting may cause false readings.
  • Verify the battery condition using the Battery Analyzer.
  • Is the battery OK?
    Battery and Cables
    Vehicles are equipped with a 12 volt maintenance-free battery that contains a built-in hydrometer. The hydrometer eye indication is as follows: A green dot means the battery is OK. A yel ...

    Battery Disconnect
    WARNING: Batteries normally produce explosive gases which can cause personal injury. Therefore, do not allow flames, sparks or lighted substances to come near the battery, always shield you ...

    Other materials:

    Engine Ignition (Description and Operation)
    Eight separate ignition coils: are controlled by the powertrain control module (PCM). are mounted directly above each spark plug. are controlled by the powertrain control module for correct firing sequence. The spark plug: changes the high vo ...

    Refrigerant Lines
    The condenser to evaporator tube (19835) contains the high pressure liquid refrigerant upstream of the evaporator core orifice. The A/C manifold and tube (19D734) is attached to the A/C compressor, is sealed with O-ring seals, and has the following features ...

    Exhaust Gas Recirculation (EGR) Valve - Cobra
    Removal and Installation 1. Disconnect the accelerator cable and the speed control cable. 2. Remove the accelerator cable bracket bolts. 3. Release the clip and position the accelerator cable bracket and the cables aside. 4. Disconnect the electrical c ...