LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2004 >> Thunderbird >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Vehicle Speed Control) >> Diagnosis And Testing >> Speed Control >> Symptom Chart
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Symptom Chart

WARNING: This page is about a different car, the 2003 Ford Thunderbird. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM CHART

Condition Possible Sources Action
No communication with the powertrain control module (PCM)
  • Battery junction box (BJB) fuse(s):
    • 31 (40A)
    • 2 (5A).
  • Circuitry.
  • PCM.
 REFER to MODULE COMMUNICATIONS NETWORK .
The speed control is inoperative
  • Clockspring.
  • Circuitry.
  • Powertrain control module (PCM).
  • Speed control switch.
 Go To PINPOINT TEST A .
The speed control switch is inoperative
  • Powertrain control module (PCM).
  • Speed control switch.
 Go To PINPOINT TEST B .
The speed control indicator lamp is always on
  • Circuitry.
  • Instrument cluster.
  • Powertrain control module (PCM).
 REFER to INFORMATION, GAUGES & WARNING DEVICES .
scientia non olet · About LEMON Manuals