Symptom/Test Menu
WARNING: This page is about a different car, the 1989 Mercury Grand Marquis, 1989 Lincoln Town Car, 1989 Lincoln Mark VII, 1989 Ford Mustang, and 1989 Ford LTD Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSIS BY SYMPTOM (SYMPTOM-TO-CIRCUIT TEST MENU)
| Symptom | Go To: Circuit Test No. (Step No.) | ||
|---|---|---|---|
| Runs Rough/Misses/Stalls/Lacks Power/Rough Idle/Surges In Self-Test (1) | D19 (2) | ||
| Stalls At Idle Or During Self-Test | D19 (1) | ||
| Stalls When Parking | N/A | ||
| A/C Stays On During WOT | D7 (11) | ||
| A/C Not Functioning | D7 (11) | ||
| Low Idle With A/C On | B13 (10) | ||
| High Idle In "Drive" A/T Trans Only | N/A | ||
| Shift Indicator Light Always/Never On (MA SEFI only) | D6 (1) | ||
| "CHECK ENGINE" Light Always On | D11 (1) | ||
| "CHECK ENGINE" Light Never On | D11 (2) | ||
| "CHECK ENGINE"/"CHECK DCL" Message On | N/A | ||
| "CHECK ENGINE" Message On | N/A | ||
| "CHECK ENGINE" Light On Intermittently | D11 (5) | ||
| "CHECK ENGINE" Light Flashes With Erratic Idle | D11 (6) | ||
| Lack Of Power At WOT | N/A | ||
| Tachometer Inoperative | N/A | ||
| Stumble After Hot Restart | C1 (19) | ||
| Fuel Pump Runs With Engine Off (SEFI only) | C2 (14) | ||
| Gasoline Fumes In Engine Compartment | D4 (1) | ||
| Detonation/Spark Knock | N/A | ||
| Poor Performance, Low Or High Supercharger Pressure | N/A | ||
| Engine Cooling Fan Inoperative (Single Speed Fan) | N/A | ||
| Engine Cooling Fan Inoperative (Dual Speed Fan) | N/A | ||
| Cooling Fan Always On | N/A | ||
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