Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCURY1989GRAND MARQUIS GSREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEM5.0L CEC TESTS W/CODESQUICK TESTCONTINUOUS CODE/TEST MENU
1989 Mercury Grand Marquis GS
Continuous Code/Test Menu
1989 Mercury Grand Marquis GSSECTION Continuous Code/Test Menu
CONTINUOUS MEMORY - CIRCUIT TEST & STEP
| Code No. | Go To: Circuit Test No. (Step No.) |
|---|---|
| 14 | D12 (1) |
| 15 | D15 (1) |
| 18 | D12 (3) |
| 22 | B6 (13) |
| 29 | B12 (1) |
| 31 | B11 (26) |
| 32 | B11 (25) |
| 33 | B11 (28) |
| 34 | B11 (40) |
| 35 | B11 (26) |
| 41 | C1 (28) |
| 51 | B5 (10) |
| 53 | B8 (11) |
| 54 | B2 (10) |
| 56 (MA SEFI) | B3 (10) |
| 61 (SEFI) | B5 (13) |
| 63 (SEFI) | B8 (15) |
| 64 | B2 (13) |
| 66 (MA SEFI) | B3 (4) |
| 87 | C2 (26) |
| 91 | C1 (28) |
| 95 (MA SEFI) | C2 (21) |
| 96 (MA SEFI) | C2 (24) |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.