The service and repair manual for the 1990 Mercury Grand Marquis — the 5.0L V8 engine, 2 trims. Matched to this exact model year, so the specifications and sequences are the ones Mercury published for your car, not figures carried over from a neighbouring year.
01 / FitmentWhat this manual covers
| Model year | 1990 |
|---|---|
| Engines | 5.0L V8 — OHV |
| Trims | GS Sedan 4-Door · LS Sedan 4-Door |
| Federal record | 1 recall · 63 complaints · 36 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 1990 Grand Marquis manual
03 / ContentsSections in the manual
- Quick Lookups 69
- General Information 1,478
- Accessories & Equipment 345
- Heating, Ventilation & A/C (HVAC) 277
- Body & Frame 112
- Maintenance 134
- Brakes 196
- Restraints 89
- Drivelines & Axles 50
- Steering 184
- Electrical 181
- Suspension 100
- Engine Mechanical 132
- Transmission 175
- Engine Performance 838
04 / Known issuesRecalls on federal record for the 1990 Grand Marquis
- Air Bags — frontal · 90E043001Inflator component separation allows hot combustion gases to escape into the passenger compartment w.
Owners have filed 63 complaints and Mercury has issued 36 technical service bulletins for the 1990 Grand Marquis. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 1990 Grand Marquis manual
Is this manual specific to the 1990 Grand Marquis?
Yes. It is the OEM manual matched to the 1990 model year, covering the 5.0L V8 across the GS Sedan 4-Door, LS Sedan 4-Door trims. Specifications and procedure sequences are the ones Mercury published for this year.
What 1990 Grand Marquis problems does it help with?
1 recall is on federal record for the 1990 Grand Marquis, covering air bags. The manual carries the manufacturer's diagnostic and repair procedures for those systems; the recall repairs themselves are done free by Mercury dealers.
Does it include 1990 Grand Marquis wiring diagrams?
Yes — the complete wiring diagrams for the 1990 build, alongside repair procedures, specifications and diagnostics.
Is it a subscription?
No. $29.99 once and the manual is yours. It is a digital manual — nothing ships; access details arrive by email after checkout and it works on any device.
RelatedOther Grand Marquis years and 1990 Mercury models
1996 Grand Marquis · 1995 Grand Marquis · 1994 Grand Marquis · 1993 Grand Marquis · 1992 Grand Marquis · 1991 Grand Marquis · 1989 Grand Marquis · 1988 Grand Marquis · 1987 Grand Marquis · 1986 Grand Marquis · 1985 Grand Marquis · 1984 Grand Marquis · all 30 years
1990 Mercury Capri · 1990 Mercury Colony Park · 1990 Mercury Cougar · 1990 Mercury Sable · 1990 Mercury Topaz · 1990 Mercury Tracer · every 1990 model