Parts for your 1990 Mitsubishi Pajero-Exterior bulbs

1990 Mitsubishi Pajero Exterior Bulbs — Purpose, Care and Replacement

Exterior bulbs are absolutely fitted and relevant on the 1990 Mitsubishi Pajero. This is confirmed by the Mitsubishi Pajero/Montero Factory Service Manual (1989–1991, Electrical—Lighting), the 1990 Pajero Owner’s Handbook (lighting and maintenance sections), and Australian Design Rule ADR 13/00 governing vehicle lighting. The vehicle uses serviceable exterior lamps, including headlamps, indicators, tail/stop, reverse, number plate and marker lights.

On a ’90 Pajero, those exterior bulbs do the heavy lifting for visibility and safety—letting others know when it’s braking, turning, or reversing, and giving the driver clear vision at night and in poor weather. Depending on trim and market, it’ll run halogen headlamp bulbs (commonly H4 on replaceable-lens models, some early variants used rectangular sealed-beam units), wedge-type parkers, single- or dual-filament stop/tail bulbs, and festoon or wedge-type number plate bulbs. Because there are market and model-year variations, checking the owner’s manual or the lamp holder markings is the safest way to confirm wattage and base type.

As part of routine servicing, a quick globe check under the bonnet and around the vehicle pays off. It’s wise to:

• Test all lamps every 6 months or at each service—headlights (high/low), indicators/hazards, parkers, stop/tail, reverse, fog (if fitted), and number plate lights.
• Match the correct wattage and base when replacing, mismatches can overheat holders or trip fuses.
• Avoid touching halogen glass with bare fingers—use gloves or a clean tissue to prevent hot spots.
• Inspect lenses and seals for cracks and moisture, fix leaks to prevent repeat failures and corrosion.
• Clean earth points and use a dab of dielectric grease on bulb bases where appropriate to combat corrosion.
• If a bulb fails, check the relevant fuse and the socket condition, a green or powdery socket suggests water ingress.

Keen on brighter lighting? Quality halogen upgrades can lift output while staying ADR/WOF compliant. LED retrofit bulbs may be possible for some positions, but legality varies—headlamps in particular must meet beam pattern and compliance requirements. When in doubt, stick with ADR-compliant globes and keep spares in the glovebox for hassle-free rego or WOF checks.

Popular questions about 1990 Mitsubishi Pajero exterior bulbs

What bulb types does a 1990 Pajero use?
Most Aussie/NZ 1990 Pajeros use replaceable halogen headlamp bulbs (often H4 60/55W), T10 wedge parkers, and common stop/tail globes (21/5W dual-filament) with BA or offset-pin bases. Some variants had sealed-beam headlamps. Always confirm against the owner’s manual or the markings on the old bulb to avoid fitment or wattage issues.

Can the exterior bulbs be upgraded to LED?
LED upgrades may be suitable for interior, parkers, and some indicator/tail positions if they meet ADR/WOF requirements and don’t trigger hyperflash. Headlamp LED conversions are often restricted unless the housing and beam pattern remain compliant. Check local rules and choose ADR-compliant components.

Why do bulbs keep blowing on my Pajero?
Frequent failures often point to vibration, poor earthing, water ingress, or over-voltage from a weak regulator. Inspect for cracked lenses or seals, clean grounds, and verify charging voltage (around 13.8–14.4V with the engine running). Replacing rusty sockets and using quality globes usually solves repeat issues.