Parts for your 1991 Mitsubishi Pajero-Headlights

1991 Mitsubishi Pajero Headlights — purpose, care, and easy replacement tips

Headlights are absolutely fitted and relevant on the 1991 Mitsubishi Pajero. This is confirmed by the Mitsubishi Pajero NH (1991) workshop and owner’s manuals, as well as Australian Design Rules ADR 13/00 (installation of lighting) and ADR 46/00 (headlamps). New Zealand’s Land Transport Rule: Vehicle Lighting also requires compliant headlamps for road use. So yes — the ’91 Pajero runs conventional halogen headlights and they’re essential gear for safe driving on- or off-road.

On most 1991 Pajero variants, the primary bulb is a dual‑filament H4 (typically 60/55 W) handling both low and high beam in a reflector housing, with small wedge bulbs for parkers. The job of these lights is simple but vital: illuminate the road ahead without dazzling oncoming traffic, help others see the vehicle, and stand up to rough conditions from corrugations to creek crossings.

When it’s time for a change-out, replacing the bulbs is a straightforward bonnet-up job: unplug the three‑pin connector, pop the spring clip, remove the rubber dust cap, swap the H4, and refit — taking care not to touch the new bulb’s glass. Replace bulbs in pairs so brightness and colour match. After any bulb or housing work, check and adjust beam aim to avoid dark patches or glare.

• Service checks: clean lenses with a plastic‑safe cleaner, inspect for yellowing or crazing, look for moisture inside and clear blocked breathers.
• Electrics: confirm good earths, test fuses and the headlight relay, and make sure the alternator is charging well — low voltage makes halogens dim.
• Aim: use the vertical and horizontal adjusters on the lamp unit, set on level ground facing a wall and fine‑tune to local ADR/NZ specs.
• Upgrades: higher‑performance halogen H4s (ADR/E‑marked) are fine, avoid drop‑in LED/HID bulbs in halogen reflectors — they’re usually non‑compliant and can cause glare.

If lenses are cloudy, a proper plastic restore and UV seal can bring back clarity. If the reflector is peeling or the housing is cracked, it’s time for a replacement assembly. After water crossings, check for fogging, dry the housing and reseat the dust cap, and use a dab of dielectric grease on connectors to keep corrosion at bay. With a little attention, a 1991 Pajero’s headlights stay bright, legal, and ready for long country nights.

What bulb type does a 1991 Mitsubishi Pajero use?

Most ’91 Pajero models use an H4 60/55 W halogen for low/high beam, plus small wedge bulbs for parkers. Market and trim differences exist, so it’s smart to confirm against the vehicle’s handbook or the markings on the lamp housing before buying.

Are LED or HID conversions legal on a 1991 Pajero?

In Australia and New Zealand, fitting LED or HID bulbs into halogen reflector housings is typically not road‑legal and can cause dangerous glare. If an upgrade is wanted, stick with quality ADR/E‑marked halogen H4s or replace the entire lamp with a compliant unit designed for that technology.

Why are my Pajero’s headlights dim or yellow?

Common causes include ageing halogen bulbs, cloudy plastic lenses, voltage drop from tired wiring or poor earths, and moisture in the housing. Renew bulbs in pairs, restore the lenses with a UV‑sealing kit, clean and secure earths, and check fuses/relays and alternator output.