On the Ford Transit Custom the headlight bulb can't be accessed from behind the headlight unit without removing it first — there simply isn't enough room behind the headlight to get your hand in. The good news is the headlight only has two T30 Torx bolts and one electrical connector holding it in, so the whole removal takes less than five minutes.
The dipped beam bulb on this Transit Custom is a standard H7 (LLB477 55W) — readily available from any motor factor or parts supplier in the UK.
Bulb Specification — Ford Transit Custom
What You'll Need
Step-by-Step Guide
Locate & Remove the Two T30 Torx Bolts
Open the bonnet. The headlight unit is held in by two T30 Torx bolts — one at the top of the headlight unit and one towards the inner edge. Remove both. There is also a small plastic clip at the top of the headlight which you can simply lift up and release.
Wiggle the Headlight Free & Disconnect the Plug
With both bolts out, carefully wiggle the headlight unit forward and out towards you — be gentle as there's a rubber gasket on the side that you want to keep intact. Once it's pulled forward enough to access the back, unclip the electrical connector. The headlight unit is now completely free and can be taken to the bench.
Remove the Rubber Cover & Old Bulb
On the bench, pull the rubber dust cover off the back of the headlight — it simply pulls free. You'll now see the bulb. Unclip the wiring connector from the bulb and tuck it to the side. The bulb itself is held in by a small spring clip — push the bottom of the bulb upward and it will ping out of the spring clip and can be pulled free. Dispose of the old bulb — on this Transit it was completely blown.
Fit the New H7 Bulb
Take the new H7 (LLB477 55W) bulb from its packaging. Critically — do not touch the glass of the bulb with bare fingers. Hold it by the plastic base only. Oils from your skin on the bulb glass cause hotspots that dramatically shorten the bulb's life. You'll notice a small locating tab on the top of the bulb — line this up with the corresponding slot in the headlight holder. Push the bulb firmly into position until the spring clip locks it securely in place. Reconnect the wiring connector and refit the rubber dust cover.
Refit the Headlight Unit
Back at the vehicle, plug the headlight connector back in — make sure it clicks fully home. Locate the headlight unit back into position, making sure the rubber gasket sits correctly on the side. Refit both T30 Torx bolts and tighten them up. Re-seat the plastic clip at the top.
Test the Headlight
Turn the ignition on and switch on the headlights. Both dipped beams should now be working. If the new bulb doesn't illuminate, check the connector is fully seated and that the bulb is correctly located in the spring clip. If it still doesn't work, suspect a fuse or relay rather than the bulb.
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Job Summary
What to expect on this job: