Number plate lights

My MX5 mk2.5 has just failed its MOT as the rear number plate lights not working, Checked loom and light holders all seem ok … swapped lights over and now one stays on continuously even with the lights off

Any thoughts or ideas ???

Thanks
Neil

Earthing problem me thinks.

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The lights stay on until the boot lid is clicked shut.

What, even the number plate lights?

Yes, I think the idea is that they double up as boot lights. Coincidentally I have just changed mine for led ones about 15 mins ago.

I believe pheonix22 is spot on about the number plate lights. I fitted a relay into the boot light / number plate light wires on my Mk3.5 to do the same. I found that loading the boot in the dark, once something big was loaded, the boot light was often obstructed. I mounted a relay behind the boot plastic trim by the rear n/s wheel arch area.

Richard.

thanks for the reply’s … all sorted now cleaned the bulb holders and put new bulbs in, all working
Thanks again
Neil