MX5/Miata headlight conversion wiring help please!

PostPost by: berni29 » Tue Jan 07, 2025 9:49 am

Hi There

I have read all of the information that I can find both on lotuselan.net and elsewhere about how to wire my (from previous owner) plus 2 headlight motor conversion up.

I have the 5 wire MX5 (1994 I think) motor and it is connected to a NC 5 pin relay. If I connect power for an instant the motor rotates 360 degrees and stops. if I connect that power constantly the motor will rotate constantly.

I have seen some posts saying that I need another relay, but how to wire? The diagrams I have seen just do not make sense to me and do not work if I copy them.

Anyone have an idiots guide please? I managed to get the standard Ford EFI working, but this has be stumped haha.

Many thanks

Berni
Zetec+ 2 under const, also 130S. And another 130S for complete restoration. Previously Racing green +2s with green tints. Yellow +2 and a couple of others, all missed. Great to be back 04/11/2021 although its all starting to get a bit out of control.
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PostPost by: RichardHawkins » Tue Jan 07, 2025 7:42 pm

Berni,

I have done this, it was several years ago and I am away from home at present. If no one else offers help I will be home Friday but will need reminding.

From what I can remember one of the 5 wires was connected to a “tell tale light” on the MX5 dash, so is effectively redundant, the system works like a two way domestic light circuit. My memory is perhaps wrong but I think a “changeover relay” is used, I also think there are two power supplies so that if you switch the ignition off with the pods up they will go down.

Hopefully someone who is electrically competent will correct me here. I am a mere mech Eng.

Hope this helps,

Richard Hawkins
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PostPost by: berni29 » Tue Jan 07, 2025 10:34 pm

Hello Richard

Thank you for your kind offer. I have rewired mine to include another relay, and will test it tomorrow. I’m pretty confident it won’t work haha.

All the best

Berni
Zetec+ 2 under const, also 130S. And another 130S for complete restoration. Previously Racing green +2s with green tints. Yellow +2 and a couple of others, all missed. Great to be back 04/11/2021 although its all starting to get a bit out of control.
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