Question about Mazda MX-5 Miata

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Have a 1990 miata ,interior lights don't work all fuses are good?

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  • Anonymous Sep 04, 2008

    interior light on my 1997 mk1 has suddenly ceased to work-also the cigar lighter outlet is dead, are these two items connected? if so where do I find the fuse for these as it does not seem to be in the fuse box under the bonnet and I cannot locate one elsewhere.

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If you haven't solved the problem yet here is what was giving me fits in my 1990 (11/89 DOB). The on/off/door on switch on each light had become very dirty over the years. I used some CRC contact cleaner and a small brass brush to clean and polish the switch contacts and problem solved.

Posted on May 10, 2009

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I haven't had a Miata so I'm not sure of the set up, but basically the two areas you can check are;-

1/. the bulb in the interior light to see if its blown and if so replace it.

2/. the door switches that usually opperate the light when the doors are opened.

Usually the doors have a push button switch that keeps an open circuit when the door is closed and the button is depressed, keeping the contacts apart, and when you open the door the spring loaded button switch pushes out and closes the contacts for the lighting circuit.

There is a switch to detect the door opening on each side, but on a car of this age its possible that they are both corroded and so not making a closed circuit when the doors are opened due to the corrosion of the contacts i the switch or that the switches are worn and not operating when the door is opened.

You can lube up the switches by spraying with WD40 and see if they get better. You may need to take them out and check the circuit by closing the wires to the body of the car and seeing if the light comes on (assuming the bulb is good to start). And if that is not the case then it becomes a nighmare of tracing the wiring though the car and checking the connections at the other end.

Worst comes to the worst a manual for the Miata can be bought at Autozone or Peb Boys or one of the many car supply shops and it will show you the wiring diagram for the doors so you can see where the other end of the door switch cable should be connected.
Basically if its not fixed by replacing the bulb or making sure the door switches are working it gets a lot more complex and may not be worth the effort.

So check there first and see if you can get a light at all

Hope that helps

Posted on Aug 08, 2008

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SOURCE: Why rear brake lights not working on 1990 Mazda

You'll have to inspect the brake light switch at the pedal box assy. Damaged switch or wiring could give the previous symptoms you describe.! Good luck

Posted on Apr 05, 2010

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Posted on Jan 02, 2017

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