I have a problem with my 1993 Mazda Miata MX-5. The right cooling fan will not operater when the engine gets hot. I have tested the fan relay, thermoswitch, and the TFA terminal located in the diagnostic box. all components are good. Thermoswitch has continuity when hot, and no continuity when cold below 192 degrees. Please send me a solution to this problem.

Question edited for clarity.
Question moved to model category.

Yes, you are correct, disconnecting the fuse box has broken the pairing between the key and the immobilizer system. Did you remove the main connection plugs to the fuse box? My thought is that those connectors have never been removed since the car was built and breaking a remaking the connection, you might have some connections that as not as good as they should be. Pull the connectors again and give them a good spray with electrical contact cleaner (that is NOT WD40). Then reconnect.

There is various ideas on resetting the Immobilizer here.

https://www.google.com/search?q=mazda+miata+immobilizer+system+reset

Or a Mobile Auto Locksmith

https://www.google.com/search?q=mobile+auto+locksmith+near+me

Just for fun, here are the Fuse Box locations and diagrams. They have changed over the years, and as you didn't state the year, here is all of them.

Mazda MX-5 Miata (NA; 1989-1997) fuses

Fuse Box Diagrams https://fuse-box.info > mazda > mazda-mx-5-miata-na...

Here you will find fuse box diagrams of Mazda MX-5 Miata 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, get information about the location of the fuse ...

Mazda MX-5 Miata (ND; 2016-2023) fuses

Fuse Box Diagrams https://fuse-box.info > mazda > mazda-mx-5-miata-nd...

Fuse box diagram (location and assignment of electrical fuses) for Mazda MX-5 Miata (MX5) (ND; 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023).

On this website you find it


https://www.autogenius.info/mazda-mx-5-1989-1997-fuse-box-diagram/

on the highway you have air flow threw the raid on side roads no air speed is the fan turning on?

Sounds like the starter relay or the solenoid is on the start itself is badSome of the MX-5 also had a fuse for the ignition, check that also.

Hi,

This is found in the 3 relays at the rear of the left hand side of the engine bay.

Thanks

Jason

it could be a blocked catilytic convertor

Sounds like too much draw on system. To test turn off radio. I would route separate heavy wires to power radio. Use a 12 volt relay to control (e.g. 30 amp auto relay). Connect normal radio power to power relay (so that key controls radio)

possibly a bad module------cracked---or???? In any case you may get expansion as engine compartment warms up----module shuts you down. Sometimes really hard to diagnose and just putting in a new module is "spendy"----especially if it turns out not to solve the problem!

you may want to check your timing

the noise is caused by the hot exhaust, all cars do this, the exhaust gets up to 1000 degree's. The noise is the metal contracting as it cools, it is a clicking or popping noise.