Battery light on. Diagnosis and fix. MAZDA MIATA.

[@BokBarber]

That maintenance looks so much easier in the NB than the NA.

[@robinforrest7680]

Very useful. This is being stored in my mx5 archive for the day when I'll need it. That pivot bolt is a major pain in the arse, even when you're only changing the belt. What were the designers at Mazda thinking?

[@Jmiesonboy]

I had this happen with my 99 nb miata a few days after I bought it, I also had all of my coolant leak out from a gasket that was really hard to get to

[@peqkz4184]

I had this happen the same day i bought my nb. Hopefully its the alternator

[@hannahhahn5581]

Whats it mean when I tested the battery, it was testing at 14.5-15. Check engine light is on for multiple misfire detected. Overcharging is also shown up on another alternator / battery tester.

[@108bobman]

damn, my diagnosis was quick. there was no belt on the alternator pulley. luckily my skid plate caught the belt... atleast what remained of one.

[@Lurchin]

Another great video mate, thanks & have a Happy Christmas

[@MiataMan]

Thanks Ian. Merry Christmas 🎄 and all the best for the year ahead.

[@ImDisrrxpt]

I’m running 14.5 volts in my NA but I’m still having a battery light is there anyway to force remove it

[@MiataMan]

Is the battery getting hot? On rare occasions, an “overcharge” condition can trigger the battery light to come on. I would also double check all connections and grounding points.

[@ImDisrrxpt]

@@MiataManall grounding points and connections are good but I think it could be because I’m running a 96 civic battery, but my fuse box ground was disconnected for a long time and I reconnected it now I have proper voltage but still a battery light

[@ImDisrrxpt]

@@MiataManit’s a constant battery light

[@hillbillysportsman5818]

Thanks for another Very useful video!

[@ChutneyInc.]

Would you share the part number of the new alternator? As well as where it was purchased from because us 01-05 miata guys are hurting for a reliable source to find an alternator that plays friendly with the voltage regulator that's inside our ecu's

[@ChutneyInc.]

I replaced mine this week I may need to tighten my belt

[@dirtydrifts...2632]

Hi pal I have changed the alternator and battery on my mk2 but the car is still not holding a charge, any udeas

[@MiataMan]

Have you tested the alternator to make sure it’s working correctly and generating the correct voltage? New/remanufactured parts can be defective. If you are losing battery power overnight, you likely have a bad ground or a faulty electrical component. A bad ignition switch or faulty could cause an electrical drain. Let me know what you find out 👍

[@MiataMan]

You should also check to make sure all the connections to the alternator are tight. Be sure to disconnect the battery before working on it.

[@WickdPerfekT]

Consider ECU swap

[@dillonslate6291]

Does anybody know what that dumb bolt is called because my alternator just doesn’t have it and I need one

[@MiataMan]

Are you referring to the “adjuster bolt”? It is a combination of a long bolt that goes through a block and has a shorter bolt that locks it to the alternator bracket.

[@issacsisneros2489]

I’ve swapped my alternator, battery, checked all the fuses and connections, and after everything, the alternator isn’t charging the battery but the alternator is working

[@saber2074]

I have the same issue

[@dopey6763]

Same here, any fix yet?

[@issacsisneros2489]

Alright so after having tons of issues I recently discovered that there’s a main ground wire in the ppf. Mine was disconnected and after I had bolted it back, my car worked perfectly fine. For everyone else, the ground is more towards the back of the ppf by the rear right wheel

[@saber2074]

Edit: found out that the positive wire running to the alternator was broken. So I just cut it, covered it up and then ran a wire from the starter to the alternator.

[@dopey6763]

@@issacsisneros2489 thanks I’ll check on that once I get home from work. I got a new battery and alternator and it charges the battery but then dies out once I start the car and doesn’t let me drive it.

[@dillonslate6291]

Why not flip the bolt on reinstall, it looked like the head would stick out just as much as the end did

[@EndemikBitki-xc6li]

harika video