Battery light on. Diagnosis and fix. MAZDA MIATA.
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- Опубліковано 20 сер 2024
- This video explains the steps I took to diagnose the BATTERY LIGHT issue on my friend’s 2005 Mazda Miata. The process shown here is very similar for all 1990-2005 Miatas. However, the alternators vary by year and if the car is manual vs. automatic transmission.
Be very specific when ordering your replacement.
Sometimes, charging issues can be intermittent and hard to pin down.
Before replacing anything, make sure that all connections are tight and secure. One of my loyal viewers took the time to share his story with me. In his case, the nut that holds the main power cable to the alternator was coming loose and causing the battery light to come on intermittently.
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Important note: PLEASE DISCONNECT YOUR BATTERY BEFORE WORKING ON YOUR ALTERNATOR.
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Disclaimer:
Due to factors beyond the control of MiataMan, I cannot guarantee against improper use or unauthorized modifications of this information. MiataMan assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. MiataMan recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of MiataMan, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not MiataMan.
That maintenance looks so much easier in the NB than the NA.
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?
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.
Thanks for another Very useful video!
Another great video mate, thanks & have a Happy Christmas
Thanks Ian. Merry Christmas 🎄 and all the best for the year ahead.
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
I had this happen the same day i bought my nb. Hopefully its the alternator
I replaced mine this week I may need to tighten my belt
harika video
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.
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
I have the same issue
Same here, any fix yet?
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
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.
@@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.
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
I’m running 14.5 volts in my NA but I’m still having a battery light is there anyway to force remove it
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.
@@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
@@MiataManit’s a constant battery light
Why not flip the bolt on reinstall, it looked like the head would stick out just as much as the end did
Does anybody know what that dumb bolt is called because my alternator just doesn’t have it and I need one
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.
Hi pal I have changed the alternator and battery on my mk2 but the car is still not holding a charge, any udeas
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 👍
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.
Consider ECU swap