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Mazda MX-5 Miata Electrical Problems

green55green55 Posts: 2
edited January 2014 in Mazda
My 1997 Mazda Miata headlights stopped working in the open position. The lights still operate but the raise and lower actuators do not. I checked the fuse panel for the obvious but need help in diagnosing this problem.


  • rt69rt69 Posts: 1
    A few days ago I rplaced my headlights with new ones the old ones were just dull and old but worked fine, last night I went to use the Hi-beams and nothing, I pulled back on the turn signal switch and they went on, Anyone have any ideas???????
  • ateixeiraateixeira Posts: 72,587
    Maybe a harness is connected upside down? That's my guess.

    Sorry, never worked on the pop-up headlights. At least you can still use them. Imagine if they were stuck down!
  • lost6lost6 Posts: 2
    I had the same problem in another vehicle, and had to replace the harness from the turn indicator to the lights.
  • I have been reading several of the posts about removing the battery and having to re-enter a security code for the anti-theft/radio to start working. I had purchased this vehicle over a year ago after it have been in a wreck. I recently finished putting it back together and have found that the radio does not work at all. Can anyone help me figure out how to get the radio working? Also this Miata has a key fob with it. Thanks!!
  • My headlights stopped working, I checked the fuse and it's OK. They pop-up and close with no problems. Is it possible that both lights could burn out at the same time??
  • ateixeiraateixeira Posts: 72,587
    Yes, in fact that's very likely, because bulb life tends to be pretty consistent.

    I had lights burn out within a week of each other, and this was after 7 years of use!
  • My Miata has no headlights in the low beam position only. The high beams work fine, The manual (Haynes) suggests the combination switch mounted on top of the steering column as the culprit, and sure enough, there is no continuity between the terminals listed. What I need to know is what needs to be replaced, The entire sub assembly, with the directionals, cruise control, etc. or is there an easier way out? Also, any suggestions as to where to find the right part would be helpful.
  • I have 1997 mx5 with complete gauge package & my oil pressure gauge is not working many say that 1997 only came with oil light but mine has actual gauge could this be the sending unit and were can I locate the unit to test

    thank you
  • I have a 1990 miata and the windows do not work but the headlights do, friend gave me the car and I am trying to fix it.

  • Our miata is having electrical difficulty. First we had to replace the battery, then the alternator, then the ignition coil, but it still has the problem. If we use the radio, heater, lights, it will run down and die. It will only run right if all these things are off.

    If anyone has had this or similar difficulties, can you tell me what you did to fix it? Where is the regulator located. The repair book doesn't mention it so we assumed it was internal in the alternator, the parts store has a part, but we can't find it. That is about the last thing we have to check or replace, so where is the dang thing located?????

  • zaphoidzaphoid Posts: 1
    Has anyone had any problems with the tail lights and dash lights going out? The fuse continues to blow and nothing has been done to the electrical system. I did increase the fuse size by 5 amps and that did not help.
  • ateixeiraateixeira Posts: 72,587
    I've lost a bulb on my '93, but no other problems.
  • shmoogeyshmoogey Posts: 1
    Did you ever get an answer to your question on Miata high beams? I have the same problem in a 2000 Miata.

  • natedog1natedog1 Posts: 3
    I am embarrassed to say that both low beams were burned out at the same time. I tried a used column switch before I figured it out. The column switch is under the steering wheel and controls the trun signals wipers etc.
  • ateixeiraateixeira Posts: 72,587
    It's weird, how that happens. I've had bulbs blow out after 7-9 years, and then the 2nd one will blow out within a week of the other.

    Incredible coincidence, really.
  • archerjsarcherjs Posts: 1
    Help if you can. I was driving my 1999 Miata at 60 mph everything working fine and then I pushed the airconditioning button and the car ignition just shut down and now it will not start. Can any one please tell me what the problem may be? Thx
  • boerneboerne Posts: 1
    I have a 2007 Miata. Last week while I was driving on the highway, suddenly and briefly, everything shut off - the radio, cruise control, AC, etc. I'm guessing the engine might've stopped for a second or two but it was hard to tell because of the cruise control shutting off at the same time. But then, everything came back on as quickly as it had shut off - all of the instrument panel lights came on, then shut off, leaving only the ABS, anti-skid, and the handbrake lights staying on. It appeared to be working normally.

    I took it straight to the dealer who has now had it for several days. They test drove it (and of course there was no repeat occurence), flahsed the computer (making the warning lights go away), but still have no idea what happened. They are checking the Mazda "Tech site" to see if there are any other reports of the problem.

    Has anyone else experienced this?

  • cpicocpico Posts: 1
    I have a 1990 miata and all my dash and interior lights don't work. All the fuses are fine any suggestions?
  • ateixeiraateixeira Posts: 72,587
    Hmm, could it be the bulbs? That would be a pretty big coincidence, but maybe there was a power surge that blew them all out.

    Check the bulbs by your right knee, that's the easiest one to access.
  • red93red93 Posts: 1
    I was driving down the road about 75 MPH for about 2hrs when the dash went out. No warnings ,nothing. All gauges were gone radio,tach,temphorn,lights,turn signals to mention a few. Stopped at rest stop and shut it off . Would not restart. Battery dead. Had it towed mechanic tested battery and alternator both checked OK. Drove the car back and it did it again . Dead battery etc. Recharged battery and it works ok. I think its the alternator . The time to charge the battery gave time for the alt. to cool (?). I have been told maybe ground issues,bad ignition switch etc. I have had this car only a few months and I dont have them figured out yet. Any thoughts would be appreciated. :confuse:
  • Car died...just like reason. Cruising through my school parking lot, and about to corner in first died. All electric was out. Nada. Called AAA.
    Guy couldn't find out polarity of battery to jumpstart it. While he is looking, the trunk light suddenly goes on. Whoa. I've only had the car a few weeks. Car had only been on for a few minutes. It has only 11,000 miles, garage kept, super clean.
    Total enigma. I've noted others stating that they've had their car suddenly die, and come back to life later. The AAA tow truck guy did nothing. His battery was sitting near my battery, but he never hooked it up. 45 minutes after dying, car started as if nothing was wrong. Help. I don't want this to happen on a highway or other bad location. :surprise:
  • According to the check engine code, my 1997 MX 5 (M edition) automatic tranny, has a bad heat sensor. Anyone familiar with these, and how involved is the replacement procedure?
  • ateixeiraateixeira Posts: 72,587
    Sorry, no, never even heard of that part.
  • ateixeiraateixeira Posts: 72,587
    I was reminded how these really don't last all that long...

    My engine started misfiring - BADLY. It sputtered at certain RPM like I've never seen.

    First I checked the timing, but that was OK. I thought it might have been knocked out of the right timing setting since my Miata was hit last week (again).

    Then I replaced the wires, and sure enough, they basically fell apart when I was taking the old ones out. Half of the connector came off on the spark plug, even though I had used boot grease.

    Replaced those, and the spark plugs as well, and she's running like new.
  • avid1avid1 Posts: 1
    My 1992 has the exact same issue. Did you fix yours? How?
    fyi: regulator is integrated into the alternator

    I replaced both the batt & alt. also the cooling fan relay

    have had both the new batt & alt bench tested twice. both good
  • Were you able to solve this problem? I don't have the exact problem but similar. Mine will be dead after a week or two of not using. Even keeping an trickle charger on it. Had it looked at by a Mazda dealer and twice by a Japanese auto specialist. I'm ready to give up since they can't find the problem.
  • jfloriojflorio Posts: 1
    I wanted to know what the rectangular box is on the passagers side, engine compartment, that is located closest to the firewall rather than the very front of the car. I looks like there are some brake lines running to it, but its not the master cylinder (opposite side), the humming is electrica because it ran my battery dead, I can't imagine what it could be.
  • Hey you need to look at the RECALLS on the 1990 Miata's that in one of the recalls, call you closes MAZDA SALE'S and if it hasnt been fixed yet they HAVE TOO do it for FREE
  • firejoyfirejoy Posts: 1
    I recently had the exact same problem. The battery indicator light went on. I stopped at a garage and had the battery and alternator checked, they were both okay. I've checked all the fuses and they are also fine. The battery indicator light went out at lower rpms, but would come back on at higher rpms. The car shuddered, with a loss of power to the cruise control/stereo/cigar lighter. The air bag indicator light flashed briefly, but has not flashed since. The car continues to start and run properly. Any answers to what should be checked next? Thanks
  • lordelpuzlordelpuz Posts: 16
    I have a V Spec Eunos Roadster, 1990,I live in the uk, the last weeks weather has been boiling hot, till now things have been fine, but a couple of days back as i was stuck in traffic the temp dial went up to almost boiling, i pulled over and switched off, the Eunos has two twin fans, one is the aircon or so i have read, but the other wasnt working, and i noticed the previous owner had disconnected the fan under the hood, via the two snap together joints, so i put em back together, everythngs fine, till i get home an find the fan wont go off unless i pull the connections apart again, Ive odered a new tempreture sender from the front section, the one that controls the fan thinking it could be the sender thats packed up, as the fan works when the engines hot or cold once i put the two halves together again, Ive not recieved the new sender yet but just in case thats not the reason i'd be gratefull for any help or ideas..please.
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