When i start my car the brake, battery and airbag light come on.
I have a 97nissan maxima and now when i turn my car on the brake, battery and airbag light come on, soon after the car stops and i'll need a jump. i've been thru 3 new batteries. i took the alternator to be rebuilt but when the guy put it on the machine he said it was reading the right amount of amps and nothing was wrong with the alternator. i was told to get the alternator rebuilt anyway. What do u think the problem is?
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I think you mean either ABS or SRS.
ABS refers to the braking system so this would need investigation....I.e.check brake fluid reservoir and for signs of leaks round brake pipes and wear on pads.
SRS supplemental restraint system...usually airbag warning light. They should go out after 5 seconds on start.sometime they can be reset by using various techniques like leaving the driver door open...turning the ignition on but not starting the car... Then pressing the door light switch button on bottom of driver door opening 5 or 6 or 7 times and turning off ignition All within 10 seconds.(you may need to experiment with this number )always hold the door light button in on last count whilst turning ignition off.then close door restart car.wait 5-7 seconds then it will reset unless there is actually a problem with airbag.this can occur when you disconnect battery or replace battery.the interruption can
alter airbags sensor.also some sensors are housed in the horn component of car horn and the spring on horn can interfere with the sensors normal operation.So did you recently remove battery or use horn excessively ?finally if it is an airbag fault and the light remains on it may mean your airbag will not deploy and your seat belts won't lock in a collision scenario.best in that event to get to a garage.if thus is of help please vote thank you.
I am not positive about my answer but I figured I would give my feedback anyways. It is possible that your alternator might be going out. In my experience, I had a '95 Maxima where, as I was driving, the battery and brake light would come on for a second and then it would turn off. A couple of days later, I needed a jump start. After driving down the road and after the car shuts off on me again (even after the jump), I realized that I needed a new alternator. Sure enough, the alternator solved the problem.
Have it checked by a professional as soon as possible, airbag has a problem wich can be as simple as a short in the wiring or as harmful as the possibility of deploying airbags without any warning. Please take advice.
On a Nissan the brake light comes on with the battery light, to get owner to pay more attention. You need to check the charging system and belt tension. The way the light is coming on the belt may be loose or the alternator is starting to go bad. Once you check your charging system that will tell you what to do next. Just make sure the battery cables are clean and tight. Also be sure belt tension is correct, If these things are not done first the charging system test will give you false readings.