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Have alternator drive belt checked could be loose.if all is good alternator voltage regulator failing have alternator checked out at a garage or lexus dealership.
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1. The battery warning. This is indicative of a weak battery and if your battery is 3 years old or more I would replace it.
2. If you have a weak battery this can trigger other warning lights in the vehicle, typically the ABS warning but sometimes other warning lights as well depending on the electronic features in the car. If you replace the battery this should correct the battery warning and most likely the ABS warning if both of these warnings appeared at the same time.
Normally, once the ABS warning is displayed the anti lock braking system(ABS) will be shut down. Whilst your braking will be normal, if you brake too hard and lock up your wheels on a slippery road there is no ABS assist to prevent the brake lock up which you have when the system is working.
3. If the alternator on the engine is not generating sufficient power and thus not charging the battery at all, or very little, you will likely get a battery warning light. I don't know if your 1999 vehicle has a warning light to indicate a faulty alternator or not.
4. Check Engine Light.
You suggested the CE warning has been showing up for a few days and before the battery and ABS warnings popped up.
The CE warning can be caused by dozens of different engine issues.
The vehicle needs to be scanned with the appropriate scan tool to see what fault codes the onboard computer is generating because if you have a CE warning light there will be fault codes generated 99% of the time.
Once these fault codes have been pulled the mechanic can start to diagnose the cause of the problem or problems. Each engine fault code your car's computer is generating can be caused by different types of problems so it is important that they diagnose the issues correctly. Otherwise your Check Engine light will remain on as long as the causes are not identified and fixed.
I would say the battery warning light is in fact on, and the alternator is not charging the battery. Problem could be the alternator, or something in the circuit between the alternator and the battery. Usually a faulty battery will not turn the warning light on but I would have the battery tested anyway.
For some reason the brake warning light and battery light are connected, so either system could be having problems. The battery warning light could mean the battery is not being charged, and the brake warning light could mean you are low on brake fluid. I would start with the check engine light and see what the codes are.
Check for bad connection to the battery. Use a volt meter to check voltage from alternator to the battery, should be 14.5 volts to 15 volts. If you have anything less than that then look for a bad alternator wire from alternator to battery. Also check for a good ground connection to the battery. Do all the testing with everything off inside the car so you will not have a power drain from the system. hope this will help you.
hi this could be one of a couple of problems the first could be that the alternator isnt charging the battery properly unless you get the revs up then the lights go off. This is the usual problem The second problem would be a bad earth that comes from the battery if this is the case then removing the earth wire where it comes from the battery and goes to the engine or chassis and then clean behind where this earth touches the chassis or the engine use something like sand paper to remove any corrosion then put the earth wires back on then check if you still have the problem.
Is the brake and battery warning light just one light or is their a light for the brake warning light and a seperate warning light for the battery.
As you say when you apply the brakes or signal these lights come back on then it is going to be a voltage problem it could even be that the battery needs replacing this will need to be tested.
The first thing you should do is get the battery and alternator tested as one of these or even both is often the cause of the problem you are having.
Let me know how you get on or if you have any problems or questions just give me a shout back ok
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