Car Batteries
Headlights Tail and Brake Lights
Dashboard Lights and Gauges

Why might the brake and battery warning lights stay on past 2500 RPM?


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2009-07-26 00:37:08
2009-07-26 00:37:08

Sounds like the alternater is on it's way. I will add something to this. I messed with a couple of alternator replacements but the last time the warning lights started coming on, I pulled the plug out of the alternator and gave the contacts a good cleaning both on the wiring harness plug and the socket of the alternator. You don't have to pull the alt to do this (at least on the '90s pickup) although it is hard to get that dude out of there. Anyway, no more problems. Actually, I have found on Toyota and Nissan both that anytime a warning light comes on it is very prudent to disconnect the suspected part (sensor, sender etc.) and make sure those contacts are clean. This has saved me buying and replacing a Nissan alt, a Toyota A/C compressor and a couple of O2 sensors on my personal vehicles and the advice has saved a few friends some expensive repairs too. Definitely worth the cost of some contact cleaner from Radio Shack or the parts store and the little labor to disconnect and clean the connectors.


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Most of the light on the dashboard are Warning Lights; different warning lights that might flash up on the dashboard. Some of the more common warning lights are shown below. 1 = Oil pressure warning light 2 = Battery charge warning light 3 = Brake system warning light 4 = Engine warning light

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If the car/truck is running, it will not make a difference. However, if there was an electrical short on one of the wires that leads back to the brake lights, it might slowly draw power while the engine is off.

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on the brake pedal under the dash is a brake light switch. that when you depress the brake it turns your lights on. you might wanna check that

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the plug behind the battery might be unplugged or that same plug is disconnected from the fuse box

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