Charge and brake light on still after replacing alternator & voltage regulator

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boranederek
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My tercel:: 1984 Toyota Tercel Wagon (Standard)

Charge and brake light on still after replacing alternator & voltage regulator

Post by boranederek »

Hi so I own a 84 Tercel wagon and the brake and charge light are on after I have changed the alternator and voltage regulator and even fuses, I’m thinking it’s a wiring issue but anyone else have ideas of what it can be or have had the same problem and knows how to fix it!
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NWMO
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Re: Charge and brake light on still after replacing alternator & voltage regulator

Post by NWMO »

BD,

Oddly enough, it may just be low brake fluid.

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boranederek
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My tercel:: 1984 Toyota Tercel Wagon (Standard)

Re: Charge and brake light on still after replacing alternator & voltage regulator

Post by boranederek »

NWMO wrote: Tue Sep 20, 2022 2:34 pm BD,

Oddly enough, it may just be low brake fluid.

Chris

I’ve checked and it’s full.
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dlb
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Re: Charge and brake light on still after replacing alternator & voltage regulator

Post by dlb »

welcome, boranederek. The charge and brake lights being on usually does indicate a problem with the alternator -- I assume you have double checked all the connections to make sure they are all secure? The belt is snug? My next guess after those would be a bad-out-of-the-box alternator or voltage regulator.
boranederek
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Joined: Tue Sep 20, 2022 10:15 am
My tercel:: 1984 Toyota Tercel Wagon (Standard)

Re: Charge and brake light on still after replacing alternator & voltage regulator

Post by boranederek »

dlb wrote: Tue Sep 20, 2022 4:09 pm welcome, boranederek. The charge and brake lights being on usually does indicate a problem with the alternator -- I assume you have double checked all the connections to make sure they are all secure? The belt is snug? My next guess after those would be a bad-out-of-the-box alternator or voltage regulator.
I’ve already checked all of this too. My girlfriends dad is the one whom helps me
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Mark
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My tercel:: 1984 Automatic, 1981 sedan
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Re: Charge and brake light on still after replacing alternator & voltage regulator

Post by Mark »

I'd do a voltage check. Check the voltage on the battery when the car is shut off. It should be 12.8V or so. Then start the car and the voltage should jump to close to 14V. If it does that, the alternator is probably fine and it's probably a broken wire or corroded contacts in a wiring connection. If so, you could try wiggling the wiring and see if the lights go out.
xirdneh
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My tercel:: 87 tercel 4x4 wagon w/reringed engine, 83 tercel 4x4 wagon w/salvaged engine and 4.1 Diff's
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Re: Charge and brake light on still after replacing alternator & voltage regulator

Post by xirdneh »

Though not quite the same it may be worth mentioning
I once installed an external regulator alternator in an internal regulator car.
It was an accident but the plug did plug in even though it was different.
Took a while to figure out what i did
Love those Tercell 4x4 wagons but they sure suffer from road noise.
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