I have a 91 previa and the battery light came on

Question edited for clarity.
Question moved to model Category.

If it cranks, it _does_ turn over. You are cranking but not firing or starting.

Does your vehicle have an anti-theft alarm and immobilizer? Is the battery light on, or is it the anti-theft light? If so, it needs to be reset when you disconnect the battery. It sounds like you have a battery issue, or a battery charging issue. Your best bet is a mobile auto-electrician with a pro grade scan tool computer to correctly diagnose.

The link is inconclusive regarding an immobilizer, but I bet it has one.

https://www.google.com/search?q=1991+toyota+previa+reset+security

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Hi

Yes it sounds like the alternator voltage regulator is wearing down and needs to be changed or replaced.

If you can get your hands on a 12 volt multimeter, turn the setting to 20 dc and place the negative wire on the negative battery post and the positive wire on the positive battery post.


The battery with motor off should be 12.6 volts and higher, start the the car the read out should be 14.,2 or higher.


You can turn the lights and heater on to see if the alternator can cope with the load.


if read out is less then you need to change or replace it.

Cheers

It's the same fuse that runs your tail lights. If the plate light isn't working, you probably have a broken wire near the back, or a faulty bulb. Get a wire circuit tester and locate the wire. Check for power at the bulb socket, and if no power, keep making your way back on the wire until you find power, or a broken wire.

hola, porque el toyota previa 91, tiene un tanque enfrente que al parecer es para el aceite de motor. pero bajo el aciento tiene otro que tambien indica aceite de motor. nadie me despeja esa duda y el tanque esta seco, pero el nivel de aceite de abajo me marca correcto. que hago? ayudenmeeee!

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the alterator relay is not ingageing you need to have it replace see when it cool down it started back up the relay became un hooked dont for get to diconect the batteri cables first hope this helps

Did you try to Jump start it?
If you did and wouldn't start I would Check your starter.

you need to replace the fuel sock in the tank and the fuel filte and do a tuneup wires plugs and cap.