charge light on?

Question

i croosed my battery cables and since then my charge light on and lose of power has accured.i replaced the alternater and voltage reg,,,light still; on,,,now what??

78 toyota 2 wheel drive truck

Answer 1

What you do is get the Haynes Repair Manual for your Year and model of vehicle at Auto Zone, or another automotive repair shop. The manual will show you what and how to do the repairs.

Now you know you need to get the book and trace the wiring from alternator to starter. If you have a loose nut on cable on starter you can have a charging problem as this is in the path of charging. It is not straight from alternator to battery. You need a ohmeter or voltmeter to check for continuity. I presume that your cables are good. There is no white residue in the cable itself. Also, take the battery to an Automotive parts store for a free check. If you battery has a weak cell, it will not hold a charge, or take a charge from the altenator. Always remember, when you EVER change altenators the battery MUST be at a full charge. Prevents problems in your altenator later on. But if you have a bad battery, the light will go on. And if you do not have enough juice you can be driving and then the engine will stop. No juice from the battery. So you charge it up and it runs, then dies later is the battery. I know it has happened to me.

So check battery cables and clean posts. Then battery needs to be checked. Then if battery is OK, take your altenator out and have it checked. it won't be the first time that a customer got a bad altenator. Only once, at Auto Zone, did I get a bad starter.

Answer 2

Try deleting the codes set on your computer by disconnecting the negative battery cable for a couple minutes, then reconnecting it. That will reset the computer, and maybe that is the problem. At least it's the first thing I would try. It's free and easy to do. Always do the free and easy things first.

Answer 3

i own a repair shop,and it has more than likely blown a fusible link on it somewhere you have to start at where the wires connect to the starter and trace all of these until you find it ,this may be a time consuming job,but you,ll know it when you come to where its burnt in to,i hope you find it,good luck with it.