A friend of mine owns a 1989 Tacoma 4 wheel drive pickup. Something is wrong in the battery circuit. Sometimes when you start it up it shows that its not charging and its not, and then drive for a while and it will start charging. Happens at night and the lights will eventually almost be out then something happens and it will start charging. Is there a relay in the charging circuit that could be bad or what is in the circuit that could cause this.....Thanks in advance........

Have the alternator checked, it probably has an intermittent problem. No relay in the charging circuit.

Clifton

Check all the connections to make sure they are secure and corrosion free.