Question about Mazda B-Series Truck

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I think my 1986 mazda b2000 has a short, but I don't know where. the alternator tests fine. It only happens when my headlights are on and usually when I hit the turn signal. It has happenned before and then went away: i don't know what I did to fix it the first time. It was fine for months then started acting up again.

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  • cabickel21 Oct 30, 2008

    when I have my head lights on it drains the battery quick and if I hit the turn signal or brakes it draws enough juice to kill power to the radio. once I get the car started it will stay running but I have not driven more than 10 or 15 miles since it started doing it. the lights will grow dimmer and dimmer while I am driving. then when I kill the engine the lights are brighter but it won't start again wihtout a jump. also my oil warning light has been on steady for over a month even though my oil level is fine.

    please give me any sugestions.

  • cabickel21 Oct 31, 2008

    Thanks for the help. I finally fixed it today. the altornator still tested ok. I took a closer look at the wires and found the one of the plastic connectors had broke. I clipped the wire and put on a new connector and it fixed everything, even the oil light went out! thanks again.

  • tony yeatman
    tony yeatman May 11, 2010

    What happens?



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It certainly sounds like an alternator problem.The alternator no longer has the ability to produce enough power to charge the battery and run the electrics in the vehicle so the battery is being drained .Change the alternator and the electrical problem will go away.As to the oil sensor it may also need replacing unless the wire to the sensor has fallen off or earthed out on the body.If you have a multi meter you can personaly check both components.The alternator should produce 13v to14.5v .Not sure what range the oil sensor in your vehicle runs at but you should get and test in ohms resistance.Usualy you will get no signal at all if it requires replacement.good luck and let me know how you go.

Posted on Oct 31, 2008


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