1998 Saturn SW2

Discussion in 'Saturn S-series' started by Kevin Tillotson, Jul 7, 2003.

  1. My wife left the lights on the other day and discharged the battery.
    After several unsuccessfull attempts to jump start the vehicle, I proceeded
    to buy a new battery. The car started right up and was fine for a day or
    so. Then the battery was dead again. Thinking it was the alternator, I
    bought a new one. Before I put the new one in, I tested the alternator
    wires and gave the vehicle a final once over. I found what appeared to be
    the problem. The fuseable wire between the starter and the alternator was

    So I had the old alternator tested and it was producing around 14
    volts. I returned the new alternator, reinstalled the old one and put in a
    wire with a 30 amp fuse, between the alternator and the starter. Thinking I
    had found the problem, I started the car. All was working fine, but there
    was no power going from the alternator to the battery. In fact the voltage
    in the battery was decreasing.

    Does anyone know what might be the problem? It's a fairly simple
    circuit and I have already tested the wires and there is voltage coming from
    the battery through them, when the key is turned on. Also, what is the
    amperage on the fuseable wire? I called the local Saturn dealership and
    they could not tell me what the amps were. But they were willing to sell me

    Any thoughts would be much appreciated.

    Kevin Tillotson, Jul 7, 2003
  2. Sounds like you have a short in the circuit. Fuses don't just blow. You
    haven't located the problem yet. To blow a fuse you have to apply more amps
    to the circuit than the fuse can handle. You have to find the reason the
    fuse blew. Usually this is caused from a "short" which means somewhere in
    your circuit you have power touching ground. Don't forget the car chassis is
    ground so anywhere you have a bare wire or a loose wire it could be touching
    something that is grounded. I would check the connections on the starter &
    alternator. When disconnecting the battery, make sure that you always remove
    the ground first. Vise versa when reconnecting. Make sure you connect the
    positive first then the ground.

    I love it when people find a blown fuse, then replace it thinking they fixed
    the problem. Don't people understand what a fuse does????? The fuse is
    protecting the wires from high amperage. Without a fuse, you would have just
    melted the wire and probably just torched your car. If a fuse blows find the
    problem and fix it.
    Kenneth White, Jul 8, 2003
  3. Did you check that 30 amp fuse? It probably blew. That's nowhere near
    enough, the alternator can put out up to 90-100 amps on many models.
    Robert Hancock, Jul 8, 2003
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