Resistor ??? or fusible link??
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Thread: Resistor ??? or fusible link??

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    Opeler caramiciu is on a distinguished road
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    Resistor ??? or fusible link??

    Hi ,
    I am doing the wiring on my 72 Opel Gt and I am a bit confused..
    The Destec schematic shows a fusible link between the starter solenoid and the fuse box

    In a different schematic , from Easy Wire, it shows a ballast resistor.

    What do I use
    Please enlighten me, it would be appreciated

    thanks

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    1000 Post Club Site Supporter My location P.J. Romano will become famous soon enough P.J. Romano's Avatar
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    It is fusible link. See the page from Opel service manual.
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    άber Genius My location First opel 1981 will become famous soon enough First opel 1981's Avatar
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    Fusible link.
    It's the main connection between the battery and the fuse box. It's the last line of defense if your car short circuits.
    If you ever lose complete loss of electricity in your car, and your battery connections are fine, it's likely this fusible link.

    I replaced mine with an actual replaceable fuse. When I got the car I found the fusible link blew and that's why the car had been sitting for 12 years. On Opel GTs it's really common for the headlight wires to get damaged and cause the fusible link to blow. This was the case with my current one.
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    άber OpelGT.com Moderator My location kwilford will become famous soon enough kwilford's Avatar
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    You seem to be asking a question about two different topics.

    The fusible link shown delivers power from the battery to the main fuse box, and conversely delivers charge from the alternator to the battery. As described, the fusible link (and the one off the alternator) is a sort of main fuse that protects in case of a major short circuit.

    A ballast resistor has a totally different role as it provides a reduced voltage to the coil to reduce ignition point arcing. There is no ballast resistor in a stock Opel, rather it uses a resistor wire. Without overloading this thread with unnecessary details, the resistor wire may be bypassed if a coil with an internal resistor is used, such as when buying a Pertronix Ignitor and companion coil. An Easy Wire schematic might work in a North American car, but it MUST be used carefully when wiring an Opel, as there are significant differences.

    HTH
    Keith Wilford
    If I could only find the time to work on my '71 Opel GT...

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    Opelitis since 1984 My location GoinManta is on a distinguished road GoinManta's Avatar
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    Yea.. the Easy Wiring diagrams have a few problems (Unless your talking about my diagram... at ez2wire.com then I will have to look at it).

    Ballast resistor is put inline between the fuse block and the (+) of the coil. I'm not sure it has anything to do with points. The high performance Accel or Mallory coils you can get at the local parts store require a Ballast Resistor. The use or lack there of has nothing to do with points, it has to do with the OHM rating of the Coil. A 1.5 OHM coil needs a Resistor, the 3.0 OHM coil does not need a resistor. Run a 1.5 OHM coil without a resistor and you will fry the coil. Maybe not in the short term but definately in the long term and ESPECIALLY if you leave the ignition hot without the motor running for any length of time.

    As for the fusible link at the starter or alternator, some of the Kwik Wire harnesses come with Mega Fuses instead. That way if you have a short, you pop a fuse and not burn a wire.
    Last edited by GoinManta; 04-10-2011 at 01:15 PM.
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    Quote Originally Posted by First opel 1981 View Post
    Fusible link.
    It's the main connection between the battery and the fuse box. It's the last line of defense if your car short circuits.
    If you ever lose complete loss of electricity in your car, and your battery connections are fine, it's likely this fusible link.

    I replaced mine with an actual replaceable fuse. When I got the car I found the fusible link blew and that's why the car had been sitting for 12 years. On Opel GTs it's really common for the headlight wires to get damaged and cause the fusible link to blow. This was the case with my current one.
    If I were to replace the fusible link with a fuse, what size fuse would be recommended?

    Allen

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    Just an old fart My location wrench459 will become famous soon enough wrench459's Avatar
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    Quote Originally Posted by saxybiker View Post
    If I were to replace the fusible link with a fuse, what size fuse would be recommended?

    Allen
    Allen
    1/3 of the peak current load over the rating.
    Now you got to remember that the fuse link is a slow blow.
    Have fun with this one.
    Black Horse

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