Manta/Ascona Pertronix Simple-Hookup Switched-12V Source.
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Thread: Manta/Ascona Pertronix Simple-Hookup Switched-12V Source.

  1. #1
    Cunning Linguist Site Supporter tekenaar's Avatar
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    LightbulbManta/Ascona Pertronix Simple-Hookup Switched-12V Source.

    Been using this for several years now, so I thought I'd share. It's simple, direct and doesn't require additional long wire runs. Another plus is that it can be made very stealthy, i.e. "stock looking", without much effort. Here's the trick . . .

    . . . get a male and mating female 'bullet' connector, cut the eye connector off the Pertronix red wire lead and strip enough off the end for either bullet connector, insert and crimp. Then, just strip a bit of the insulation off the horn's switched 12V wire, (LILAC), about 1/2" should do it, double it over and insert into the remaining bullet connector and crimp. Insert the male bullet connector into its female counterpart and you're done . . . like this below . . .



    1960: '61 Rekord PII 1.7 3S 3.9 '69 Kadett LS 'sprint' 1.9 3A 3.18
    1970: '70 GT 1.9 4S 3.44 '72 GT 2.2SSD 5S 3.44 '72 GT 2.4FI 5S 3.44P
    1970: '73 GT 1.9FI 4S 3.44 '75 1900 1.9FI 4S 3.44
    1980: '85 Bitter SC 3.9FI 5S 3.44P
    2000: '09 Solstice GXP Coupe 2.0 SIDI VVT "Stage 2" Turbo 5S 3.73P


    "De inimico non tantum loquaris male, sed cogites."

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    Opeler dcm013's Avatar
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    Or you can go to Radio Shack and buy a pack of connectors that include single female to double male spade connectors so you can use the existing horn wire/connector and replace the ring connector on the Pertronix with a female spade. Then the original horn wire is left unmolested.
    wrench459 (R.I.P.) likes this.

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    3000 Post Club blancojp (R.I.P.)'s Avatar
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    This method is interesting however I would not do it.

    The Pertronix is made to hook up to a coil +/- terminals, as the instructions tells you. And though a power supply is a power supply, the horn has about 14V when the engine is running and the coil does not. You also lose the benefit of the resistor wire and most all, it just looks like a botched up job which is very far from being stealthy.

    The best method is to follow the instructions on the box.
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    Cunning Linguist Site Supporter tekenaar's Avatar
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    QuestionInteresting, Juan . . .

    Quote Originally Posted by blancojp View Post
    This method is interesting however I would not do it.

    The Pertronix is made to hook up to a coil +/- terminals, as the instructions tells you. And though a power supply is a power supply, the horn has about 14V when the engine is running and the coil does not. You also lose the benefit of the resistor wire and most all, it just looks like a botched up job which is very far from being stealthy.

    The best method is to follow the instructions on the box.
    . . . I haven't bought any Opels recently and haven't installed a new Pertronix unit lately. Whereas Pertronix used to tell you to hook their unit's red wire directly to a switched +12V source, not the coil's + side, evidently their instructions have changed.

    I would submit to you that the Pertronix red wire should be connected directly to a switched +12V source when converting a stock, resistor-wire coil Opel ignition system however. The coil + side sees the full +12V only during start and ~+9V with the engine running, which is my point . . . unit is designed for running on +12V (in reality 14+V when engine is running!)

    That said, however, I've been running my '75 Ascona's unit exactly as described in my first post for about 10 years now . . . never any hint of a problem. All of my Pertronix units have been wired like this since 1978, when they were Perlux!

    Last edited by tekenaar; 10-31-2019 at 02:49 AM. Reason: Restore embedded image


    1960: '61 Rekord PII 1.7 3S 3.9 '69 Kadett LS 'sprint' 1.9 3A 3.18
    1970: '70 GT 1.9 4S 3.44 '72 GT 2.2SSD 5S 3.44 '72 GT 2.4FI 5S 3.44P
    1970: '73 GT 1.9FI 4S 3.44 '75 1900 1.9FI 4S 3.44
    1980: '85 Bitter SC 3.9FI 5S 3.44P
    2000: '09 Solstice GXP Coupe 2.0 SIDI VVT "Stage 2" Turbo 5S 3.73P


    "De inimico non tantum loquaris male, sed cogites."

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    3000 Post Club blancojp (R.I.P.)'s Avatar
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    Quote Originally Posted by tekenaar View Post
    . . . I haven't bought any Opels recently and haven't installed a new Pertronix unit lately. Whereas Pertronix used to tell you to hook their unit's red wire directly to a switched +12V source, not the coil's + side, evidently their instructions have changed.

    I would submit to you that the Pertronix red wire should be connected directly to a switched +12V source when converting a stock, resistor-wire coil Opel ignition system however. The coil + side sees the full +12V only during start and ~+9V with the engine running, which is my point . . . unit is designed for running on +12V (in reality 14+V when engine is running!)

    That said, however, I've been running my '75 Ascona's unit exactly as described in my first post for about 10 years now . . . never any hint of a problem. All of my Pertronix units have been wired like this since 1978, when they were Perlux!

    Perhaps this would share some light.....

    http://www.pertronix.com/support/man...itor12vneg.pdf
    Last edited by tekenaar; 10-31-2019 at 02:50 AM.
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    Some Pertronix Specs

    Pertronix Specifications
    •Operating Voltage: 8-V to 16-V DC
    •Temperature Range: -50 to 300F
    •RPM Range: 0 to 15,000 RPM
    •12-V NEG Ground (some 6-V NEG, 6 & 12-V POS ground kits available)


    Harold

    P.S. For those that like to 'toot' their own horns, I wonder how much voltage drops when using the horn?
    Last edited by tekenaar; 05-08-2012 at 05:27 PM. Reason: Title: Petronix?

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    7,000 Post Club wrench459 (R.I.P.)'s Avatar
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    Quote Originally Posted by hrcollinsjr View Post

    P.S. For those that like to 'toot' their own horns, I wonder how much voltage drops when using the horn?
    Toot Toot this sounds like fun.
    Current draw 02 durango horn.


    Last edited by wrench459 (R.I.P.); 05-07-2012 at 04:53 PM.

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    My air horn in my car draws 18 amps!
    Last edited by RallyBob; 05-07-2012 at 06:37 PM.
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    Low Voltage Problem

    http://www.pertronix.com/support/man...itor12vneg.pdf
    Q. How to correct a low voltage problem?
    A. First, if you have an external ballast resistor, connect the red Ignitor™ wire to the ignition wire prior to the ballast resistor.
    B. Second, if you do not have a ballast resistor you must locate a 12 volt source that is controlled by the ignition switch to connect the red Ignitor™ wire to.

    Last edited by tekenaar; 05-19-2012 at 01:57 PM.

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    Opel horn waveforms

    First off only one horn was working tonight and the battery voltage was low.

    One horn current ramp.


    The voltage drop on the postive side. Scope is set the same as Otto's setup.
    HC I told you that is was a little dirty.



    And as a bonus... battery charger waveform.


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    Opel Key Master opelspyder's Avatar
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    Quote Originally Posted by blancojp View Post
    This method is interesting however I would not do it.

    The Pertronix is made to hook up to a coil +/- terminals, as the instructions tells you. And though a power supply is a power supply, the horn has about 14V when the engine is running and the coil does not. You also lose the benefit of the resistor wire and most all, it just looks like a botched up job which is very far from being stealthy.

    The best method is to follow the instructions on the box.
    Even when running the 12v wire to the Pertronix...it has the potential for 14v...like all the 12v system, which actually is designed to withstand 16v, bulbs and all. While they do run off the resistance wire...many members have had issues running theirs with the resistance...so 12v source fixed there problem. Otto's way is the same as running a separate wire...but I don't like splicing into wires like that either.
    Last edited by tekenaar; 05-19-2012 at 01:21 PM.
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    Member opeljohn's Avatar
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    What number fuse off the fuse block would be best in the 75 1900/Ascona. I have a stock coil with the red wire for my petronix running from it right now. Seems to run okay but maybe could be better. May try Ottos way but what the heck I have plenty of red wire.

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