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post #1 of (permalink) Old 12-21-2000, 06:28 PM Thread Starter
I Might Just Know What I'm Talking About
 
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Resister in Centech harness?

My body swap is winding down, and I need to complete the wire harness install. I have a concern with the resistor that comes with my new harness. The original didn't have a resistor. And reading the instructions, it just seems like an add-on. The ceramic "insulator" seems fragile. Can I just remove the resistor and wire the wires together? There is nothing special about my Jeep as far as the Jeep knows, it's all factory.
I have no idea what the purpose of the resistor is. And I've always been a little electrically challenged. Any advice on what to do? Is it as fragile as it seems? Can I eliminate it?

Any help? Opinions welcome......



DREW
IN2DEEP <font color=red>78 CJ5</font color=red> <font color=blue>302 FORD </font color=blue> [img]/wwwthreads_images/icons/shocked.gif[/img] <font color=red> T176/D300 REAR ARB 35" BFGS </font color=red>
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post #2 of (permalink) Old 12-21-2000, 09:17 PM
cj7jeep
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Re: Resister in Centech harness?

I believe you are talking about the ballast resister. I am sure someone will give a more accurate reply than this. You do not want to bypass this with your stock ignition. I believe it drops the volts to around 9, instead of 12, so while cranking the motor you don't put to much juice through the coil and burn it or something else up. This info is not exact, but in the ball park. If you have a Chevy HEI ingnition or similar, i think you remove the ballast and let the full 12 volts run on through. Someone will correct my mistakes.

post #3 of (permalink) Old 12-22-2000, 06:30 PM Thread Starter
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Re: Resister in Centech harness?

Just pushing it to the top..... looking for more responses....

DREW
IN2DEEP <font color=red>78 CJ5</font color=red> <font color=blue>302 FORD </font color=blue> [img]/wwwthreads_images/icons/shocked.gif[/img] <font color=red> T176/D300 REAR ARB 35" BFGS </font color=red>
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post #4 of (permalink) Old 12-22-2000, 09:46 PM
cj7jeep
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Re: Resister in Centech harness?

IN2DEEP i really thought you would get more replies. You can call Centech, they gave me really good tech support when i replaced mine.

post #5 of (permalink) Old 12-23-2000, 07:55 AM
 
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Re: Resister in Centech harness?

OK, Here is the Rub, Bub....
You DO need a resistor on your new harness for the '78 ignition.
The only exception is if you are using a MSD module INSTEAD of the factory module.
(If you are using the factory module, AND the MSD module, (smog set up) you still need the resistor.)

Ceramic 'Ballist' resistors (a misnomer, ballist suggests that is is there to balance someting, and it is not.
In this case, it works more like a restriction to slow things down a bit....)
Ceramic resistors are notorous for letting moisture into the resistor materal, and going bad, but they are cheap to replace, and easy to install.

I recommend SPLICING into (Not cutting the wire) the coil power wire and adding a Ford style Resistor Wire.
You will need a full 12 Volts from the ignition to run the stock DuraSpark Module, and you will need the resistor wire to power the coil, and this sloution gives you both.
The orignal wire powers the module with a full 12 volts from the key switch, and the coil gets the proper resistance via the resistor wire.

This is the way your stock wiring harness was set up, and it's the best way to do your new harness.
Very reliable, cost around $10 for the resistor wire. AutoZone part #

THE MODULE ALWAYS GETS A FULL 12 VOLTS.
Don't let anyone tell you it gets resisted power, or you will be changing a lot of modules....

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post #6 of (permalink) Old 12-23-2000, 08:38 AM Thread Starter
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Re: Resister in Centech harness?

OK TR, thanks for your imput. But just to double check. I realize you don't know exactly how my new harness is wired. But it seems like you are telling me to replace the Centech ballist resistor with the Autozone/Ford resistor wire. This seems to make sense to me.... I need to double check how my new harness is wired, but this seems logical to me.

Thanks again.

DREW
IN2DEEP <font color=red>78 CJ5</font color=red> <font color=blue>302 FORD </font color=blue> [img]/wwwthreads_images/icons/shocked.gif[/img] <font color=red> T176/D300 REAR ARB 35" BFGS </font color=red>
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