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Old 06-07-2017, 05:18 AM   #1
mrscullini
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Default cooked pertronix??? prestolite distributor

'79 scoutII, 345 with prestolite distributor with recent pertronix upgrade.

On the battery, I installed quick release terminals, the vehicle sits a lot so I remove the terminals so the batter doesn't drain. It has worked great. Downside is, when I do connect the battery terminals I don't always get a good connection. So when I try to start, I'll get a small arc on the pos terminal. I'll pull the terminal off, clean the carbon with scotch brite and reconnect. This sometimes happens multiple times before it finally starts. I know, the quick release terminals are junk.

Anyway, yesterday, this happened and now no start. I've got fuel, the thing cranks and cranks. Could that momentary arc on the battery cook a pertronix module? Is there a simple resistance test I can do on the module?
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Old 06-07-2017, 05:31 AM   #2
ihpartsjeff
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Default Re: cooked pertronix??? prestolite distributor

I like to forward customers with these questions to the manufacturers website as they will have detailed information for diagnostic repairs. Here is a link to Pertronix's website that deals in diagnostics - Pertronix Troubleshooting Tips (Ignitor)
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Old 06-07-2017, 05:39 AM   #3
mrscullini
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Default Re: cooked pertronix??? prestolite distributor

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Originally Posted by ihpartsjeff View Post
I like to forward customers with these questions to the manufacturers website as they will have detailed information for diagnostic repairs. Here is a link to Pertronix's website that deals in diagnostics - Pertronix Troubleshooting Tips (Ignitor)
Thanks Jeff. I'll send them an email.
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Old 06-07-2017, 05:58 AM   #4
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Default Re: cooked pertronix??? prestolite distributor

I didn't mean to send you away, of course either myself or one of our awesome tech moderators will be glad to walk you thru any procedures. I just find certain companies already have real good flow charts on diagnosing their parts and Pertronix is one of them hence the link I provided that should have answered your initial problem.
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Old 06-07-2017, 06:05 AM   #5
mrscullini
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Default Re: cooked pertronix??? prestolite distributor

Quote:
Originally Posted by ihpartsjeff View Post
I didn't mean to send you away, of course either myself or one of our awesome tech moderators will be glad to walk you thru any procedures. I just find certain companies already have real good flow charts on diagnosing their parts and Pertronix is one of them hence the link I provided that should have answered your initial problem.
No worries, didn't think you were shuffling me along.

I did check their site before posting here, however, didn't see anything specific to this.

I have a pretty good feeling I cooked the module, just want to get some confirmation before I drop 90 bucks on a new one.
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Old 06-07-2017, 06:38 PM   #6
Scoutboy74
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Default Re: cooked pertronix??? prestolite distributor

Is this a Gen I or a later module? Yeah, you really need to do something different with your battery terminal connections. They need to be rock solid. I suggest a Perko switch.

Check for voltage at your coil POS terminal with IGN switch ON. If you don't have power there, you have an issue upstream of the module. If you do have power there, remove one spark plug wire boot of your chose, slide the boot back to expose the brass contact, position it roughly 3/8ths of an inch from chassis ground where you can watch it and have a helper buzz your starter. A spark sufficient to ignite the air fuel mix in the chamber will easily jump that air gap to ground. Low light situations will aid in seeing the spark.
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