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Old 12-03-2007, 12:34 AM
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My 74 swinger eats ballast resistors!

This stupid car eats a ballast resistor every few days. I have checked for any bad grounds, loose wires, or bad connections and found none. I have a mysterious blue wire coming from my coil going no-where and I can identify where it should go. It hasnt been hooked up in three years and so far so good. The car has always eaten ballast resistors but not with this frequency. I searched the knowledge base and found no clues. Anyone familiar with the dodge ignition system that can help please do. Electricians are too expensive for me!

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Old 12-03-2007, 05:46 AM
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I did a quick google search and found a site I used to visit. Has some interesting facts/discussions about Chrysler ignitions. Read through it, maybe it'll help. Good luck.
Bill
http://www.imperialclub.com/Repair/Electrical/coil.htm
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Old 12-03-2007, 06:05 PM
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check voltage out put at alternator while running, idle and about 2000rpm, should not go above 14.6v, check that you have the correct resistor for the engine size, check that the resistor is bolted properly to the firewall and nothing is preventing air cooling.
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Old 12-03-2007, 11:21 PM
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It is the proper resistor. I checked it for resistance, and ofund i may have wired it backwards. I will post about my results. I need to track down some parts for this car now. ONly has 70k miles but starting to fall apart a bit. Trans is going and slight electrical gremlins. Needs a carb pretty bad, the top plate is warped and it leaks all over. I will let you know what i find tomorrow...Thanks for the tips guys.
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Old 12-04-2007, 12:40 AM
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What about your coil? There are 2 types, some use and external coil and others have internal resistors. Long shot here? Google Ramcharger Central, Allpar, and Mopar chat. Search the forums, the Ramcharger group is a knowledgeable bunch.
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Old 12-04-2007, 10:14 PM
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its got a thermal ballast resistor. I did in fact cross the wires. They are in unmarked connectors, on a ballast resistor with no apparent markings. I traced the leads using a wiring diagram in a haynes manual. one side of the ballast resistor provides a different resistance than the other side. I still have a mystery blue wire with pink trace on it coming from the coil. it goes no where and I cant find it in manuals. its a cali car with different smog stuff than normal darts. i will post pics of what we are discussing here for you guys to see. one day one of you guys will get stuck working with this stupid autolite ignition system. they have rev limiting switches run off of a ballast resistor, and other weird saftey stuff randomly wired into the charging/ignition harness. check back thursday I should have more.
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Old 12-05-2007, 01:06 PM
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Which module are you using? The 5 pin module goes with the double resistor. The 4 pin module goes with the 2 pin resistor. These are not interchangeable. This is covered in the Allpar chat forums.
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Old 12-09-2007, 08:42 PM
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I believe its the 5 pin. all parts were stock when i bought it a few years ago and I kept them to compare to. I think I solved the starting problem, but now the lights fade light and dark (pulse)slowly. Tested voltage regulator at autozone and its good. no clue what else could do it. all grounds and wires on right on the money.
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