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Old 09-11-2012, 02:10 PM   #1
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Question 1979 Minnie Winnie no spark

Hello all,I am new here. I recently acquired a 1979 Minnie Winnie bunkhouse with a Dodge 360/auto trans. Everything looks pretty good: clean fluids, new battery, battery terminals, and coil. I cleaned up some frayed wiring and have traced power to the coil. The grounds look good. But I can not get a spark from the coil to the distributor.
The rig was running last about three years ago. Does anyone have any suggestions as to why there is no spark? Could it be a sensor or something in the transmission that thinks it not in park?


I have not been able to find a service or repair manual yet and am guessing at this point.
Thanks
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Old 09-11-2012, 04:55 PM   #2
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1978-1979 Dodge Motor Home Repair Shop Manual Motorhome | eBay
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Old 09-11-2012, 05:07 PM   #3
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Also, it cranks but no spark? Test the coil

Coil Test - Testing Your Ignition Coil - Coil Resistance Test - How To Test Your Ignition Coil With an Ohmeter
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Old 09-11-2012, 05:07 PM   #4
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Very cool. Thanks. That's a great starting point for my issue.
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Old 09-11-2012, 05:15 PM   #5
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I got the same result with old coil as I do with a new one. I will test the coil just to be sure. But, it seems unlikely. It cranks fine. I'm getting plenty voltage to the coil. I followed the negative wire leading from it and it shows voltage coming through. Tried new plug wires. I left it off the distributor end to check for a spark over a gap of about a quarter inch. Nothing. Keep the suggestions coming. Thanks.
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Old 09-11-2012, 05:17 PM   #6
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Hmm... Rotor... cap - how do they look?
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Old 09-11-2012, 05:19 PM   #7
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Or, what about the cable from the coil to the distributor?
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Old 09-11-2012, 06:03 PM   #8
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Yep, replaced that too. I tried the new wire as well as the old. No spark. It seems like it should work then doesn't. That's why I was speculating that it could be something else like a sensor or a kill switch.
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Old 09-11-2012, 06:06 PM   #9
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The rotor looks great actually. But, still no spark before the rotor.
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Old 09-11-2012, 06:41 PM   #10
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I'm out of ideas for the moment. You have a new coil, new wire, juice going in but nothing coming out.... a kill switch I think would not even allow it to turn over, as far as a Dodge specific sensor, I dunno.

There's always the manual on Ebay
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Old 09-11-2012, 07:13 PM   #11
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I'm going to get the manual. Gonna need it anyway. I'm also out of ideas for the moment. I'll test the coil(s). I was also considering wiring the coil straight to the battery, bypassing the ignition. That has to spark. Right?
Again, thanks for helping.
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Old 09-11-2012, 08:09 PM   #12
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no spark

imho jumping battery power to the coil will not work you say there is 12v to the coil which it should be to create a spark you need to create a path to ground from one of the small wires that connect to the coil. the parts that i think you need to look at the ingnition control box the balast resistor and the pickup coil in the destributor. you can bypass the resistor to check it. the outher 2 the only way i know to check them is to replace them lee
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Old 09-11-2012, 09:48 PM   #13
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Quote:
Originally Posted by hometool
imho jumping battery power to the coil will not work you say there is 12v to the coil which it should be to create a spark you need to create a path to ground from one of the small wires that connect to the coil. the parts that i think you need to look at the ingnition control box the balast resistor and the pickup coil in the destributor. you can bypass the resistor to check it. the outher 2 the only way i know to check them is to replace them lee
Good advice. I'll be looking into everything possible to get her going. Thanks.
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Old 09-12-2012, 12:06 AM   #14
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does this vehicle have a condenser? if it does, that's the next possible place for a problem. just hang a test light off the coil to ground. You should see it flash while cranking.
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