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Old 12-06-2007, 03:00 PM   #1
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Hey, I was directed here from the Womens' Forum. I need a modulator for a 1974 Dodge Hall Grand Touring Coach to get the thing moving again. When I went to the auto parts store they said it could be one of two (four prong or five prong). Where should I look (without a manual) to find out which one I need? I understand they're fairly easy to replace. I certainly hope so.
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Old 12-06-2007, 03:00 PM   #2
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Hey, I was directed here from the Womens' Forum. I need a modulator for a 1974 Dodge Hall Grand Touring Coach to get the thing moving again. When I went to the auto parts store they said it could be one of two (four prong or five prong). Where should I look (without a manual) to find out which one I need? I understand they're fairly easy to replace. I certainly hope so.
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Old 12-06-2007, 08:16 PM   #3
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Is it also called something else? I'm sure I know the part, just not used to it being called that. What does it being bad cause your coach to do or not do? Having that may help to locate it as well.

Pictures are also very helpful, as we can use them as reference material to help you through this.

With that out of the way, WELCOME!! Yes this is where you belong, with the rest of us that still enjoy our older rigs. It does not have to be shiny and new to be beautiful to us. On that note, how about a few pictures of your rig just to share. You can find (probably way too much) about my rig in the 77 Overland thread, and Capn Dan has a link to pictures of his rig in his signature.
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Old 12-07-2007, 02:35 PM   #4
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Welcome here Bellever42, like SanjayR said. I have a idea that you are talking about the distributer modulator. If that is it, You will need to open the doghouse if it is a ClassA motorhome. You will have to remove the distributer cap and th rotor button and count the wires in the plug for the modulator. That will tell you if its a four or five wire model. Hope that helps,
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Old 12-08-2007, 06:24 AM   #5
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Thank you for such a warm welcome, and your advice. Unfortunately, I'm readying the coach for sale.
The problem I have is that the rig wont start. Distributor modulator sounds like a good place to start.
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Old 12-09-2007, 02:23 AM   #6
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Believer42:
Thank you for such a warm welcome, and your advice. Unfortunately, I'm readying the coach for sale.
The problem I have is that the rig wont start. Distributor modulator sounds like a good place to start. </div></BLOCKQUOTE>

Are we talking about a vacume modulator which is a transmission part or an ignition control module? How did we arrive at the conclusion that this is the problem?

On a 74 Dodge the chances that the distributor cap and rotor needs replacement or the hall effect pickup in the distributor needs to be cleaned or replaced is also a possibility. Balast resistors were also used in that time frame and when they fail will cause starting problems too.

More info please on how this was diagnosed.
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