Need IDM Info
Postmaster
Joined: Nov 2005
Posts: 3,168
Likes: 10
From: San Ramon Ca.
99.5-2003 haved the 120 volt IDM IIRC. I got my spare out of an early 99 (or so the guy said) and it is a 110 volt. I've seen a few good deals on IDMs on ebay of late. I'm sending the spare to Swamps for there mods. Chase (Superduty4X4) might know for sure. He had an early 99.
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Postmaster
Joined: Jun 2007
Posts: 2,795
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From: Rogue River, OR
Well William, you are right I could have done that but I am short on time and I am looking for a specific, factual answer not a thought or guess as you have given. That said, thank you for your analysis and input. 
Rog
Rog
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Joined: Jul 2003
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From: Newport, WA
As I understand OBS had 90 or 100v IDM. Early 99 SD had 110v IDM. Late 99-03 SD had 120v IDM. These are the facts as I know them. Whether or not they are correct or not remains to be determined 