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Help finding DDEC diagnostic port
I am looking for the DDEC diagnostic port on my 1998 Marathon XL (1997 chassis). Broader Internet searches suggest many places to look but I was wondering if anyone here could decisively tell me where to find it around the driver’s seat area?
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5 Replies
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On My 95 XL it’s on left side of seat on panel that the park brake set/release and tag lift valve. with grey screw on cap.
Glenn
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As stated above it should be to the left of the driver’s seat, and on some coaches under the dash, LH side.
There is also one at the rear under the electric box.
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Thanks everyone. I think I found it! Behind the seat, as directed. I am posting pics in case this question is searched on again.
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That’s it.
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I’m embarrassed by the dust in those pics I posted. Time to clean more!
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