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Old 09-01-2011, 04:49 PM   #1
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Join Date: Jul 2011
Posts: 1,109
My Labor Day Weekend Whatzit

I'm still in the exploratory stage of motorcoach ownership, having mine at home for only a week now.

Any idea what this is? I went looking for a fuse box under the driver's side dash and found this instead. It has a switch like you'd find on a generator and the word "Diag" typed on a label beneath the switch.

That cut yellow wire is a curiosity too.


2005 Newmar KSDP 3910
ISC on a Spartan
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Old 09-01-2011, 05:53 PM   #2
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Join Date: Apr 2011
Location: Powell River, B.C.
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The diag, button is to trigger the engine control module to down load codes through the covered plug in to a read out box.
Only one loose wire behind the dash . Consider yourself lucky.
Check it for power , ignition on and off, if it's not powered up leave it be. Trying to track it would only give you grey hair!

99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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Old 09-01-2011, 06:06 PM   #3
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Also forgot to mention, if your chassis wiring harness is like mine, you may find another one of the capped grey plug ins on a 7' coil of wire in the trans area. This extra diagnostic port is so a mechanic can be at the engine and get the read outs, without running the length of the coach. If you find the wire and plug, carefully run it to the rear of the coach; up the trans dipstick tube worked on mine; securing it all the way with zap straps. If you have the coach in for service this will save time.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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