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Old 03-16-2015, 09:25 AM   #1
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Join Date: Dec 2014
Posts: 347
DP Won't Go! Problem and Solution

Maybe this is a new one.

I left Friday before dawn for a camping trip. We had the flat-bed trailer hooked up with our two quads tied down. I had everything prepared, so I got up, jumped in, and started driving.

Motorhome would not go more than ten miles-per-hour! No smoking, no rough engine, no weird gauges, just no go!

I made it about 1/2 mile, looked for the obvious as much as I could in the dark, and came home. (No flat tires, no cat stuck in the throttle cable, etc.) I went about trying to figure out what was wrong, saw the tail lights glowing, and thought I had left the motorhome lights on. I checked the dash, and the switch was off.

Turns out either the +12 volt supply on the trailer connection, or the battery in the breakaway box was feeding back into the motorhome and activating the exhaust brake, along with the lights.

I will be able to figure out the cause - it is either the connector on the motorhome, or the wiring on the trailer. What makes it fun it that I have used the trailer with two other vehicles with no problems, and have towed two cars and two other trailers with the motorhome with no problems.

Just be warned - if your DP won't go fast, it might not be the fuel filters!

Matt B

Matt B
1998 Monaco Windsor
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Old 03-16-2015, 10:41 AM   #2
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Location: Satsop WA
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Those are the kind of things that drive me crazy!
Glad you got it figured out.
2007 Alpine Limited SE
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