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!
1998 Monaco Windsor