Intermountain F7 Decoder Question

[DocGeoff]

So I got a F7 and a DN163l13. Following the instructions I removed the leads for the headlight and re-installed them on the decoder. I programmed the decoder and the lights worked fine and the engine ran beautifully. BUT!!! When I turned off the headlights the F7 took off at light speed and would not stop even with emergency stop of the DT400? The lights stay on constantly and obviously I can't turn them off or "away we go"??? I assume I got something wrong. The wires are on the correct side, and it doesn't appear they are touching or there is solder touching any other pad???
The above doesn't mean I can't see it even under magnification. It is a tiny son-of-a-gun to work with....
Suggestions? Fixes? help???

[mmyers]

First check would be for continuity between each of the light connections and the frame halves. There should be none. Possibly some insulation melted on a wire and it is contacting the frame. Apply some downward pressure on each wire to check properly as the shell will be off.

Martin Myers

[kiwi_al]

Have a read  it may be helpful.

http://forum.atlasrr.com/forum/topic.asp?TOPIC_ID=39613

There's a link halfway down about runaways