[#oops]how do you start a new thread?
I am going to go out on a limb here and speculate as to a possible cause of the short. My speculation assumes that the double slip is an Insulfrog.
You indicate that a dead short occurs as the point rails are thrown.
If you study a Peco double slip turnout, there are two stock rails, four frog rails, and four closure rails. One stock rail, two frog rails, and two closure rails carry a positive polarity and the opposite stock rail, frog rails and closure rails carry a negative polarity. All ten of these rails are fixed (non-movable) and gapped with jumpers molded to the underside of the rails to provide connectivity.
In addition to these ten fixed rails, there are eight hinged (movable) point rails, and two throwbars, each of which controls the movement of 4 point rails.
Since you have said that the problem is definitely a short and that the gaps are not compromised, I would conclude that there is no problem with any of the ten fixed rails.
My guess is that the problem is with one of the hinged point rails.
Peco turnouts, including double slips, are all power routing. Power is transferred to the point rails by making physical contact with the adjoining fixed rails. For a dead short to occur, one of the point rails would have to pick up power of the opposite polarity from a nearby point rail.
Visually check all eight point rails to determine if they are all moving correctly or if one or more of the point rails are failing to move correctly as the throwbars are activated.
Rich
Believe I have solved the problem. One of the hinged pts in Q1 was apparently shorting thru the tie (?). A thin piece of plastic between the pt and the tie eliminated the short. Thanks to Rich and all for your suggestions.
Bruce, glad to hear that you found the problem and thanks for reporting back to us.
Rich
[quote user=“zstripe”]
You have to be more meticulous in Your search…visual won’t work in this case. Good Luck! Frank
Bruce22,
The above works 99% of the time.
Glad You resolved the problem.
Take Care! [:D]
Frank