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Hmmm.Now you see you are using a relay which was my first instinct but I had no idea how I could use the LS150's AC output to use as the signal to a 12 V relay or pair of relays , the manufacturer(Seep) provides very little info but there is this from a company that retails Seep products , https://www.gaugemasterretail.com/magento/seep-gmc-em1.html , it states 18 -25 V AC or DC , I have read from articles online that in practice they work best with DC at 18-20 volts and I have used a 20 volt DC supply to power one manually with great success , people have written that on AC they can hum annoyingly and the lifting action on the coupler is not as smooth as DC , your drawing shows 15VAC but if you only use the common terminal and + terminal on the LS150 you get a very low voltage whereas if you use 2 diodes you get around 8 volts half wave DC .
I'm just getting a very low reading ie something around 143 , I have taken 3 pics of how I wired the BR with the short stubby black and red wires being the connection to the LS150 and the plain black and red wires being the DC output to an uncoupler, does it look right to you ?
If you want to give another try, you can try this option using a 6vdc automotive relay.Hi , i'm getting about 8.4 volts but it's not lifting the coupler so I think i'm going to investigate further the DCC relay option I linked to earlier and i'll use the 20 volt DC supply to power it which means the LS150 is going to be finding itself on Ebay , I thank you for all your help and patience but I really do think that i've now reached the end of this particular line .
OK; it's possible the bridge rec has failed, as the original connection put one diode directly across the AC supply..Hi , i'm getting about 8.4 volts but it's not lifting the coupler