Smudge617
Well-Known Member
Morning All
I'm new to the HO scale and American Locos in particular, (I normally model UK steam in OO gauge). But have decided to go in a new direction.
My query is this, I have an SD7 loco that is fitted with an 8 pin socket and 12v bulbs front and back, I've fitted a Digitrax decoder and all is well, runs beautifully, lights work, great, but I want to swap out the 12v bulbs for LED's, I've done this many times on UK locos, no problem, but I cannot get them to work on the SD7 and I cannot work out why, I know it's not the polarity, and I've tried with and without resistors, I've refitted the original lights, and they still work. There is a wire marked "cut for DCC" but there seems to be some indecision on several forums as to whether this wire needs to be cut or not. Do I need to cut this wire? or as seems to be the case, swap out the circuit board? If it's a new circuit board which would you suggest replacing it with?
Many thanks for your help.
I'm new to the HO scale and American Locos in particular, (I normally model UK steam in OO gauge). But have decided to go in a new direction.
My query is this, I have an SD7 loco that is fitted with an 8 pin socket and 12v bulbs front and back, I've fitted a Digitrax decoder and all is well, runs beautifully, lights work, great, but I want to swap out the 12v bulbs for LED's, I've done this many times on UK locos, no problem, but I cannot get them to work on the SD7 and I cannot work out why, I know it's not the polarity, and I've tried with and without resistors, I've refitted the original lights, and they still work. There is a wire marked "cut for DCC" but there seems to be some indecision on several forums as to whether this wire needs to be cut or not. Do I need to cut this wire? or as seems to be the case, swap out the circuit board? If it's a new circuit board which would you suggest replacing it with?
Many thanks for your help.