TIU Fixed 2 No Power

try the power supply that works on fixed 2 then your tiu should work. if it still does not work you need to check  continuity . if it does not work check the Tiu  in and output with a VOM volt ohm meter and  see if you read a short ! if you read a short on fixed 2 in or out you most likely have a shorted TVS diode! P:s when your using fixed 2 you have to use aux power supply  ac input or wire from transformer to variable 1  must be powered for tiu fixed 2 to work ! Alan

Actually, the first thing to check is the fuse for the FIXED #2 channel.  A shorted TVS would be tripping the breaker on the PH180.  You don't need any power to other channels for power to come through FIXED #2, however DCS won't work unless the TIU internal electronics are powered from AUX power or FIXED #1.  Variable channels won't work at all without powering the TIU internal electronics as well.

Can you post a picture of your wiring?  That often helps a ton.

Ok, great responses as usual.  I included my pictures so hopefully everyone knows that I have some clue to the process.  I have a brother-in-law that spent years in electronics so hopefully with your game plans and his knowledge I will solve this.  I’m just so upset that I might have damaged something the first day I tried it out.  I understand that I should power up the TIU with auxiliary but The MTH power supply I ordered last June still hasn’t shipped.  I think I will just get something else for now.  How do I reset the Lionel Powerhouse?  I pressed the red button but it doesn’t seem to work.  Thanks again for all your help!

wiring looks ok to me. Do you have a volt ohm meter?  Like Alan and GRJ mention do you have:

1 ) a short in loop 2?

2) blown fuse in the tiu?

3) voltage out of both powerhouses?

These are a start.

Update is blown fuse in TIU.  Powerhouse is the newer model with the pin that wasn’t pushed in using adapter plug.  I found another thread with another person having the same issue.  My brother-in-law helped check the Powerhouse and the relay wasn’t kicking on because of the pin.  I guess whoever made my adapter plug needs to add something to that third hole.  I appreciate all of the great knowledge and information on this site.  Thank you!

For the new PowerHouse 180, you need to either put a pin in that 3rd position or jam the switch on the PH180 that needs to be pressed to provide power.

@gunrunnerjohn posted:

For the new PowerHouse 180, you need to either put a pin in that 3rd position or jam the switch on the PH180 that needs to be pressed to provide power.

Yes, and I didn’t realize my two PH180 units were different.  Well I guess I did when I noticed three wires and not two but I still didn’t know about the issue until searching this site for problems.  My brother-in-law was happy that I had found some answers here.  It makes repairs much easier!  😃