Did it work prior with regular bulbs?

Not sure on that game, but most that use a relay board usually have a 2nd one somewhere for another purpuse. One trick is to swap the relay board with another to confirm/isolate the problem.

Relay boards are nothing but a relay which is a low failure item, and a connector which is a high failure item. So like Lost said, check/reflow is a good start prior to purchasing a new one.

Are these flashers or GI? If flashers, then 12vdc, if GI then 6.3VAC. And if GI you would go one lead each side of the input, not 1 lead to ground.

And trust me you do not want to shove meter leads into a socket. It is like playing the game of Operation, except instead of a buzzer when you slip, you can mess up your lamp matrix drivers. Been there, got a couple t-shirts.

Also keep in mind that GI has 4 to 6 'strings' and each is protected by a separate fuse on the PPB. Make sure that it is not something as simple as a single blown fuse.

Grats! Now to figure out Pmaino...

Pmaino, the fuses will be in the manual on Page 40 of http://mirror2.ipdb.org/files/2765/Williams_1990_Whirlwind_Operations_Manual_Br_With_Schematics.pdf

To figure out which one is which,,, Page 96, Backbox Interconnect Board. Probably F5.

WilliamsSys11Fuse_(resized).PNG

Ok you got me confused with these short posts.

Are you saying Pmaino's problem is not fuses? And you figured it out? Can you share?

Or are you saying the problem YOU had was not fuses

Need some context here.

Ahh gottcha..

So it was an interconnector issue. Good catch.