I'm trying to test a relay coil. Found a post here about testing coils. It said to hook the coil up to something that's working.

OK, found a pop bumper that's working. Turned off the machine. Jumpered from the black on the pop coil to the black on the relay coil I'm testing. Jumped the color wire lead to the color wire lead.

Activated the pop and blew a fuse.

My original plan before I read about the above, was to jump from the "Start" lug on the transformer (has black wires) to the black wire lug on the coil and from the "regular" lug on the transformer to the other lead on the coil.

Would that have been correct? If not, how do I power up a coil to see if it works?

Thanks!

Mike

PS Thanks to my Pinside Secret Santa who got me those nifty circuit breakers! They are coming in real handy this weekend.

So, why did the fuse blow? I’m trying to learn what I did wrong.

Tried just jumpering the orange-something wire to a pop.

Triggered the pop.

Lots of smoke from the reset bank.

Blew the 115 v line fuse. Somehow, jumping to a pop does not seem like a good idea. Wasn’t touching anything by mistake. Jumped with alligator clip wire

The coil tests at 15 on the multimeter, disconnected.

Gottlieb AG relay coil. I think this machine has the same voltage throughout, once you get past the house current. 1961 Gottlieb Flipper Fair.

P'raps I should have looked at the schematic first…

Thanks. I’m careful- the jumper was clipped in place and all I touched was the pop bumper skirt. I’ll check the schematic.

Per the schematic, the pops and everything else run at 25v, except the lamps which are 6v. So, getting a burned wire on the reset bank just from jumpering from a pop bumper coil to a relay coil indicates something else is really wrong, right?

Got the game working to the point where I could rack up points to see what was and wasn't working. Racked up enough points to score an extra ball. Fuse blew. The problem's got to be either the AAB relay or its coil.

Doesn't seem like the former owner could have wired the coil backwards. A relay coil doesn't matter which way it is wired, does it?

Already have some. But I thought the problem had been solved and put a fuse back in. Go figure...