On my Hot Shot, only 1 special lamp lights at a time. It alternates between the left & right standup targets, controlled by a make/break switch on the A relay. It sounds like you might have an inadvertent make/make switch on the A relay instead?

If a special lamp is lighting, then the AX relay has definitely pulled in.
Do the standup targets score points?

In order to score a special replay, the circuit shown between rows 6 and 7 on the schematic should come into play. There is a long series circuit.

Thus, a motor switch (green-black wire) at position 1C needs to be conducting, along with closure of the (lit for special) standup target switch, along with one of the make/break switches (yellow wire) on the A relay (there are 5 m/b switches on the A relay), along with a NO switch (yellow & red wire) on the AX relay, along with the 15th position switch on the credit unit itself. The game will not score a special if you already have 15 games on the credit unit.

Let us know if all those switches check out.

Lee

But do the standup targets score points? I suggest starting to inspect and clean the switches mentioned above.
OR, use Howard's jumper cable method to isolate which one (or more) of the switches are not conducting.

Lee

Does the machine award score replays or matches?

Can you see the EX relay pulling in?

The EX should have two NO switches. One of those switches, when closed, will deliver power to the credit unit (Gottlieb may call it the Add Replay Unit) solenoid. If the EX relay energizes, but you still get no replay, try jumpering the switches closed with an alligator clip and test again.

Lastly, it is less likely, but possible, that a Jones plug has a wire broken off or a plug not seated.

Raff, If the EX relay is never pulling in, then either:

1) one of the switches in the circuit that I mentioned in post #6 and that Howard redlined in post #15 is still not conducting so that EX coil never gets power, or

2) the EX relay coil itself is not functional.

One way to test for #2 is to jump power to the terminals of the EX coil using either a 9V battery (enough voltage to make it move weakly) or just to jump power from the terminals of the coin door lockout coil which is always hot while the game is powered on. If EX still never pulls in, you may have a bad winding (broken wire or open circuit) in the relay coil.

WRT #1 above, the bane of the EM game is the switch that "looks" to be making solid conduct, but still does not conduct current for some reason. Howard can probably explain better than I can, but the basic idea is to sequentially short circuit each possible switch in the redlined circuit of post #15 using the jumper cables, until you isolate which switch (or switches) in the circuit are not functioning to conduct current through to the EX relay coil.

Lee

Good job in staying persistent.

Hitting the special target is hard enough, without getting "cheated" out of a replay. LOL.

The credit unit probably was designed to allow the operator to limit the # replays to 7 or 15. I've also seen machines before where that credit unit switch was so dirty that it did not conduct electricity anyway.

You have a point. Most games will not award a credit or fire the knocker if that switch is open or non-conducting. You did say that the machine awarded replays from score. Likely was one of the other switches that you cleaned & adjusted.