The light on the red pop bumper is in the 25v section of your schematic, if you have one. It is powered by a make/break switch on the 0-9 unit which is the AS stepper in the backbox that also runs your match function. In order to be lit on the 25v side it uses a 75 ohm 10 watt resistor in order to knock the voltage down to where it won't blow the bulb right away.
It could be that the resistor has gone bad but I think more than likely your 0-9 AS stepper is not moving. Have you noticed whether or not your match lights change? If not this is more than likely your issue. You need to remove that relay from the game, it just unplugs via two jones plugs, and get it cleaned up and stepping correctly. They are fiddly but can be made to step properly. This game has two of them, on of them is the 0-9 unit we're talking about, and the other is under the playfield that is part of the spin when you land in the hole. That kicks off the spinner unit on the motor board and every time that unit make contact, it steps the spin unit under the playfield one position. If it isn't functioning properly your spin will not function properly either.
As for why your bumper is sluggish, you need to rebuild it. As a matter of course I rebuild every single bumper of every single game I take in to restore. The parts are too cheap not to do it. The bumper pulls in and is activated by the spoon switch on the bumper itself. That fires the F relay which is the red bumper relay. That in turn sends power to the bumper coil and it pulls in. You need to make sure that all the switches on the F relay are clean and adjusted properly, along with the contact on the spoon switch. If the 10 point bumpers are scoring then the problem is not with the 10 point relay. The red bumper scores 10 when not lit. There is a second switch that is open on the switch stack for the bumper where the spoon switch is. That switch is held open by the fiber yoke on the bumper mechanism. When the bumper coil pulls the plunger in that switch is allowed to close and that fires either the 10 or 100 point relay, depending on whether or not the bumper is lit.
That's the starting points for you to check. But I definitely think you should rebuild the bumper. Clean everything up good and replace all the parts and I'll bet it fires just fine. Before you do that, you can check the resistance of the bumper coil and see where it is. The proper coil is an A-4893 which should have a resistance of about 2 ohms. If you're not getting about that resistance that can be part of your issue too.