How do you install a leviton lighted switch no.1461

SOURCE: How does the illuminated light work inside a

The neon lamp inside of the switch draws very little current (milli, or mico amps) so there is no significant current flowing to ground.

As for your real question, there are several various types of 3-way pilot switches:
Load on: Pilot on
Load off: Pilot on
Some 3-way pilot switches have an external lead which allows them to be configured either way.
If both of your switches are the same type and are wired correctly, they should work the same.
If you suspect that one is defective, try swapping them.

Testimonial: "Thank you very much. It turns out one of the two was simply dective. Thanks!"

SOURCE: I have just installed 2 Leviton decora switch with

This is a single pole light switch and should be wired as any other SP switch. The only difference is that is has a pilot light. All the white neutral wires are tied together and then pushed back in the box with none connected to the switch. The grounds are tied together with a jumper wire connected to the green screw on the switch. That will leave you with 2 or more black wires. If you have just two normally you can connect them to the two screws on the switch and it does not matter which screws. However it may be that with the pilot light you need to connect the wire going to the light to the top screw and the power wire to the bottom or vice versa. Try both ways. If you have more than 2 black wires you need to connect the incoming power black wire and outgoing power black wires together and then jump to one of the screws on the switch. The black wire left over is the black wire going to the light itself. If none of this works then it is obvious the pilot light in the switch is burnt out.

Testimonial: "Thanks a million. I will recheck the wiring tomorrow. Chas"