No, there's typically no separate relay dedicated solely to turning on the brake lights in a 2000 Ram van V8. The brake light circuit is generally a simple, direct circuit controlled by the brake light switch. The switch itself acts as the primary switch, directly supplying power to the brake lights when the brake pedal is depressed. High current is handled by the wiring itself, and any protection (like fuses or circuit breakers) is located elsewhere in the system (usually in the fuse box under the hood or the dash).
While some more complex vehicle systems *might* use a relay for the brake lights for redundancy or to handle exceptionally high current draw, it's uncommon, especially in a 2000 model year vehicle. If there were a relay, it'd be highly unusual and not part of a standard design. Troubleshooting brake light issues on that vehicle should focus on the brake light switch, wiring, bulbs, and fuses/circuit breakers.
