Identify Optronics STL69 and STL68 Trailer LED Lights
When replacing a trailer combination lamp, confirm whether the original has only stop/turn/tail functions, an integrated reflex reflector or a white back-up section. These Optronics lights have different sizes and wiring, even though each is a sealed LED unit. Their manufacturer numbers identify the actual configuration.
Three different trailer-light functions
STL69RK: standard 15-inch light
An 11-LED stop/turn/tail bar with 14-1/8-inch mounting centres and a chrome A69CB base in the retail package. It does not include the separate back-up function.
STL69RRXB: 15-inch light with reflex
An 11-LED stop/turn/tail bar with built-in reflex reflector. Optronics lists its S2/T2/I6/A functionality for over-80-inch applications. It shares the STL69 footprint, not every mounting or trim detail.
STL68RBP: shorter FUSION backup combo
The 14-LED red/clear light adds a back-up circuit. Its body is about 10.125 inches wide and mounts on 9-11/16-inch centres, so it is not a drop-in replacement for a 15-inch STL69.
Optronics exact-model comparison
| Optronics MPN | Functions | Overall dimensions (W x H x D) | Mount centres | Wiring |
|---|---|---|---|---|
| STL69RK | Stop, turn and tail | 15 x 1.375 x 0.625 in | 14.125 in centres | Red stop/turn; black tail; white ground |
| STL69RRXB | Stop, turn, tail and reflex | 15 x 1.375 x 0.625 in | 14.125 in centres | Red stop/turn; black tail; white ground |
| STL68RBP | Stop, turn, tail and backup | 10.125 x 3.063 x 0.500 in | 9.6875 in centres | Red stop/turn; black tail; brown backup; white ground |
The STL69RK and STL69RRXB have 15-inch bodies but different reflex functions. STL68RBP is shorter and adds a separate backup-light circuit. These models are not automatically interchangeable.
Identification and inspection checks
- Identify whether the old light has a built-in reflex reflector or a separate white back-up section.
- Measure the full light and mounting centres; the STL68 is a different shape and mounting pattern from STL69.
- Check the entire harness for damaged insulation and the correct power and ground circuits.
- Compare the original retail kit and mounting trim with the item actually offered; a loose light may not include a chrome bezel.
- Test the functions on the vehicle before use. Check the item listing for condition and contents; viewing and pickup are by appointment in Kelowna.
Identify the matching Optronics assembly
Check the individual product listing for exact contents, condition and availability.
Identification and RV tail lights
For the grouped red rear-identification function, compare Optronics LED identification bar models. For side-specific rectangular RV tail lights, see the RV tail-light and lens guide.
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