Optronics LED Identification Bars: Base, Grounding & Size
Optronics red identification light bars are built for the grouped rear marker application on vehicles over 80 inches wide. MCL70RS, MCL93RBP and MCL97RK differ in LED count, base material, overall size and how the ground connection is made. Match the existing mounting area and wiring before replacing an assembly.
Three identification bar designs
MCL70RS: slim 3-LED design
A 15-inch-wide red identification bar only 5/8 inch deep, with a black power lead and white ground lead. Its three diodes and thin body distinguish it from the other two assemblies.
MCL93RBP: nine LEDs on black base
The approximately 15.94-inch polycarbonate assembly has nine red LEDs, a brown power lead and separate white ground wire.
MCL97RK: nine LEDs on stainless base
This 14.25-inch bar has a stainless mounting base, brown power lead and self-grounding connection through the mounted base. Confirm a sound conductive ground path.
Optronics exact-model comparison
| Optronics MPN | LEDs | Overall dimensions (W x H x D) | Base | Power / ground |
|---|---|---|---|---|
| MCL70RS | 3 red LEDs | 15 x 1.375 x 0.625 in | Polycarbonate | Black power; white ground |
| MCL93RBP | 9 red LEDs | 15.938 x 1.469 x 1.625 in | Polycarbonate base | Brown power; white ground |
| MCL97RK | 9 red LEDs | 14.25 x 1.188 x 1.313 in | Stainless steel base | Brown power |
Identification light bars are not stop/turn/tail lamps. Their grounding designs differ: do not assume a one-wire, self-grounding bar replaces a two-wire model without verifying the installation.
Before selecting and installing
- Confirm that the trailer calls for a red identification light bar in the intended position; manufacturer-listed over-80-inch applications do not replace the vehicle's lighting requirements.
- Measure the existing bar and mounting-hole pattern, including clearance around the base.
- Choose between separate-wire ground (MCL70/MCL93) and a conductive mounting-ground design (MCL97).
- Match the wiring functions using the specific Optronics instructions; brown and black power leads differ between families.
- Repair corroded electrical connections and seal mounting penetrations according to the trailer manufacturer's instructions.
Optronics lights by exact manufacturer number
Open the specific model for further specifications and current online availability.
Other trailer lighting references
For lights that perform stop, turn or backup functions, see our Optronics trailer combination-light comparison. For small individual clearance lamps, use the marker and clearance light reference.
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