An RV marker lamp can be missing its cover, have a broken housing, or stop lighting altogether. To identify the correct replacement, compare the original shape, fastener spacing, wires and lens type before shopping by colour. This reference groups Optronics models by how they mount, not just how similar they look.
Start with the lamp body and its mount
Simplified category icons show basic shapes only, not true part drawings, drilling templates or interchange information.
Optronics series matching chart
Use these family characteristics to narrow the choices. The same outer footprint does not prove the electrical connection or lens is the same.
| Series | Listed size | Mount | Electrical / component type |
|---|---|---|---|
| AL90 mini-thinline LED | 2-1/2 × 1-1/4 × 1 in | Mini rectangular mount | Light-only or self-grounding base-and-pigtail kit |
| MCL10 3/4-inch round LED | 0.73-in light; 3/4-in nominal opening | A11GB rubber grommet | Hard-wired black power and white ground |
| MC44 incandescent reflex | 4 × 1-1/2 × 0.938 in | Rectangular surface mount; 3-in hole centres | Two-wire lead and ground; replaceable #194 bulb |
| MCL40 two-LED reflex | 4 × 1-1/2 × 0.938 in | Rectangular surface mount; 3-in hole centres | Two-wire; separate power and ground |
| MCL44 six-LED self-grounding | 4 × 1-1/2 × 0.938 in | Rectangular surface mount; 3-in hole centres | One power wire; ground through mounting |
| MC/MCL44 replacement lens | For compatible 4-in reflex series | Snap-on acrylic lens component | No wiring; replacement cover only |
Identify the existing lamp step by step
- Look for the molded model number on the rear of the old lamp or the mount.
- Photograph the front and the mounting holes, then record dimensions before the original is discarded.
- Identify whether you have one or two electrical leads and whether the ground depends on the mounting surface.
- Check for a removable snap-on reflex lens, a replaceable incandescent bulb, or an integral sealed LED module.
- Compare the relevant model and component photographs below; select the same lamp family unless a complete conversion has been properly checked.
Compare the exact Optronics parts in our catalog
These listings are grouped to make model identification easier. Open the specific product to check its availability and description.
Identify AL90 mini-thinline LED
Check for the slim 2-1/2-inch lens and the black A91BB-style base. A bare AL90 light differs from an AL90AK/RK retail kit; the latter adds the base and single-wire self-grounding pigtail. The shape alone does not identify the connector.
Identify MCL10 3/4-inch round LED
The MCL10 series is a small round push-in grommet system, not a screw-on rectangular lamp. These examples include the A11GB grommet. Verify the .75-inch nominal cutout and the two-wire connection before assuming a replacement fits.
Identify MC44 incandescent reflex
Find a four-inch rectangular housing with a snap-on reflex cover and replaceable incandescent bulb. MC44ABP is amber, MC44RBP is red. Compare mounting holes and the existing two-wire setup; do not substitute an LED self-grounding version without checking the installation.
Identify MCL40 two-LED reflex
If the existing four-inch rectangular reflex lamp has two LEDs, inspect its wiring: MCL40ABP and MCL40RBP are two-wire versions. They should not be confused with one-wire self-grounding MCL44 lights even when the lens outline looks similar.
Identify MCL44 six-LED self-grounding
Count the LEDs and inspect the ground path. MCL44AB1 (amber) and MCL44RB1 (red) are six-LED single-wire versions whose ground connection depends on the mount. A two-wire lamp is not the same electrical configuration.
Identify MC/MCL44 replacement lens
A44RBP is a red replacement lens only. It can help when the compatible MC/MCL44 lamp works but its lens is damaged; it does not include a lamp body, bulb, LED module or wiring.
Manufacturer series specifications: AL90 mini-thinline · MCL10 round LEDs · MC44 incandescent · MCL40/44 LED reflex. Check the exact model number before selecting wiring or mounting components.
Check each UsedRVParts listing for its condition and availability. Viewing and pickup in Kelowna are by appointment.