Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.
Truck-Lite · Electrical & Lighting
TRU40203
In stock · ships from Knoxville
This is a sealed incandescent dome light for interior illumination in heavy-duty trucks, trailers, and RVs.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 1 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Universal fit
Universal interior dome light for any 12V truck, trailer, or RV with a 4-inch grommet mount cutout. No make/model-specific fitment verified.
Part data verified against 4 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
It features a round 4-inch clear polycarbonate lens and housing that are sonically sealed to keep out moisture and dust. The shock-mounted bulb extends service life, and the light mounts into a standard grommet for easy installation. It is commonly used as a cab dome lamp or cargo area light and can be replaced when the bulb eventually fails or when upgrading to an LED unit.
Part Number: TRU40203
DOME LIGHT SEALED BEAM
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside electrical & lighting
