# Service bulletin 14203

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10248738
- Published by NHTSA: 2024\-01\-16
- Manufacturer's number: 14203
- Manufacturer's date: 2014\-12\-01
- NHTSA component: EXTERIOR LIGHTING:HEADLIGHTS

## NHTSA's summary

Low\-Beam Headlamps Inoperative

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2014/MC-10248738-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2014/MC-10248738-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Lighting, Headlights

## Vehicles listed

- 2008 to 2013 CHEVROLET CORVETTE

## Other bulletins for the same vehicles and component

- [02\-08\-42\-001I](/bulletins/10116890.md), 2017-08-31, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS; EXTERIOR LIGHTING:BRAKE LIGHTS; EXTERIOR LIGHTING:BACK UP LIGHTS. This informational bulletin provides an out line on Headlamp, Tail Lamp, License Lamp or Fog/Driving Lamp Damage and what should be considered warranty replacement and not
- [01\-08\-42\-001K](/bulletins/10116874.md), 2017-08-31, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS. This informational bulletin provides information on exterior lamp condinsation and replacement guidelines
- [14203](/bulletins/10090181.md), 2017-02-02, Service bulletin: ENGINE; ELECTRICAL SYSTEM; EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH. 14203 \- CUSTOMER SATISFACTION PROGRAM. ON CERTAIN VEHICLES, WHEN THE ENGINE IS WARM, THE UNDERHOOD BUSSED ELECTRICAL CENTER \(UBEC\) HOUSING WILL EXPAND, CAUSING THE HEADLAMP LOW\-BEAM RELAY CONTROL CIRCUIT ROUTED WIRE TO BEND SLIGHTLY. AFTER THE WIRE IS REPEATEDLY BENT, IT CAN FRACTURE AND SEPARATE. WHEN THIS OCCURS, THE LOW\-BEAM HEADLAMPS WILL NOT ILLUMINATE. AS THE UBEC HOUSING COOLS AND CONTRACTS, THE LOW\-BEAM HEADLAMP FUNCTION MAY RETURN. THIS CONDITION DOES NOT AFFECT THE HIGH\-BEAM HEADLAMPS, MARKER LAMPS, TURN SIGNALS, DAYTIME RUNNING LAMPS OR FOG LAMPS. LOSS OF LOW BEAM HEADLAMPS WHEN THEY ARE REQUIRED COULD REDUCE THE DRIVER’S VISIBILITY, INCREASING THE RISK OF A CRASH. DEALERS ARE TO INSTALL A JUMPER WIRE.
- [14203](/bulletins/10067325.md), 2016-05-23, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
- [PB\-14203](/bulletins/10056600.md), 2015-01-13, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS. CHEVROLET: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. UNDERHOOD BUSSED ELECTRICAL CENTER \(UBEC\) HOUSING HAS EXPAND AFTER ENGINE WARMED UP CAUSING LOW\-BEAM HEADLAMP RELAY CONTROL CIRCUIT ROUTED WIRE TO BEND SLIGHTLY AND CAN FRACTURE AND SEPARATE AFTER REPEATEDLY BENDING AND NO ILLUMINATION OF LOW BEAM HEADLAMP. MODEL 2008\-2013 CORVETTE. \*PE
- [4624](/bulletins/10023421.md), 2007-12-10, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS. FINE CRACKS OR CRAZING ON HEAD LAMP LENS. \*NJ

JSON: [/v1/bulletins/10248738](/v1/bulletins/10248738)

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