NHTSA ID Number: 10178175
Manufacturer Communication Number: 20-BD-014H
TSB/Document Date: 2020-08-07
Summary
This bulletin provides information regarding condensation related to moisture accumulation in the headlamp, rear combination lamp, daytime running lamp (DRL), or fog lamp. The TSB illustrates the various causes of condensation inside the lamp assembly. Lamp assembly replacement is NOT necessary in most cases. This condition can be eliminated by turning on the lamps with the engine running for several minutes, or during normal driving operation.
GROUP
Body
Technical Service Bulletin
SUBJECT:
DATE
NUMBER
20-BD-014H
MODEL(S)
July, 2020
ALL
INFORMATION FOR LAMP CONDENSATION
This TSB supersedes 19-BD-003H-1 by adding service information for diagnosing and
removing condensation and including other lamp assemblies.
Description: This bulletin provides information regarding condensation related to moisture
accumulation in the headlamp, rear combination lamp, daytime running lamp (DRL), or fog lamp. The
TSB illustrates the various causes of condensation inside the lamp assembly.
Lamp assembly replacement is NOT necessary in most cases. This condition can be eliminated by
turning on the lamps with the engine running for several minutes, or during normal driving operation.
Applicable Vehicles: All
General Information: Various causes of lamp condensation.
1) Natural Condensation
2) Condensation from Engine Startup
Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair
SUBJECT:
in
INFORMATION FOR LAMP CONDENSATION
A. Lamp Condensation Identification
NOTICE
Condensation from moisture accumulation is a normal occurrence. Lamp assembly
replacement is NOT necessary to resolve this issue.
1) Normal Condensation
Condensation occurring inside the lamp
assembly during or after a car wash cycle is
considered a natural occurrence. This condition
occurs when water vapor inside the lamp
assembly is exposed to temperature variations.
This condensation is NORMAL and
replacement is NOT REQUIRED.
See page 4 of the service procedure for
removing normal condensation.
Normal condensation in the headlamp
2) Water Leak
If water is collecting at the bottom of the lamp
assembly, or the condensation remains after the
lamps have been on for 30 minutes or more,
there may be a water leak in the assembly. The
leak may be caused by a poor seal between the
lamp housing and lens, cracks in the lamp
assembly, or poor fitment.
The condition should be diagnosed and
repaired as necessary.
Water collecting inside the headlamp
TSB #: 20-BD-014H
Page 2 of 4
SUBJECT:
SUBJECT:
INFORMATION FOR LAMP CONDENSATION
B. Moisture / Condensation Repair Flowchart
TSB #: 20-BD-014H
Page 3 of 4
SUBJECT:
SUBJECT:
in
INFORMATION FOR LAMP CONDENSATION
C. Lamp Assembly Drying Guidelines
Ensure that the vehicle is parked in a well ventilated area and that the dust cap(s) have been
removed prior to drying the lamp assembly.
Certain lamp assemblies may have two dust caps. Remove both dust caps if applicable.
To avoid battery discharge, the engine must be running while the lamps are on.
Allow the vehicle to idle for 30 minutes with the engine running and lamps turned on for moisture /
condensation to evaporate.
Remember to reinstall the dust cap(s) after drying the lamp assembly.
Example of dust cap location
NOTICE
Normal warranty applies for any lamp assembly with moisture / condensation.
TSB #: 20-BD-014H
Page 4 of 4
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TSB/Document ID: 20-BD-014H
Replacement Service Bulletin Number:
MFR Communication Date: 2020-07-14
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT ADAPTIVE/MOBILITY
MFR Component System:
MFR Component Subsystem:
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