# NHTSA Preliminary Evaluation PE04020
> **FAILING HEADLIGHTS** · Opened 2004-02-26 · Closed 2004-06-24
## Investigation
- **Action number:** PE04020
- **Type:** Preliminary Evaluation
- **Open date:** 2004-02-26
- **Close date:** 2004-06-24
- **Manufacturer:** Ford Motor Company
- **Affected makes:** MERCURY; NISSAN
- **Affected components:** EXTERIOR LIGHTING:HEADLIGHTS
- **Affected model years:** 1999, 2000
- **Affected (make, year) variants:** 4
## Summary

NISSAN AND FORD FOUND THAT THE ORIGINAL EQUIPMENT HEADLIGHT STAINLESS STEEL BULB TERMINALS MAY OVER TIME CAUSE ELEVATED CONTACT RESISTANCE AND OVERHEAT THE ELECTRICAL CONNECTOR HOUSING.THIS CAN RESULT IN A HEADLIGHT FLICKERING, BULB OUTAGE AND HEAT DEFORMATION TO THE HEADLIGHT CONNECTOR.IN APRIL 1999, THE SUPPLIER OF THE HEADLIGHT FOR NISSAN AND FORD CHANGED TO A BULB USING THE STAINLESS STEEL TERMINALS THAT DID NOT MEET ORIGINAL SPECIFICATIONS.ON JULY 17, 2000, THE SUPPLIER BEGAN USING A BULB MEETING THE VEHICLE MANUFACTURER'S SPECIFICATIONS.THIS PROBLEM CAN AFFECT INDEPENDENTLY EITHER HEADLIGHT BUT DOES NOT CAUSE SIMULTANEOUS FAILURE OF BOTH HEADLIGHTS. THE PROBLEM ALSO DOES NOT AFFECT FRONT PARKING LAMPS.AS A RESULT, THE COMPLAINTS TYPICAL REPORT SINGLE FAILURE OF ONE HEADLIGHT.THERE ARE NO CRASHES OR LOSS OF VEHICLE CONTROL REPORTED.A SAFETY-RELATED DEFECT TREND HAS NOT BEEN IDENTIFIED AT THIS TIME AND FURTHER USE OF AGENCY RESOURCES DOES NOT APPEAR TO BE WARRANTED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT NO SAFETY-RELATED DEFECT EXISTS.THE AGENCY RESERVES THE RIGHT TO TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=PE04020)
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