Proposal from the Task Force on Headlamp Switching to clarify requirements for electrical connections for headlamps, daytime running lamps, and related lighting devices.

Headlamp switching task force working draft with possible amendments to UN R48 pursuant to GRE-78-21/Rev.1.

Japan comments on manual switching off of headlamps during night conditions and the relationship between DRL and front position lamps.

Proposal to address inconsistencies, clarify text, and correct terminology in Regulation No. 48:

• para. 5.7.2.1. editorial alignment of text with current terminology
• replace undefined “effective outlet” terminology with defined “apparent surface” reference
• reintroduction of missing reference to “transverse plane” in paras. 5.10.1. and 5.10.2.
• para. 6.2.9. and related subsequent paragraphs to clarify the application of the 2000 lumen criteria
• para. 6.26.9.2. to correct a cross-reference with UN R23.

Proposal to re-insert paragraph 5.11.1.3. with regard to switching between headlamps and DRLs. Although GRE agreed to delete this and related paragraphs during its 77th session (see para. 19 and Annex II of the 77th session report), the Task Force on Headlamp Switching decided upon further review to retain the possibility to switch ON DRLs in conjunction with at least the rear position lamps without the need for the position lamps tell-tale in that case.

Proposal to enable approval of side-marker and position lamps with regard to switching requirements when mutually incorporated. Vehicles include designs where lamps wrap around vehicle corners. In cases where optional side-marker lamps are grouped with a position lamp that is reciprocally incorporated with the direction indicator, it should be possible to switch off the side-marker lamp (as can be done with the position lamp) in order to improve conspicuity of the direction indicator.

Proposal to amend GRE/2016/33 and GRE-76-17 pursuant to discussions at the October 2016 GRE-76 session:

1. The direct reference to Regulations Nos. 97 and 116 that was included in GRE-76-17, para. 2.37. was removed based on the observation of the representative of Finland on a potential split, in the future, of some of the Regulations under the responsibility of GRSG.
2. In another remark from the representative of Finland, the word “indicator” that was missing in the last sentence of para. 2.37. in the text of the proposals GRE/2016/33 and GRE-76-17 has been added.
3. Based on the comments from the representatives of France, UK, Finland and Japan, the area of the apparent surface, mentioned in GRE/2016/33 and GRE-76-17, para. 5.30. (c) has been lowered from 50 cm² to 20 cm², in the case of one indicator is being installed on the vehicle. If two indicators are installed, the area of the apparent surface should not exceed 10 cm² per indicator.