---
kind: "section"
citation: "49 C.F.R. § 393.22"
title: "49"
number: "393.22"
heading: "Combination of lighting devices and reflectors."
url: "https://uscodex.org/cfr/49/393.22"
---

# §393.22. Combination of lighting devices and reflectors.

- (a) **Permitted combinations.** Except as provided in [paragraph (b)](#b) of this section, two or more lighting devices and reflectors (whether or not required by the rules in this part) may be combined optically if—
  - (1) Each required lighting device and reflector conforms to the applicable rules in this part; and
  - (2) Neither the mounting nor the use of a nonrequired lighting device or reflector impairs the effectiveness of a required lighting device or reflector or causes that device or reflector to be inconsistent with the applicable rules in this part.
- (b) **Prohibited combinations.**
  - (1) A turn signal lamp must not be combined optically with either a head lamp or other lighting device or combination of lighting devices that produces a greater intensity of light than the turn signal lamp.
  - (2) A turn signal lamp must not be combined optically with a stop lamp unless the stop lamp function is always deactivated when the turn signal function is activated.
  - (3) A clearance lamp must not be combined optically with a tail lamp or identification lamp.

## Notes

### Amendments

[39 FR 26908, July 24, 1974]

### Authority

Authority: 49 U.S.C. 31136, 31151, 31502; sec. 1041(b), Pub. L. 102-240, 105 Stat. 1914, 1993; secs. 5301 and 5524, Pub. L. 114-94, 129 Stat. 1312, 1543, 1560; and 49 CFR 1.87.

### Source

Source: 33 FR 19735, Dec. 25, 1968, unless otherwise noted.

### Amendments

[39 FR 26908, July 24, 1974]