Trailer antilock brakes (ABS)
Section 6.3 of the CDL handbook covers trailer antilock brakes and their warning lamp. It is tested on the Combination Vehicles test.
Key facts
| Part of | the Combination Vehicles test (80% to pass) | DL-7C p. iv |
|---|---|---|
| Handbook section | §6.3 Trailer antilock brakes | DL-7C p. 6-7 |
| Questions in CDL Mile's bank | 4 | CDL Mile, checked against DL-7C |
Key rules
- § 6.3.2p. 6-7
ABS is an extra on top of the normal brakes, so if it fails your regular brakes still work. Keep driving normally, but have the ABS serviced soon.
Braking with ABS
Try two questions
Combination Vehicles · Trailer antilock brakes
In normal driving, how does the handbook tell you to brake a tractor-trailer that has ABS?
Tap an answer to see the explanation and the handbook page.
Combination Vehicles · Trailer antilock brakes
How does ABS change your braking, according to the handbook?
Tap an answer to see the explanation and the handbook page.
More Combination Vehicles topics
Sources
Texas Commercial Motor Vehicle Drivers Handbook (DL-7C), revised March 2026, Texas Department of Public Safety. Page references are to its printed page numbers. CDL Mile is independent and not affiliated with Texas DPS.
Updated for the March 2026 Texas CDL handbook (DL-7C). Last checked November 4, 2026.
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