Trailer antilock brakes (ABS)
Section 6.3 of the Ohio CDL Manual, HSY 7605, (p. 6-6) 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) | 49 CFR 383.135 |
|---|---|---|
| Manual section | §6.3 Trailer antilock brakes | HSY 7605 p. 6-6 |
| Questions in CDL Mile's bank | 4 | CDL Mile, checked against HSY 7605 |
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 manual tell you to brake a tractor-trailer that has ABS?
Tap an answer to see the explanation and the manual page.
Combination Vehicles · Trailer antilock brakes
How does ABS change your braking, according to the manual?
Tap an answer to see the explanation and the manual page.
More Combination Vehicles topics
Sources
Ohio Commercial Driver License Manual (HSY 7605), revised July 2026, Ohio Bureau of Motor Vehicles. Page references are to its printed page numbers. CDL Mile is independent and not affiliated with the Ohio BMV.
Updated for the July 2026 Ohio CDL manual (HSY 7605). Last checked November 5, 2026.
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