Brake light on

ZOG1974

MEMBER
1998 JEEP CHEROKEE
4.0L
6 CYL
4WD
AUTOMATIC
154,000 MILES

My brake light is on. I hear air escaping when I depress brake pedal, loud whoosh sound. Just replaced master cylinder last year and rear metal brake line yesterday because it was leaking. Is it the brake booster?

Monday, July 16th, 2018 AT 12:58 PM

1 Reply

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon.

Yes, it does sound like the booster is the issue. Common issue for that noise.

Roy

REMOVAL
1. On RHD vehicles remove the coolant reserve/overflow tank. Refer to Cooling System.
2. Disconnect brake lines at master cylinder.
3. Disconnect wire at combination valve differential pressure switch.
4. Remove nut mounting combination valve bracket to booster studs and remove valve.
5. Remove nuts mounting master cylinder to booster studs and remove cylinder.
6. Disconnect vacuum hose from booster check valve.
7. Remove knee blocker under the steering column.

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8. Remove retaining clip that secures booster push rod to brake pedal.

Booster Mounting
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9. Remove nuts attaching booster to passenger compartment side of dash panel.
10. In engine compartment, slide booster studs out of dash panel, tilt booster upward, and remove booster from engine compartment.
11. Remove dash seal from booster.

Image (Click to make bigger)