99 4runner Brake Light

Romer · 10-14-07, 07:57 PM

The Brake light in dash on Rachels 4runner is lit intermittantly.

The Master Res cap was loose, I put it on good. Fluid level is good and I verified the brake itself was disngaged and nothing ubstructing the lever.

What else feeds into this warning light?

terryjmatthew · 10-23-07, 12:17 PM

The brake fluid level sensor might be bad?
Havent really looked at mine to see what kind of sensor it has.
I'll check and get back wth you.

Bighead · 10-23-07, 02:05 PM

According to my 2001 4Runner FSM, either brake fluid level is low (which you already fixed) or hydraulic brake booster power supply is bad. Is she getting any buzzer sounds when when the light comes on?

Romer · 10-26-07, 12:43 PM

Quote:

Originally Posted by Bighead

According to my 2001 4Runner FSM, either brake fluid level is low (which you already fixed) or hydraulic brake booster power supply is bad. Is she getting any buzzer sounds when when the light comes on?

No buzzer sounds.

So it doesn't have anything to do with the ebrake? like potentially a bad sensor there or needing adjustment?

Bighead · 10-26-07, 03:22 PM

Quote:

Originally Posted by Romer

No buzzer sounds.

So it doesn't have anything to do with the ebrake? like potentially a bad sensor there or needing adjustment?

Check your PMs.

I didn't see anything about in my FSM. Here are the symptom/suspect areas from the FSM that reference a brake warning light coming on.

--Brake warning light lights up (Parking brake lever released) (note 1)
1. Brake fluid level
2. Hydraulic brake booster power supply system (Faulty)

--Brake warning light lights up and brake warning buzzer sounds (note 2)
1. Hydraulic brake booster power supply system (Faulty)

--ABS warning light lights up (note 3)
1. Anti - lock brake system (Faulty)
2. Hydraulic brake booster power supply system (Faulty)

Notes 1, 3: The light may stay on for about 60 seconds after the engine is started. It is normal if it goes out after a while.

Notes 2, 3: Depressing the brake pedal repeatedly may turn on the warning light and buzzer. It is normal if the light goes off and the buzzer stops sounding after a few seconds.

Note 3: While ABS warning light is ON.

underthehood · 10-26-07, 10:34 PM

you can try looping the wires at both the master cylinder and the p-brake lever switch. this will bypass both sensors to see if that is your problem. be sure to do one at a time. good luck

10-14-07, 07:57 PM	#1
Romer Kneel for the Shaman Join Date: Sep 2003 Location: Englewood, Colorado TLCA# 13968 Posts: 7,550	99 4runner Brake Light The Brake light in dash on Rachels 4runner is lit intermittantly. The Master Res cap was loose, I put it on good. Fluid level is good and I verified the brake itself was disngaged and nothing ubstructing the lever. What else feeds into this warning light? __________________ Ken Romer ~ Friend of Shaman Keeper of the FAQ, Defender of Newbies, and Slayer of Tards Commander Rising Sun 4WD Club - K0ROM 97 LX450, Supercharged, Locked, and lots of other stuff ROTW 96 LX450 - ROD's 06 4Runner - Wife's 99 4Runner - daughterofromer's 03 BMW Z4 Roadster

10-23-07, 12:17 PM	#2
terryjmatthew IH8MUD Junior Join Date: Feb 2007 Location: Auburn, Al TLCA# 17870 Posts: 89	The brake fluid level sensor might be bad? Havent really looked at mine to see what kind of sensor it has. I'll check and get back wth you. __________________ -Matthew 2000 S/C 4Runner Ltd 98 Taco on 60's

10-23-07, 02:05 PM	#3
Bighead Fear the Bunny Join Date: Nov 2003 Location: CO TLCA# 15114 Posts: 156	According to my 2001 4Runner FSM, either brake fluid level is low (which you already fixed) or hydraulic brake booster power supply is bad. Is she getting any buzzer sounds when when the light comes on? __________________ Lance 2001 4Runner Limited 4X4 -- 315/75R16 MT/Rs \| MT Classic IIs \| Dual ARBs/4.88s \| (F) 5125/Tundra Coils (R) 5125/LC Coils \| 4Crawler 1.5" BL \| Aisin Manual Hubs \| Slee Sliders \| Sonoran Steel Rear Bumper \| TJM T-15 w/ Warn M8000 2004 Land Cruiser -- Stock for now

10-26-07, 10:34 PM	#6
underthehood IH8MUD Junior Join Date: Jan 2007 Location: santa barbara,ca TLCA# 17696 Posts: 79	you can try looping the wires at both the master cylinder and the p-brake lever switch. this will bypass both sensors to see if that is your problem. be sure to do one at a time. good luck __________________ '07 FJ Cruiser TRD Bud Built skids.(ALL) All Pro rear bumper and trailing arms, Demello sliders and High Lift jack mounts, Demello front bumper with t-max 9k winch(synthetic), TRD cold air intake, 305/70r16 BFG MT'S, 2.5 inch leveling kit(no tire rub), Inchworm e-locker cover

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