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Unread 09-24-2007, 09:46 AM   #1
pharriso
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How to reset "Brake Warning" Light?

I flushed the brakes on my 2002 Grand Cherokee yesterday, now the brake warning light is staying on, any ideas on how to reset it?

I guess at some point the fluid dropped down low enough to trigger the light (engine was running while I did the bleed).

I turned the ignition on/off 3 times, but that did not fix it.

TIA

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Unread 09-24-2007, 09:49 AM   #2
ArloGuthroJeep
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If the brake light is still on, there is still a fault in the system. How do the brakes feel?
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Unread 09-24-2007, 09:50 AM   #3
ArloGuthroJeep
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Also, have you driven it? When I bleed my brakes I'll have my brake light and abs lights on and they won't turn off until I drove all of 10 ft.
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Unread 09-24-2007, 11:38 AM   #4
pharriso
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The brakes feel fine.

I took it out for a test drive of about 1 mile, the brakes feel great!
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Unread 09-24-2007, 11:47 AM   #5
sandman
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it should turn off when you cycle through the ignition.
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Unread 09-24-2007, 12:10 PM   #6
pharriso
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Quote:
Originally Posted by sandman
it should turn off when you cycle through the ignition.
What do you mean by that? The light stays on...
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Unread 09-24-2007, 12:21 PM   #7
Bricolage
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Have you tried disconnecting the negative battery cable? I don't know if or how it would help, but it might be worth a shot.
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Unread 09-24-2007, 12:40 PM   #8
pharriso
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Quote:
Originally Posted by Bricolage
Have you tried disconnecting the negative battery cable? I don't know if or how it would help, but it might be worth a shot.
Yes I have disconnected & reconnected the battery.
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Unread 09-24-2007, 12:45 PM   #9
MuddyLuxury
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is the brake warning light? or the parking brake idiot light? might try pulling the fuses for the abs and what not drive it around the block, disconnect the battery and then put the fuse back in and reconnect the battery.

just a thought nobody kill me.. lol
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Quote:
Originally Posted by 5.9 ANDY
i would do the rear.
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Unread 09-24-2007, 01:02 PM   #10
pharriso
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It's the parking brake idiot light, but according to the drivers manual it also shows regular (hydraulic) brake system errors.
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Unread 09-24-2007, 01:05 PM   #11
MuddyLuxury
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pull open the center console to see if something is causeing a short.. its a dumb switch setup really easy for someting to get stuck in there and cause issues
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99 WJ 4.7V8 selc-trac swap
285s re-tread
IRO 6.5 Long Arms
Aussie Locked Rear

in the works... lots deployments are great for jeep budgets

Go Doorless!


Things i need..
good spots in the mid atlantic to camp, hike, fish, kyak and wheel, if you know please share

Quote:
Originally Posted by 5.9 ANDY
i would do the rear.
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Unread 09-24-2007, 02:53 PM   #12
indept
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It's the hydraulic differential pressure switch. The brakes are separated into 2 hydraulic "circuits" usually front & rear but sometimes front right and left rear & left front and right rear. This gets set by pressure on one side or circuit being higher than the other side. To reset, you have to have someone pumping the brake then hold it while you blead 1 side or the other JUST til the light goes out. Basically your trying to "center" the switch again. when you trip it by bleeding the brakes the way you did, it trips the switch & it latches in that position. You have to lower the pressure in the opposite side to reset it. It's a PIYA but it will reset.
Good Luck When you bleed brakes by somebody pressing the pedal, instead of a brake bleader hooked to the system, NEVER have them push the brake all the way to the floor, only press it down about half way & stop til you close the bleeder screw, then pump it up & repeat til all the air is out. That way you won't trip the pressure switch.
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Unread 09-29-2007, 06:03 PM   #13
wingless
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Quote:
Originally Posted by indept
To reset, you have to have someone pumping the brake then hold it while you blead 1 side or the other JUST til the light goes out.
That is so correct. When I was centering mine I tried to give it a little extra, to ensure it was centered and it went right back on. I then had to push it the other way by opening the other circuit.
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Unread 08-08-2010, 06:23 PM   #14
earthquake5683
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Do you "bleed" it at a caliper?
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Unread 08-08-2010, 09:17 PM   #15
indept
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Quote:
Originally Posted by earthquake5683 View Post
Do you "bleed" it at a caliper?
Yes. Operate the bleeder wrench with one hand only, That leaves the other hand to hold your beer...
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