resetting the combination valve brake warning light -
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Unread 07-01-2011, 11:32 AM   #1
Rusty Barrels
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1979 CJ7 
Join Date: Dec 2006
Location: KENT
Posts: 17
resetting the combination valve brake warning light

After I installed a new master brake cylinder on my 1979 jeep I bled the brakes without locking the valve and now the warning lamp is on all the time. What do I have to do to reset the valve and turn the warning lamp off? The brake system is non powered.

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Unread 07-02-2011, 09:16 AM   #2
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1984 CJ7 
Join Date: Jan 2010
Location: Kansas City, MO
Posts: 2,423
When I replaced the rear pads, and bled the brakes, I ran into the same issue. I didn't do anything with the prop valve when I bled them even though it seems like its about 50/50 on this forum as far as the pin on the valve. My light was on also after bleeding, and it just took another round of bleeding to have it go out. There was still air in the line after the first bleeding. Try to rebleed them.
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Unread 07-02-2011, 11:17 AM   #3
Mike Romain
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1986 CJ7 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant, Nova Scotia, Canada
Posts: 17,248
That normally means you still have air in the lines. The switch is self resetting on the ones I have seen.
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
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Unread 07-02-2011, 12:32 PM   #4
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1983 CJ7 
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Location: Jacksonville, Florida
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Try bleeding in this order. RF LF RR LR RF LF. I read somewhere that doing the fronts first is supposed to set the prop valve. Worked for me.
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