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08-13-2002, 01:38 PM
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#1 |
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Registered User
Join Date: Aug 2002
Location: Oregon
Posts: 6
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brake idiot light
It appears that I have a common problem. I've found some discussion in the archives but no confirmed solution.
I have a 88 Chevy 2500 with non-abs brakes. The brakes work fine. The brake idiot light is always on. It's britter when the parking brake is engaged. Has anyone fixed this problem? |
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08-13-2002, 03:41 PM
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#2 |
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Senior Member
 
Join Date: Jun 2000
Location: Texan in Iowa
Posts: 2,549
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Are you sure you don't have rear ABS? I know all half tons had rear ABS standard, but I cannot recall whether 3/4s had it or not. If you have ABS, you'll have a black box hanging around between the master cylinder and the inner fender.
It could be any number of reasons why the light is on. If you have a Chilton's or Haynes manual, it should describe how to induce the light to give you an error code so you can narrow down your search for the source of the problem. If you don't have a manual, then let me know, I have both of them. Good luck! 
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Ben '68 Chevy C10 Custom LWB 327/TH400 2nd owner '94 Ford Explorer XLT 4wd '25 RAM 1500 Laramie 4wd |
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08-14-2002, 03:27 PM
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#3 |
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Registered User
Join Date: Sep 2000
Location: Dayton, Ohio
Posts: 214
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My '89 S-15 has a proportioning valve that prevents full braking power to the rear before the front brakes are fullly loaded. Maybe your set up is similar, look under the master cylinder at the fire wall for the valve.
My dash light came on and it was "fixed" by disconecting the battery. The goodwrench guy said that clears the computer. They did it before reading the codes and the light did not come back on. I never had a problem braking. Could it be a parking brake cable problem? I bent mine, according to the shop, and it caused all sorts of trouble because the back brakes did not disengage fully. They would get hot and grab. |
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08-14-2002, 05:26 PM
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#4 |
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Registered User
Join Date: May 2000
Location: Rohnert Park, CA
Posts: 615
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I have a 90 3/4 Sub 4X4 with rear abs and having some issues with the abs and cruise control, The lot i bought the sub from gave me a print out for code 9 speed sensor! I wonder if that has to do with my speedo being wrong and the cruise not to work. What fuse on the fuse block is for abs/cruise? Because the block is not labeled for such! Oh by the way have a friend with a 89 3/4 ton sub 4X4 w/no rear abs.
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72 GMC Burb barn door 4X4 350/350 PS PB Tilt ( gone but not forgooten) 64 Chevy II V8 Loaded Wagon 2004 Chevy 2500 HD Sonoma County, Northern CA |
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08-14-2002, 11:19 PM
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#5 |
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Senior Member
Join Date: Jun 2000
Location: Texan in Iowa
Posts: 2,549
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nova, yeah that would disable the cruise. It requires a signal from the vehicle speed sensor (VSS). Shouldn't be too hard to replace, in the transfer case.
Thanks for the info, I need to figure out what options/equipment goes with each year of these trucks... 
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Ben '68 Chevy C10 Custom LWB 327/TH400 2nd owner '94 Ford Explorer XLT 4wd '25 RAM 1500 Laramie 4wd |
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08-16-2002, 10:24 PM
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#6 |
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Registered User
Join Date: May 2002
Location: Jeffersonville, IN
Posts: 67
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my dads 88 has the same problem. We have been fightingit for years. Good luck and let me know if you fix it.
Jeremy |
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09-10-2002, 01:02 PM
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#7 |
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67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,856
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There is a reset switch at the top of the brake arm. You have to hold the brake all the way down with one hand and lift up on the switch with the other. Very simple to fix unless there is a major issue.
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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