ABS lite & brake lite
#1
11-04-2003 | 02:40 AM
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ABS lite & brake lite
I have a 1991 F150 Supercab with RABS I (rear anti-lock only).
I have two (I hope) unrelated problems.
1. My brake lite will not go off. I disconnected the plug at the master cylinder and it went off, but it still works when I engage the parking brake. By the way, I know the switch is closed, because I jumped the wires in the plug and the light came back on. I installed a new master cylinder, bled the brakes and I have a full firm pedal. It is full of fluid.
Does this mean the float mechanisim is faulty?? Or, is the proportioning valve faulty??
2. I have lost 1/2 of my RABS diagnostic connector. My ABS lite was on, so I checked the fuse - o.k.. I took the rear sensor out and it was closed - read 1400 ohms. I proceeded to look under the dash to run the "blinking light" test. Lo and behold, the diagnostic connector was disconnected. I found the black/orange wire and ran the test and got 4 blinks ( which according to my manual signals a broken circuit). I decided to reconnect the connector and see if I could get the light to go out.
BUT, I CANNOT FIND THE OTHER SIDE OF MY CONNECTOR. Could I have lost it?? Anyone know where the red wire side comes from or where it goes. Surely it did not just disappear.
Any info would be appreciated.
Thanks,
Chuck
I have two (I hope) unrelated problems.
1. My brake lite will not go off. I disconnected the plug at the master cylinder and it went off, but it still works when I engage the parking brake. By the way, I know the switch is closed, because I jumped the wires in the plug and the light came back on. I installed a new master cylinder, bled the brakes and I have a full firm pedal. It is full of fluid.
Does this mean the float mechanisim is faulty?? Or, is the proportioning valve faulty??
2. I have lost 1/2 of my RABS diagnostic connector. My ABS lite was on, so I checked the fuse - o.k.. I took the rear sensor out and it was closed - read 1400 ohms. I proceeded to look under the dash to run the "blinking light" test. Lo and behold, the diagnostic connector was disconnected. I found the black/orange wire and ran the test and got 4 blinks ( which according to my manual signals a broken circuit). I decided to reconnect the connector and see if I could get the light to go out.
BUT, I CANNOT FIND THE OTHER SIDE OF MY CONNECTOR. Could I have lost it?? Anyone know where the red wire side comes from or where it goes. Surely it did not just disappear.
Any info would be appreciated.
Thanks,
Chuck
#2
11-06-2003 | 12:23 PM
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Joined: May 2003
Posts: 3
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From: Houston
Have you resolved your problem? I ask because my brake light and ABS light come on as well. This just started. I have a '94 with rear ABS. Looking for a solution. Thanks.
Bill
bmcgullam2@juno.com
Bill
bmcgullam2@juno.com
#4
11-24-2003 | 09:01 AM
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Joined: Nov 2003
Posts: 16
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From: Highland, Maryland
I first bought a 97 f-150 a few months ago. I took it to get inspected and it needed brakes all the way around. I knew the guy i bought it from pretty well so he helped me put on new brakes. After we did this my ABS and brake light kept coming on. To make a long story short one of the back brakes wasnt on evenly, and once we went back and made sure it was on there real flush both lights went off. I dont know if that helps any, but good luck.
#5
12-10-2003 | 06:40 PM
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Joined: Nov 2003
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Rear sensor
I just happened to see your post and read the part about the rear sensor. You stated that you had a reading of 1400 ohms...that isn't a closed switch reading. A closed switch(non-solid state) is a dead short which will be zero ohms. Because some meters aren't that accurate, you may get one or two ohms, somewhere around there. Hope you got your problem fixed.
bbstacker
bbstacker