Rear Antilock

[Bronco Jo]

Does anybody know why my Rear Antilock light would have just all of the sudden started blinking? Sometimes it stays lighted up and other times it blinks. I know that my ignition switch is crap and needs to be replaced, so could that be the problem?

 

[50joe]

Does anybody know why my Rear Antilock light would have just all of the sudden started blinking? Sometimes it stays lighted up and other times it blinks. I know that my ignition switch is crap and needs to be replaced, so could that be the problem?

Count the flashes and see if it throws consistant numbers. If it flashes twice, pauses, then flashes five times, thats code 25. (or what ever numbers it spits out.) Once you get the numbers you can look them up. Most likely the speed sensor in the rear, But try to catch the codes to be sure.

 

[Bronco Jo]

Thanks for the info.

 

[paintballdude902]

was the rear antilock an option in 89? mine has it also but i wish it didnt my old truck had anti lock front and drum rear so i had incredible stopping power any idea if i can easily convert my bronco to this config?

 

[miesk5]

RABS Self Test Diagnostic Connector Location pic in a 90; "...It comes out of a large loom under the dash, coming through the firewall, near the parking brake. On mine there are 2 similar connectors in that area, the correct one has only 1 black/orange wire running to it & was hidden on top of the loom..."

Source: by ElKabong

RABS Self Test & Diagnosis; except 93-96 - Click NEXT to view all pages)

Source: by Jem270

RABS Diagnostic Trouble Codes (DTCs)

Source: by Steve83

RABS Self Test; "...The 90 service manual gives a routine to pull RABS codes. When the light comes on, don't turn the truck off before reading the codes. Put it in park, chock both front & rear of the wheels, note whether the red brake light is lit also, then momentarily ground the test connector. The test connector comes out of a large loom under the dash, coming through the firewall, near the parking brake. On mine there are 2 similar connectors in that area, the correct one has only 1 black wire with an orange tracer running to it, & was hidden on top of the loom. The correct one is hanging down on the bottom right of the pic below. After you've grounded & ungrounded the wire, the yellow abs light starts to flash. Count the flashes. It said to not count the 1st series, because it may start in the middle. The last flash of the series is a long flash. Then it repeats over & over, until you turn the key off. Count all of the short flashes & the long one together (So 4 short & 1 long is code #5). If I remember right, it should be a number between 2 & 15 or so. If you follow Steve83's sig link, & then go to his Brakes & Hubs album, he has the code definitions for RABS.."

Source: by ElKabong

RABS Troubleshooting Flow Chart

Source: by Steve83

More RABS Troubleshooting, Wiring Diagrams, etc Links in my broncolinks.com site