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RABS code 16 ????

Old Oct 10, 2024 | 10:16 PM
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RABS code 16 ????

94 f350 7.3 idi

So my abs light came on the other day
i had vacuum pump and master cylinder replaced a couple months ago and brakes have been very good

when I started the truck the brakes felt a little soft, noticed the abs light, drove around the neighborhood and put it up

ran the diagnostic test with the jumper wire and it blinked 16 times (including the long one at the end)

googling the codes 16 or more flashes should not occur issue

any ideas ???

I hooked it back up and started the truck, the light was off and even after a couple pushed on the pedal it didn’t come back on
 
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Old Oct 10, 2024 | 10:27 PM
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16 - would be a single blink, pause then six blinks.

16 blinks in a row doesn’t make sense afaik.
 
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Old Oct 10, 2024 | 10:34 PM
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Hmm, another thought, idi is completely mechanical? Computer only runs transmission control correct?
 
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Old Oct 11, 2024 | 06:34 AM
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Originally Posted by wwhite
16 - would be a single blink, pause then six blinks.

16 blinks in a row doesn’t make sense afaik.
RABS flashout codes via the ABS lamp are not the same procedure are the PCM flashout codes.

The code consists of a number of short flashes and ends with a long flash. Count the short flashes and include the following long flash in the count to obtain the code number. For example, three short flashes followed by one long flash indicates Flashout Code Four. The code will continue to repeat itself until the key is turned off. It is recommended that the code be verified by reading it several times.

More information:
RABS Codes

RABS Flow Chart

RABS Troubleshooting

All courtesy of Steve83
 
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Old Oct 11, 2024 | 06:35 AM
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Originally Posted by wwhite
Computer only runs transmission control correct?
Correct.

Has nothing to do with the Rear Anti-lock Brake Systems (RABS).
 
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Old Oct 11, 2024 | 06:37 AM
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RABS Code 16 info from Subford:

Yellow Rear ABS Warning Light Flashes 16 Times When Retrieving Diagnostic Trouble Codes (Code 16)
Possible Source(s):
No codes stored in anti-lock electronic control module.
Action(s) to Take:
STOP. Rear anti-lock brake system functioning properly.

Clipped from this thread: https://www.ford-trucks.com/forums/1...l#post19255809
 
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Old Oct 11, 2024 | 08:58 AM
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thanks for the replies,

I was confused because 16 on the codes chart says "should not occur" and i read that as it's not possible,

after reading the instructions again I may have tested it wrong,

I had it grounded when I turned the key, when I ungrounded the ABS light started flashing, 15 short and one long

the instructions say to turn the key, then ground / unground to get the code,

hopefully this afternoon I'll get back at it,
 
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Old Oct 11, 2024 | 01:01 PM
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Ford RABS-I systems, 1992 and older, Code 16 description states it should never happen. Ford RABS-II, which has the capability to store codes the Ford Service Manual states this for Code 16:
 
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Old Oct 11, 2024 | 01:08 PM
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thanks, that's very helpful, I appreciate it
 
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