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Brake light flashing codes?


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#1 Batman7593

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Posted 30 October 2003 - 03:46 PM

I recently acquired my next fixer-upper, a 1993 3/4 ton 4x4. The previous owner stated that the brake light comes on intermittently and that he's had it checked out and nothing is wrong. However, today it came on for the first time and it was flashing.

Here is the sequence (the same every time):

1) Brake light comes on steady (~1 second)
2) It flashes 8 times (quicker timed flashes)
3) Repeats steps 1 and 2

I thought it might be a bad sensor or loose cable until it started flashing in sequence.

Anybody have any ideas? I'm stumped.

Any information will be greatly appreciated. Thanks in advance!!

PS - The brake is not on......

Edited by Batman7593, 30 October 2003 - 03:47 PM.


#2 t4lude98

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Posted 15 February 2009 - 10:32 PM

I recently acquired my next fixer-upper, a 1993 3/4 ton 4x4. The previous owner stated that the brake light comes on intermittently and that he's had it checked out and nothing is wrong. However, today it came on for the first time and it was flashing.

Here is the sequence (the same every time):

1) Brake light comes on steady (~1 second)
2) It flashes 8 times (quicker timed flashes)
3) Repeats steps 1 and 2

I thought it might be a bad sensor or loose cable until it started flashing in sequence.

Anybody have any ideas? I'm stumped.

Any information will be greatly appreciated. Thanks in advance!!

PS - The brake is not on......


same problem here

#3 Nytemare

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Posted 16 February 2009 - 11:15 AM

I am assuming that your talking about the lights in the dash...trouble lights.

This usually indicates there is a problem with your braking system. The reason it is flashing than staying on and repeating is because it is doing a scan of the system, when it finds a problem it sets a code and the light blinks rapidly. I don't know if the sequence or number of flashes mean anything, but the whole deal means you have a problem. If you take it to someone with a good scan tool, or the dreaded dealership, they can read the code set by the ABS computer.

In the end...contact cleaner on your systems electrical plugs and coat the contacts with di-electric grease may be all thats needed. Find your ABS computer also and do the same to its connections....it may have 16years of corrosion and condensation built up.

If there is a problem with the ABS, The computer will disable the system and you will have good old fashioned power breaks...that you have to pump yourself if you get into a dicey situation.
Posted Image

so you expected something that weights 5000 pounds and has aerodynamics of a piano to get what?


2003 Silverado XCSB, 4.8L, Flowmaster super44 SI/DO, G80 3.42, MSD Wires, K&N drop-in filter, Yellow Top Battery, Royal Purple in entire Drivetrain, W4M tune....My DD..............................SOLD
2010 Silverado XCSB 5.3L Z71 Summit White, Diablo Trinity tuned....more to come soon.
2010 Cobalt 2.2L LT 2Dr. Victory Red....gas saver/wife's Car.......SOLD
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#4 t4lude98

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Posted 16 February 2009 - 06:32 PM

I am assuming that your talking about the lights in the dash...trouble lights.

This usually indicates there is a problem with your braking system. The reason it is flashing than staying on and repeating is because it is doing a scan of the system, when it finds a problem it sets a code and the light blinks rapidly. I don't know if the sequence or number of flashes mean anything, but the whole deal means you have a problem. If you take it to someone with a good scan tool, or the dreaded dealership, they can read the code set by the ABS computer.

In the end...contact cleaner on your systems electrical plugs and coat the contacts with di-electric grease may be all thats needed. Find your ABS computer also and do the same to its connections....it may have 16years of corrosion and condensation built up.

If there is a problem with the ABS, The computer will disable the system and you will have good old fashioned power breaks...that you have to pump yourself if you get into a dicey situation.


there has to be a plug somewhere that you can use a jumper wire on and read the flash code and then look up the code from a list
ell usually

#5 Texas Jim

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Posted 17 February 2009 - 08:00 AM

I recently acquired my next fixer-upper, a 1993 3/4 ton 4x4. The previous owner stated that the brake light comes on intermittently and that he's had it checked out and nothing is wrong. However, today it came on for the first time and it was flashing.

Here is the sequence (the same every time):

1) Brake light comes on steady (~1 second)
2) It flashes 8 times (quicker timed flashes)
3) Repeats steps 1 and 2

I thought it might be a bad sensor or loose cable until it started flashing in sequence.
Anybody have any ideas? I'm stumped.
Any information will be greatly appreciated. Thanks in advance!!
PS - The brake is not on......



I think 9 flashes mean an open circuit in the ABS part of your brakes.
Check around the rear hubs for a broken wire.
Also check the ABS box by the master cylinder for a loose/broken/unplugged wire.
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#6 t4lude98

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Posted 17 February 2009 - 05:05 PM

thank you for your help




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