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What would make the parking brake light on your instrument panel blink 4 short 1 long on a 1993 Chevy Silverado?

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Answered 2007-05-09 03:52:44

this is a gm brake code 5 for Kelsey-Hayes RWAL (rear wheel antilock) 2 wheel trucks may have a failure of the isolation dump valve assembly, the shunt to relieve pressure so brakes won't lock up.

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The OBD2 system will not BLINK codes for you. It requires a engine scanner to read the codes. HAVE ENGINE SCANED. Some parts stores will do that for free.


it might need a new bulb - they often blink when they are about to die.


could be a problem with the sesor in the emergency brake. a bad connection there could cause the light to blink with the vibration of the car running On some cars, the brake warning light will blink if the parking brake is set, and you drive... it could be a failed parking brake switch, assuming the brake is not applied. It is supposed to blink to get your attention. One car that does this is the Mitsubishi Starion, there are probably some others, too.


your blinker will turn on but not blink if a bulb has gone bad on that side or if your relay or fuse has gone bad




there is something wrong with the wires. take it to a dealer to let them check it out!


Look from the outside. Either the front or back bulb is burned out.



<blink>anand</blink>


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Code 12 just means that the ECM is going into diagnostic mode, this is NOT a trouble code! Code 12 should blink a couple of times pause then blink your trouble codes if you have any. If you have no trouble codes, it will resume to blink code 12 again.


That usually means one or more of the bulbs is not working. Check for bad bulbs or bad ground wire or socket.


You need a OBD 1 system or take it to a mechanic to check.


The signal flasher relay may be at fault, swap it with the emergency flasher relay to see.


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First, check all of the bulbs. If one of the blinker bulbs in burnt out it will cause it not to blink on the side where the bulb is located. You have a defective Flasher Relay. Located behind left side of instrument panel.


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That's probably because that's the older van and the more original blinkers


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