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Why would a 1989 GM truck brake warning light stay on blinking?
Wiki User
∙ 14y ago
Check the antilock wire beneath the master cylinder.
Also the RWAL (rear wheel anti-lock) computer will store a (1 code at a time) code due to a faulty system. This code can be read by counting the flashes starting with the long flash as one and following with the short flashes there after (1(long)2(short)3(short)...and so on). The long flash always starts the new set of flashes. If the brake light stays on then a code reader will need to be used ($20 on ebay), which is read the same way.
Wiki User
∙ 14y ago
Wiki User
∙ 9y agoThere are many reasons why the brake light will blink on a car. One such reason is if it is time for the brake system to be serviced. Another reason for the blinking brake light could be low brake fluid.
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What is the color of the wire for the tail lights on 1994 Chevy 4x4 Silverado if the tail lights do not work but the brake backup lights do and the fuse is good?
Look under the rear of the truck on the left side frame rail. The wire for the back up lights is light green. The brake/turn signal wire on the left side is yellow. The brake/turn signal wire on the right side is dark green. Your taillights and bumper lights are a brown colored wire. You also have a black ground wire. I ; those are the wire colors for the rear lamps on my truck anyways. I own a similar Chevy truck. Good luck. I ran into one that may shed some light. The brake light switch harness get damaged from the poor position it is in. It is a real mother to get at too. Post your results. I had the same thing on my '91.It was a headlight switch
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