Question about 2003 Chevrolet Suburban 1500

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Brake lights don't work fuse blows right away?

As soon as i place a fuse in the brake lights is blows right away i've replaced the brake lamp switch and check the wiring at the switch and at the rear tail lamps and all looks fine

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  • bensisko06 Mar 03, 2009

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Check Trailering Wiring

Posted on Mar 03, 2009

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Fuse pops on taillights and brake lights


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You should check carefully to see which fuse is blowing and what circuits it controls.
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The ground wiring on newer vehicles is a little complicated. Older cars, the ground would have been to the body around the tail-lights, but these have a ground wire in the harness and is connected to the turn-signal switch, and other sources. I don't think you have a ground problem. Does the fuse blow as soon as you press it into the fuse-block, or when you step on the brake? I believe you have a dead short somewhere, possibly a pinched turn-signal wire close to the tail-light assembly. Brake lights work through the turn-signal wires from the turn-signal switch on the steering column. That's how you can have one side blinking for turn while the other side stays on for brake. I'm kind of shooting in the dark here because I don't know what all you've done. If you replaced the turn-signal switch in the steering column, you may have pinched a wire or something there. Another thing, if the fuse doesn't blow as soon as you press it in, will both turn-signals work as long as you don't press on the brake? If you can provide a little more information, I might be able to help you more. One last thing....Have you replaced tail-light/turn-signal bulbs? If so, be sure you used the right bulb. You should only have two bulbs, one for back-up lights and one 1157-type combination for tail-lights and turn-signals. I have seen people use a single contact (1056) bulb in place of a 1157, which creates a short from brake/turn-signal back into the tail-light circuit. I do have a 1994 Dodge Dakota.

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Kia Sadona 2004 brake lights not working. I have replaced the Brake light switch and removed the brake lights every time peddle is pushed down the fuse blows. Brake lights and brake light switch has been...


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