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Electrical short in brake lights


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Not too much to add to what you have tried. As I am sure you know, the fuse blowing is usually do to only two reasons, too much current in the circuit or the positive side of the circuit shorting to ground. Assuming nothing else has been connected to the circuit (that eliminates a current overload), I would try removing the stop light bulbs and then press the brake pedal and see if it still blows the fuse. Does not happen often, but the blub could short internally. If the fuse still blows, that leaves you with a short to ground as the remaining possibility. if you have a VOM meter, test the bulb socket (with the bulb still removed). There are 3 wires to the socket. Only one (black) should show connectivity to ground. If more than one wire shows connectivity to ground, you have a short in your wiring at the socket or somewhere in the van. One last remote possibility. The floor shifter interlock is also in the circuit. Try disconnecting it. Good luck, you have a tough problem.

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