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Join Date: Jul 2005
Location: Alaska.
Posts: 9,633
General info:

Old type flasher relays are thermally actuated: one of the internal contact elements heats up from the resistance to current in the circuit, disconnects, cools, reconnects - over and over.

When you reduce the bulbs resistance by switching to LED, you allow the current to "flow faster" in the circuit which heats up the thermal contact faster in the flasher relay. This is why switching to LED bulbs in older cars results in a fast flash rate.

Switch your flasher relay to an electronic type and the problem is solved.
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Old 07-21-2008, 06:24 AM
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