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Old 07-23-2018, 10:46 AM   #3
RonD
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Turn signal Flashers(relays) use a bi-metal bar the heats up and bends, breaking electrical contact, then cools off and reconnects, on/off, on/off, on/off, ect...........

The LOAD(watts/amps) of the light bubs is what heats up the bi-metal bar.
When a bulb fails there is LESS load so no flash, doesn't heat up enough
When you add trailer lights, more bulbs, it can flash faster, a higher load so heats up faster

When you change to different bulbs you change the load, so you either need to change the flasher type or mimic the previous load, i.e. add resistors

Last edited by RonD; 07-23-2018 at 10:49 AM.
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