Turn signals not flashing but turn on when I push on the break pedal. Any ideas?

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Evan 86 K3500

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Turn signals not flashing but turn on when I push on the break pedal. Any ideas?
 

WP29P4A

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Verify that you have grounds, verify they are tight, make sure they are good clean connections. A wire brush/wire wheel works well cleaning connection points. A little dielectric grease keeps them from oxidizing for longer periods of time.

If all grounds are good I would look at the signal flasher next.
 

shiftpro

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Welcome to the site Evan and we need pics of that big block one ton 4x4!
 

mtbadbob

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Try a new flasher relay
 

75gmck25

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Did it just happen, or was it there when you bought the truck?

It’s almost always a broken ground wire, and you have to think of recent work on the truck (where you knocked a wire loose) to narrow down the choices.

First checks
Instrument panel ground up under the dash
Ground for the front harness in each side at the radiator support
 

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