Blinker trouble

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08-09-2021, 07:33 PM

dfitch1

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Blinker trouble

Hello again, new problem. With the head lights on, left turn signal light stays on, on the dash. Ground problem?
thanks for any help

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08-09-2021, 11:09 PM

440 sixpack

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Good chance it's your socket on the turn-park light. could be front or rear. the POS sockets they used account for over half the problems with these lights.

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meangreen92

08-10-2021, 06:16 AM

77&79F250

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Elec diagrams start here. https://www.ford-trucks.com/forums/1...l#post14696846
T/S trouble shooting here. https://www.ford-trucks.com/forums/1...l#post18338355

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08-12-2021, 06:42 PM

dfitch1

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Thanks again, after further checking, the turn signal works with lights on or off. Seems a little dim. I will check the ground and replace the socket.

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08-12-2021, 11:24 PM

meangreen92

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Quote:

Originally Posted by dfitch1

Thanks again, after further checking, the turn signal works with lights on or off. Seems a little dim. I will check the ground and replace the socket.

The two positives to the socket are wired backwards. The bulb has two filaments, a dim one and a bright one.

The dim filament should be on the parking light circuit, with the turn signal using the brighter filament.

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