parking lights
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
Do both sides do it, or just one? What about the side marker lights? Are they okay?
The marker lights and parking lights are all on the same circuit. If it's a switch problem then all of them should be acting up.
If just the parking lights flicker, I would first, check the bulb sockets, be sure the contacts are clean and free of corrosion and the contacts aren't weak and are making good contact with the bulb. Next check the ground connection. They are grounded to the radiator support. Be sure the connection is clean and tight. Check the wiring for any damage and it probably wouldn't hurt to put new bulbs in.
The marker lights and parking lights are all on the same circuit. If it's a switch problem then all of them should be acting up.
If just the parking lights flicker, I would first, check the bulb sockets, be sure the contacts are clean and free of corrosion and the contacts aren't weak and are making good contact with the bulb. Next check the ground connection. They are grounded to the radiator support. Be sure the connection is clean and tight. Check the wiring for any damage and it probably wouldn't hurt to put new bulbs in.
More Turbo
Joined: Jan 2009
Posts: 547
Likes: 11
I have lights that work most of the time but sometimes not. Yesterday I took them apart and found the bulbs to be very loose in the socket. Apparently that's my only problem.
Good luck solving yours
.Dennis
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
All these lights are on the same circuit (BROWN wire) and are sourced from a separate pole of the headlight switch (vs. power to the headlights). If the headlights do NOT exhibit a failure, I would suspect the headlight switch in this case. An internal failure within the headlight switch could affect the parking lights without affecting the headlights. If the headlights acted up too, the diagnosis would be different.
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
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Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 783
From: Simi Valley, CA
First, do all the things Mike suggested. If you can move the bulbs around in the socket and make them work or go off maybe you need new sockets.
I just ordered a pair yesterday from here: Front Park Light Socket-Broncograveyard.com
Despite what Bronco Graveyard claims, these will NOT fit 1973 or 1974 F100/350's before serial number T80,001.
I just ordered a pair yesterday from here: Front Park Light Socket-Broncograveyard.com
Despite what Bronco Graveyard claims, these will NOT fit 1973 or 1974 F100/350's before serial number T80,001.
D1FZ-13234-A .. Plastic T/S Socket / Reproduced
1971/73 & 1977 Pinto / 1974 F100/350 from serial number T80,001 / 1975/78 LTD / 1975/79 F100/350 / 1975/91 Econoline / 1978/79 Bronco.
And as a taillamp socket for 1974 F100/350 Stylesides from serial number T80,001 / 1975/79 F100/350 Stylesides / 1975/91 Econoline / 1978/79 Bronco.
1973, 1974 F100/350 before serial number T80,001: The park and tail lamp bodies are metal, the individual plastic lenses screw to the bodies that have the sockets swagged into them.
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