Turn signal
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New User
Joined: Feb 2015
Posts: 21
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Turn signal
Hey guys. When my lights are off both my turn signal works fine but when I pull my light switch out my left turn signal stops flashing and the green arrow in the dash stays on solid. Right turn signal works fine with the lights on. I've heard of other 70s Fords do this also. And ideas if what it is? Thought it might be a ground problem buts since my right turn signal light works fine I didn't know. Any ideas?
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Yep missing, loose, or corroded ground cables can do just that. Possibly short in bulb/socket. Headlights are hogging the current and drawing it wherever they can.
YouTube and other sites have some super good tutorials on voltage drop testing, probably Eric the "Car Guy" has one iirc. This is a perennial problem with vintage iron if not actively addressed. Restored trucks can have similar problems after a visit to the paint booth.
YouTube and other sites have some super good tutorials on voltage drop testing, probably Eric the "Car Guy" has one iirc. This is a perennial problem with vintage iron if not actively addressed. Restored trucks can have similar problems after a visit to the paint booth.
Laughing Gas
Joined: Aug 2012
Posts: 920
Likes: 20
From: Malheur Co. OR
Check the bulbs first. Sometimes when they burn out the filament will weld itself to the other one causing weird issues. Another thing this will cause is the front TS coming on when you hit the brakes.
Make sure they are the correct bulbs. If they are not the right wattage sometimes the flashers will not operate properly.
Then check the grounds.
Make sure they are the correct bulbs. If they are not the right wattage sometimes the flashers will not operate properly.
Then check the grounds.
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