Turn signal issues
Thread Starter
Racer
Joined: Jan 2005
Posts: 492
Likes: 0
From: Birmingham AL
Turn signal issues
My electrical debug saga on my '77 continues. Thanks again to everyone that helped me through the wire harness issues over the weekend. I think I have that sorted out now.
Today's issue is with the turn signal operation. I replaced both the direction flasher and the hazard flasher in order to get any operation out of the blinkers at all. Now I can get the hazards to flash when the button on the column is pushed. I can also get the turn signals to flash with the headlights OFF. However, when I turn the headlights on, the left turn signal indicator on the speedometer lights up, not as strongly as when the turn signal is on, but it lights up. The exterior lights are fine and seem to be as bright as you'd expect. When I try the turn signal with the exterior lights on, the left signal flashes but slowly and the right signal will flash exactly once and only once. As another note, I have replaced all of the exterior light bulbs with new ones and all illuminate just fine.
What could cause that odd signal behavior?
Today's issue is with the turn signal operation. I replaced both the direction flasher and the hazard flasher in order to get any operation out of the blinkers at all. Now I can get the hazards to flash when the button on the column is pushed. I can also get the turn signals to flash with the headlights OFF. However, when I turn the headlights on, the left turn signal indicator on the speedometer lights up, not as strongly as when the turn signal is on, but it lights up. The exterior lights are fine and seem to be as bright as you'd expect. When I try the turn signal with the exterior lights on, the left signal flashes but slowly and the right signal will flash exactly once and only once. As another note, I have replaced all of the exterior light bulbs with new ones and all illuminate just fine.
What could cause that odd signal behavior?
Race Director
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
Originally Posted by steves_77vette
My electrical debug saga on my '77 continues. Thanks again to everyone that helped me through the wire harness issues over the weekend. I think I have that sorted out now.
<<<SNIP>>
What could cause that odd signal behavior?
<<<SNIP>>
What could cause that odd signal behavior?
Pro
Joined: Apr 2005
Posts: 603
Likes: 2
From: Illinois, USA
It could also be caused by a lamp inserted backwards ...sounds funny, but I've seen the two-way bulbs inserted backwards cause this "feature". Worth a check, anyway (parking turns on blinker, so not too far fetched).
Brian.
Brian.
Thread Starter
Racer
Joined: Jan 2005
Posts: 492
Likes: 0
From: Birmingham AL
Originally Posted by SanDiegoPaul
Bad ground(s) in the dash harness.
Thread Starter
Racer
Joined: Jan 2005
Posts: 492
Likes: 0
From: Birmingham AL
Originally Posted by C3nMe
It could also be caused by a lamp inserted backwards ...sounds funny, but I've seen the two-way bulbs inserted backwards cause this "feature". Worth a check, anyway (parking turns on blinker, so not too far fetched).
Brian.
Brian.
Pro
Joined: Apr 2005
Posts: 603
Likes: 2
From: Illinois, USA
Originally Posted by steves_77vette
Which lamp do you think? I didn't realize that they could be put in backwards. I though they went in either direction with the plug-in and twist type that I have.
Hope that helps.
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