Front turn signal bulb burning out

[bmdfiat76]

Hi all. We have been tinkering with our 1976 fiat spider in our spare time mostly cleaning up bad connections. One thing that puzzles us is with the left front turn signal not working. We replaced the 1154 bulb that was in it with an 1157. The bulb came on and the signal worked but the filament continued to glow between blinks never really going out completely between blinks and then burning the new bulb out in less than a minute.

[azruss]

two things to check. make sure you didnt put the bulb in the wrong way. the locator pins are off set, so it is hard to screw it up....not impossible Usually when the bulb remains dim, then it is not grounded and it is using the other filament as a ground. If the bulb didnt burn ultra bright then you probably had a bad bulb from the get-go.

[bmdfiat76]

Okay. New discovery. The turn signals won't work when the headlights are on.

[bmdfiat76]

BTW - thanks for the reply. Forgot my manners.

[azruss]

BAD GROUND! headlights have a good ground and pulling all the juice.

[spider2081]

Strange but I googled 1154 bulb and it came up a 6 volt double filament. 1157 googled and it comes up 12 volt dual filament.
If the car has a mix match of bulbs the flashers can not work correctly.
For sure clean the ground pods on the front fenders, and the one in the trunk near the left tail light.