front turn signal short?
front turn signal short?
front turn signal - Good evening everyone. I have a 1967 cutlass. One of the front turn signal lights is dimmer and has a slower flash than the other. I have put new bulbs and flasher fuses in, no change, I was told to check the light socket. I was wondering can the socket be replaced? It looks like its made on to the headlight housing. Does anyone have any other advise in finding the issue? Thank you for any help
Make sure you have the dual-element, dual-contact, 1157 bulbs front and rear. The front bulbs will obviously be yellow. It is difficult for most people to get a different bulb type in the socket, but there are some over motivated folks out there that can get 1156 style bulbs in the 1157 sockets. It can cause problems when they do.
Ok I inspected the wiring and bulb. The wiring looked ok. I replaced the bulb. The old one was the correct 1157. Have'nt checked the voltage yet. But I did notice the bulb socket on the drivers side, the one with the slow flash, was held in place with some black calking or silicone and moves around easily.. While the driver side, the good, side the socket is more stable. Does not move at all. Could this be the cause of my problems? Is the socket grounded to the housing unit? Do I need a new headlight housing unit?
Last edited by Paul Montoya; Jun 20, 2025 at 06:08 PM.
Do you know if the headlight housing grounds the turn signal socket? My socket is not secure to the housing. It has silicone around it yo hold t in place while the other side does not and is locked in place
Many, many years ago, cars had "parking lights". They had a detent position half way between "headlights on" and "headlights off". These were used for car trouble and "parking" for various reasons. The parking light position turned on the lights, tail lights and "I think instrument dash lights and radio dial light. Police frequently pulled over cars driving at night with only the parking lights on. This was usually a sign of someone "under the influence".
Then came a period of "running lights, later to add flashing "Hazard lights". Someone like Joe P can tell us when all of this became federally mandated.
Slowly pull the headlight switch out to see if you can feel an intermediate detent.
Then came a period of "running lights, later to add flashing "Hazard lights". Someone like Joe P can tell us when all of this became federally mandated.
Slowly pull the headlight switch out to see if you can feel an intermediate detent.
It's normal for the parking lights to go off with the headlights. It wasn't a fed mandate yet. American Autowire has instructions in their kits to make it go either way. You can jump them to the headlights through a relay, if so desired. If you don't use a relay, the headlights will probably overload the parking light circuir/fuse.
As far as your front marker socket goes, I'm pretty sure the socket is crimped onto the housing, thus being a difficult repair. If so, the ground being pulled through the sketchy connection could cause the slow flash. Best to replace the marker light housing.
As far as your front marker socket goes, I'm pretty sure the socket is crimped onto the housing, thus being a difficult repair. If so, the ground being pulled through the sketchy connection could cause the slow flash. Best to replace the marker light housing.
I learned the same thing about my '67. If you want the front parking lights to stay on, the options are to replace the light switch with one for a '68 or '69, or tie the front and rear parking light circuits together with a Scotchlock connector (or similar electrical connector).
The front parking light socket does ground through the chassis, so if yours is held in place with an RTV silicone product you probably have a weak ground. The best option is to clean all the silicone off and figure out a way to mechanically attach the socket.
The front parking light socket does ground through the chassis, so if yours is held in place with an RTV silicone product you probably have a weak ground. The best option is to clean all the silicone off and figure out a way to mechanically attach the socket.
Last edited by cjsdad; Jun 23, 2025 at 06:23 PM.
Thread
Thread Starter
Forum
Replies
Last Post



