SleeperScamp
Well-Known Member
1970 Plymouth Duster..As stated above. Are the side marker lamps also turn signals??Thanks..
Yes, and they are a real "trick."
They are not grounded. The two conductors from the lamp connections hook to the turn signal on that side and to the parking light or tail light buss
Here's how they work, there are several different configurations
DAYTIME, parking lights off. Turn signals off. No power to side lamps, they are out.
If you turn on the turn signal, the signal power goes to one wire of the side lamp on that side, and it "gets a ground" "in series" through the UNpowered parking lamps to ground
So in this situation, the lamp blinks on along with the signal lamp
NIGHT, parking / headlamps ON, turn signal OFF
In this case, the parking/ tail buss feeds power to one side of the side marker lamp, and it "goes to ground" through the UNpowered turn signal lamp, so the side lamp lights
NIGHT, parking/ head ON, turn signal BLINKING
In this case, in the blinking cycle, WHEN the main signal lamp is OUT, the side marker is ON just like above, because the side lamp is "getting a ground" through the UNpowered signal lamp to ground
BUT WHEN the signal lamp FLASHES ON, now you have power on BOTH SIDES of the side marker --power on one side of the lamp from the parking / tail lamp buss, and power on the other side of the lamp from the turn signal
SO IN THIS CASE the side marker blinks OFF when the main signal lamp blinks ON
So if the bulbs are good (side markers work with park lights on) and they do not blink, then where do I start?
If one of your turn signal bulbs either in the front or back is in wrong it will make your side markers blink.So if the bulbs are good (side markers work with park lights on) and they do not blink, then where do I start?
they arent supossed to flash
I agree,and since it is not.The turn signal bulbs are dual filament bulbs and if put in backwards will feed the park light and side marker light causing them to blink.then it should be a dual filtament blub.
Diagrams for how to make side markers blink can be found at Daniel Stern lighting website. Here's the key though. Your side marker fixtures will need isolated bulb sockets and a ground wire ( 2 wires, 1 filiment ) a metal chassis ground bulb socket wont work.
I made the little round side marker lights on a 68 fish blink with the turn signals by changing there bulb sockets.