On a 70 chevelle are the side marker lights supposed to flash when the turn signal is on.Thanks Gary

No, they stay on with the headlights/parking lights

Thank you for the quick response.

I have been wanting my side markers to flash. It seems difficult to wire up a single bulb to the circuits of two filaments in the 1157 flasher bulb.

Is there an easy way to reconnect the side markers so they will flash with the turn signals, and still retain the steady parking light?

I have been wanting my side markers to flash. It seems difficult to wire up a single bulb to the circuits of two filaments in the 1157 flasher bulb.

Is there an easy way to reconnect the side markers so they will flash with the turn signals, and still retain the steady parking light?

If you wire the ground side of the side marker to the indicator wire, it will flash alternately with the flasher and still light up with the tail lights ? I think that will work ? Someone will correct me if my theory is wrong ?

Coppertop showed us how to do it one time
Don't know if I can find the post or not.
http://www.chevelles.com/forums/showthread.php?t=54897&highlight=wink+circuit

Well I couldn't find his daigram but I think BBMike has it also.

If you wire the ground side of the side marker to the indicator wire, it will flash alternately with the flasher and still light up with the tail lights ? I think that will work ? Someone will correct me if my theory is wrong ?

Maybe, but a diode will be needed to keep the indicator from being lit all the time.
The newer cars do it somehow with the ground circuit.
My dad showed me a little tricked he used to power the lights of a small car behind his motorhome. He was having problems with voltage drop when tapping into the light circuits at the front of the car to power the factory rear lights. So he drilled an extra hole in each of the plastic rear light housings and just added another bulb that was wired directly to the motorhome thru the trailer plug. The same could be done with the side markers on your 70. A bulb with a higher candlepower will be needed to shine brighter than the side marker at night. Dad used some RTV to retain the bulb socket in the housing.

Maybe, but a diode will be needed to keep the indicator from being lit all the time.
The newer cars do it somehow with the ground circuit.
My dad showed me a little tricked he used to power the lights of a small car behind his motorhome. He was having problems with voltage drop when tapping into the light circuits at the front of the car to power the factory rear lights. So he drilled an extra hole in each of the plastic rear light housings and just added another bulb that was wired directly to the motorhome thru the trailer plug. The same could be done with the side markers on your 70. A bulb with a higher candlepower will be needed to shine brighter than the side marker at night. Dad used some RTV to retain the bulb socket in the housing.

I think my way makes the brake lights glow when the tail lights are on ? but the above would definately work.
It may melt the inside of the housing after a while though ?

If just adding a bulb for the turn signals it won't be on long enough to create the amount of heat needed to melt the housing. I need to clarify that dad used a GM socket to hold the bulb, he didn't just RTV the bulb in place. He had some from an old Chevy that were metal and had prongs that snapped into the housing, but they kept falling out so he used the RTV. If the little bulbs that are in the factory marker lights are avaiable in a brighter model they would be perfect to use. The small socket would be easy to adapt into the housing.

If just adding a bulb for the turn signals it won't be on long enough to create the amount of heat needed to melt the housing. I need to clarify that dad used a GM socket to hold the bulb, he didn't just RTV the bulb in place. He had some from an old Chevy that were metal and had prongs that snapped into the housing, but they kept falling out so he used the RTV. If the little bulbs that are in the factory marker lights are avaiable in a brighter model they would be perfect to use. The small socket would be easy to adapt into the housing.
yeah your probably right, but I wonder if you can get small twin fillament bulbs and sockets ?

Okay :D

As mentioned earlier, all the front side markers do on the '70's is illuminate steady when the parking lights and headlights are on.

If you want the "easy" way out and want to make 'em flash with the turn signal, you need to:

Find the ground wire leading to the side marker lamp. (it should be the black wire). Cut this wire. Tape up the end that leads back into the car's harness.

Take the ground wire that leads into the front side marker lamp and splice it into the turn signal wire that feeds the turnsignal filament in the corresponding light in the front bumper. Do this on each side of the car.

When the parking lights are OFF, the turn signal will cause the corresponding side marker light to blink in-sync with the turnsignals.

When the parking lights are ON, the turn signal will cause the corresponding sider maker to blink out-of-sync with the turnsignals.

This method relies on good bulbs and correct factory grounding. You are actually making a "bad ground" by using the low resistance thru the filament's off state in the front turnsignal filament.

My circuit that I designed (wow, I'll have to dig that up, I have no idea where it is now), uses an electronic module with a few parts that actually uses "logic" to determine when to flash the side marker lamp. My method (which is more time consuming) is actually superior as it does not rely on the "health" of the front turnsignal assembly. If the front bulb goes south, this your side marker won't work with the easy method I posted above.