Dumb Indicator Light Problem - 1970
Thread Starter
Drifting
Joined: Mar 2003
Posts: 1,608
Likes: 3
From: Canberra AUSTRALIA
St. Jude Donor '05-'06
Dumb Indicator Light Problem - 1970
Have a 1970. The amber lights on the left and right SIDE of the front fender light up with the headlights but DO NOT flash when the front turn signals (indicators) flash. Is this normal for a 1970?
A friend has a 1972 and his fender lights flash out of sync with the front turn signals but they DO flash.
What do yours do?
Thanks in advance.
Pete
A friend has a 1972 and his fender lights flash out of sync with the front turn signals but they DO flash.
What do yours do?
Thanks in advance.
Pete
Race Director
Joined: Jun 2000
Posts: 10,049
Likes: 675
From: FL
The fender lights should flash and they do flash out of sequence. It has to do with how GM grounded the bulbs to make them flash since they only have one filament in them. If they are not flashing, check the bulbs then all the wiring.
Race Director
Joined: Jun 2000
Posts: 10,049
Likes: 675
From: FL
Pete,
Found the info I used to help trouble shoot my '75. Fortunately, most of the systems are the same:
http://www.corvetteforum.net/c3/tune...l/index6.shtml
Basically, when I hit my horn, my indicator lights came on. Bad ground from the radiator to the frame. This page has some great info on how the turn signals and such work.
Later,
Steve
Found the info I used to help trouble shoot my '75. Fortunately, most of the systems are the same:
http://www.corvetteforum.net/c3/tune...l/index6.shtml
Basically, when I hit my horn, my indicator lights came on. Bad ground from the radiator to the frame. This page has some great info on how the turn signals and such work.
Later,
Steve
Melting Slicks
Joined: Mar 2005
Posts: 2,095
Likes: 299
From: Midlothian VA
On 71 & 72 year models, the front side markers flash "out of sync" from the front turn signals when the headlights are on; they flash "in sync" with the front turn signals when the headlights are off. Don't know that the side markers flash at all on a 70 though.
Last edited by Hammerhead Fred; Sep 7, 2005 at 02:44 AM.
Race Director
Joined: Nov 1999
Posts: 10,643
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From: Foxfield CO 1970 Convertible
Hmmm...I never thought the side marker lights on my '70 were part of the turn signals. I'll check the schematics when I get home tonight...
Aha! Just as I thought. The side marker lights on the '70 are not connected to the signals.
Aha! Just as I thought. The side marker lights on the '70 are not connected to the signals.
Last edited by Z-man; Sep 8, 2005 at 02:10 AM.
Thread Starter
Drifting
Joined: Mar 2003
Posts: 1,608
Likes: 3
From: Canberra AUSTRALIA
St. Jude Donor '05-'06
Z-man,
According to the later C-3 schematics they ground the light to get it to flash.
It does appear that for our year that the marker ight has +12v and ground and no connection to the marker cct.Checked all my grounds and all seems good.
Anyone else have a 70 that the marker lights DO or DON'T flash???????
Thanks,
Pete
I cannot tell if the 70 schematic is the same as laer years at first look. Going to keep tracing.
According to the later C-3 schematics they ground the light to get it to flash.
It does appear that for our year that the marker ight has +12v and ground and no connection to the marker cct.Checked all my grounds and all seems good.
Anyone else have a 70 that the marker lights DO or DON'T flash???????
Thanks,
Pete
I cannot tell if the 70 schematic is the same as laer years at first look. Going to keep tracing.
Racer
Joined: Feb 2005
Posts: 336
Likes: 0
Originally Posted by Z-man
Hmmm...I never thought the side marker lights on my '70 were part of the turn signals. I'll check the schematics when I get home tonight...
Aha! Just as I thought. The side marker lights on the '70 are not connected to the signals.
Aha! Just as I thought. The side marker lights on the '70 are not connected to the signals.
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Race Director
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From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
My 70 side marker lights do not flash either. I tried with the headlights on also just for kicks.
Race Director
Joined: Nov 1999
Posts: 10,643
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From: Foxfield CO 1970 Convertible
I wonder if there are Vettes that have poor grounds or weak electronics that cause the side marker lights to *appear* to flash when the blinkers are on - and it's just the extra current draw that makes the side markers dim. That would explain the "opposite" flashing...
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Joined: Feb 1999
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From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
My car is 9790 so you can compare that to your car if that would help in determining early or late.
Melting Slicks
Joined: Dec 2003
Posts: 2,487
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From: Sydney
I just went and checked the side marker operation on my 70:
The side markers turn on when I have the headlights on.
The side markers do not flash with the turn signal on.
My 70 is an early 70 (January build).
The side markers turn on when I have the headlights on.
The side markers do not flash with the turn signal on.
My 70 is an early 70 (January build).
Race Director
Joined: Nov 1999
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From: Foxfield CO 1970 Convertible
Originally Posted by Eddie 70
My car is 9790 so you can compare that to your car if that would help in determining early or late.
Thread Starter
Drifting
Joined: Mar 2003
Posts: 1,608
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From: Canberra AUSTRALIA
St. Jude Donor '05-'06
Thanks everyone so far.
Mine is 16531. I think that is a late build as they only made about 17500 that year.
In my other post someone mentioned light bulbs. Changed them. No difference.
I would like to know the build number of peoples cars that do flash.
This riddle is yet to be solved!
Cheers,
Pete
Mine is 16531. I think that is a late build as they only made about 17500 that year.
In my other post someone mentioned light bulbs. Changed them. No difference.
I would like to know the build number of peoples cars that do flash.
This riddle is yet to be solved!
Cheers,
Pete
Last edited by stingry; Sep 12, 2005 at 11:19 PM. Reason: add thanks
Thread Starter
Drifting
Joined: Mar 2003
Posts: 1,608
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From: Canberra AUSTRALIA
St. Jude Donor '05-'06
But wait there is more....
Looks like it is a bulb issue. I have changed from the "orange" bulb to clear WTF??? Apparently this may be the problem.
http://forums.corvetteforum.com/show...post1552046986
Looks like it is a bulb issue. I have changed from the "orange" bulb to clear WTF??? Apparently this may be the problem.
http://forums.corvetteforum.com/show...post1552046986
Race Director
Joined: Nov 1999
Posts: 10,643
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From: Foxfield CO 1970 Convertible
It seems to me that, unless your wiring is different than the schematic, you would have to have "Xmas tree" type self-flashing bulbs to get the markers to flash. There isn't a flasher in the circuit. (And then they would flash all the time they were on).
Thread Starter
Drifting
Joined: Mar 2003
Posts: 1,608
Likes: 3
From: Canberra AUSTRALIA
St. Jude Donor '05-'06
Originally Posted by Z-man
It seems to me that, unless your wiring is different than the schematic, you would have to have "Xmas tree" type self-flashing bulbs to get the markers to flash. There isn't a flasher in the circuit. (And then they would flash all the time they were on).
Do your marker lights flash when the emergency flasher is pressed?
Well this is seems like an epic larger then Star Wars. I went and changed all my bulbs and checked my flasher. I have the following:
All Marker Lights - 168 Bulbs (single filament)
All Turn Signals - Orange Bulb 1157A (double filament)
Reverse Lights - 1141 Clear Bulb
Flasher - Heavy Duty - 536
I am starting to trace the schematic tonight. I have a 72 manual to compare to my 70 manual. See if they are the same or diiferent. I have a friend with a 72 and his marker lights flash as do some other people o the forum.
I need the corvette fairy to come and fix my lights!
Cheers,
Pete
Instructor
Joined: Aug 2005
Posts: 107
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From: Mishawaka Indiana
False Alarm
False Alarm. Man, I appologize. I could absolutely, positively, swear that my corner lamps blinked because I just put the lights back together a few months ago after paint, and I put in new bulbs where needed and double checked all of them for function. Well, after this thread got started, I decided to go out and check them so I could report back. Well they are NOT blinking. They stay nice and steady when the signals are blinking, which would seem to match the schematic shown in the earlier post.
I guess I was mistaken. Sorry about that. I still think a gremlin must have snuck out and changed them. I was really sure they blinked as recently as a couple weeks ago, when I checked the bulbs again. The only thing, is I know I have a bad ground on one of the rear tail lamp housings. But I dont know that that would do anything with the corners. Its possible I have a fluke scenario here and I will keep an eye on them, but they really appear for the moment like they are not supposed to blink.