I have a 73 gran sport stage 1.. the car was in fairly good condition when I purchased it. I’m fairly knowledgeable about old cars, but I’m stumped on this. Yesterday I turned the ignition on and I could here a faint buzzing with the key in the run position I switched the turn signal to the operating position and the buzzing increased in volume and there no operation of my turn signal.. anyone else have this problem?
My best guess is the turn signal flasher is going bad. I don't think I have ever had one make that much noise though...
I agree with Rich. The flasher module seems like the likely culprit. Try pulling it and maybe the noise stops? In may car it's in the drivers footwell by/on the fuse box...
I pulled the flasher and nothing changed, with the flasher out it does the same thing, thanks for responding..I will keep troubleshooting
There are 2 separate flasher units, one for the turn signals, one for the hazard flashers. Are you sure you pulled the right one?
Update. Actually I did pull the 4way flasher, found the turn signal flasher on a hanging plug. No change except when the turn signal is on the buzzing volume no longer increases. So my next question is what buzzer operates when the key is put in the ignition? I know it’s not the seatbelt buzzer. And it’s not the battery.
You do realize that there is a warning buzzer when you leave the keys in the ignition with the door open? That is normal. The turn signal system is designed so that when a bulb filament burns out, the dash signal light will stay on solid, and not flash. Have you checked ALL your bulbs? A number of them are double filament. The 1973 Buick Chassis Manual is online, https://www.teambuick.com/reference/library/73_chassis/index.php
If you don't have a hard copy, here's some on Ebay, https://www.ebay.com/itm/3640976471...a+nDjiXEom8VEM/6tVc5foUwU=|tkp:Bk9SR5D0iK6DYg https://www.ebay.com/itm/2956336237...4NoLrpbbJC2KZiX0brczzJJsU=|tkp:Bk9SR5b0iK6DYg https://www.ebay.com/sch/i.html?_fr...l1313&_nkw=1973+buick+service+manual&_sacat=0
the key buzzer is located behind the glove box. Disconnect and try if that stops the noice. Could be shorting out in the column-ignition switch. ps: welcome aboard! Fernando
Thanks I do have a hard copy.. I’ve been looking through the electrical system diagrams and wasn’t sure of the physical location for the key switch buzzer.. thanks Fernando! I’ll be crawling under the dash , thanks for everyone who responded.. will updated later.
I didn’t know that we had smart cars in 1973..(I’ll explain later) after perusing the service manual several times and removing my glove box door and box to locate the horn relay/buzzer, I noticed that the buzzing noise that I mentioned in the previous post wasn’t coming from that area, it was coming from somewhere near the fuse block… back to the service manual where I found the location of the seat belt buzzer taped to a bundle of wires, just like the manual picture shows, I removed said buzzer and the offending noise when away, but my turn signals still weren’t working, at that point I looked at the fuse block and…. you got it.. blown fuse. I’m not sure GM had this feature in mind to warn the owner of a blown turn signal fuse back in 1973 or not but I won’t forget it…smart car indeed.. thanks to everyone who helped … Howard
