I have a '70 Chevelle with a floor shift, automatic transmission, non-tilt steering column. My turn signals will not cancel after the turn is completed while driving the car and the key warning buzzer has never worked. So, I have removed the steering wheel, lock plate cover, and lock plate to see what was broke. I noticed that the turn signal lever mounting ear on the control ring is broke. Easy fix, I will replace the broken signal control ring! Then I noticed that the signal control ring was missing the canceling springs and the key warning buzzer and its retaining clip (preload spring) was also missing! So, I have ordered a new signal control ring, and L & R canceling springs, and a key warning buzzer.

1. I see the spring pocket in the signal control ring, but how should the left and right canceling springs be properly orientated?

2. I have found the slot that the key warning buzzer should go into, but I can not figure out if the buzzer goes into the slot above or below the ignition switch actuating rod "rack". With no buzzer installed this "rack" moves up and down creating a space in the slot that the buzzer should go into, just don't know which is right?

3. Does anybody have a source for the key warning buzzer's retaining clip (preload spring) Group # 2.195 GM P/N 7804419? GM discontinued in 2005. Is there a new or different part number that will help me in my search?:confused:

I think pics will help you best. I've seen some here and I'm sure someone will post or guide you to the pics. Good luck.

The 1969 through 1979 Corvette standard (non-adjustable) steering columns used the same buzzer switch as your 1970 Chevelle. Back in 1970 it used the same clip as your Chevelle. But in 1977 there is another clip that is used. It is 7830375 and is still available. There is a chance that it might work in your column in place of the 7804419.

Here is a picture of the buzzer switch and clip being installed in a standard steering column.
http://i2.photobucket.com/albums/y38/JIML82/KeyBuzzerClip.jpg

Here is a picture of a typical turn signal switch. The cancelling springs are called out.
http://i2.photobucket.com/albums/y38/JIML82/TurnSignalSwitch.jpg

Jim

Thanks alot Jim, you are the greatest!!!

How should the clip afix to the buzzer? I looks like from the photo that the preload part of the clip runs down the back side and the retaining part wraps around the bottom and up the front about a 1/4"? I have never seen one, due too the parts were not in my column.

The rack gear is also in this slot. Do you insert the buzzer in the upper part of the slot so the smooth top face of the rack will rub on the preload part of the buzzer clip? Or, does the buzzer get mounted toward the bottom part of the slot with the rack being forced up and against the rack preload spring?

Does the buzzer get both its power and ground from the two dog eared contacts or does the buzzer obtain its ground thru the clip?

The rack does not have any contact with the key buzzer switch. The key buzzer tab on the lock cylinder extends out and closes the contacts in the switch when the key is in the lock cylinder and the cylinder is in OFF, OFF-LOCK, or ACCESSORY positions.
http://i2.photobucket.com/albums/y38/JIML82/IgnitionLockCylinderDrawings-1.jpg
The spring clip extends around the non-contact end of the switch as shown in the previous picture. It just merely holds the switch in place.

The two legs of the buzzer switch contact two flat posts on the turn signal switch. Closing the switch contacts (with the driver door open) completes that circuit and causes the relay to buzz under the dash.

Jim

So, this key warning buzzer switch in the column does not make any sound, it is just a contact switch that completes a circut that causes a remote relay to make a buzzing sound.

I have read in the GM service manual that the buzzer that makes the sound is in the horn relay that is mounted on the core support. Is this the same relay that should buzz onced I get the key warning buzzer switch installed into the steering column?

I went to the local GM dealership and ordered the key warning buzzer switch clip (retainer) P/N 7830375 that you spoke of. The guy looked up what buzzer switches this clip will fit and P/N 7804414 switch showed up. This is what I was trying to get the parts guy to do the first time I spoke with him, but he would not do it! He did state that judging from what he could see on the computer screen that he thinks this clip was getting ready to become obsolete as well! So, next week when it comes in I will install it and reply to this post if it worked or did not work.

Do you think this thread should be moved to another forum to help other people? You have given me some very good technical help that would benifit other people. I am sure as these cars become more and more rare that more basket cases missing almost every thing like mine was will have to be given a second look as a possible project to restore!

Thank you again for helping me and your contribution to this site!

So, this key warning buzzer switch in the column does not make any sound, it is just a contact switch that completes a circut that causes a remote relay to make a buzzing sound.

I have read in the GM service manual that the buzzer that makes the sound is in the horn relay that is mounted on the core support. Is this the same relay that should buzz onced I get the key warning buzzer switch installed into the steering column?

I went to the local GM dealership and ordered the key warning buzzer switch clip (retainer) P/N 7830375 that you spoke of. The guy looked up what buzzer switches this clip will fit and P/N 7804414 switch showed up. This is what I was trying to get the parts guy to do the first time I spoke with him, but he would not do it! He did state that judging from what he could see on the computer screen that he thinks this clip was getting ready to become obsolete as well! So, next week when it comes in I will install it and reply to this post if it worked or did not work.

Do you think this thread should be moved to another forum to help other people? You have given me some very good technical help that would benifit other people. I am sure as these cars become more and more rare that more basket cases missing almost every thing like mine was will have to be given a second look as a possible project to restore!

Thank you again for helping me and your contribution to this site!

Well, Buzzer issues should be in the electrical forum, but I'll let it slide just this once... :D

Here's how the system works for 1970:

If the driver's side door is open, when the key is in the ignition (motor not running of course), the buzzer mechanism inside the horn relay buzzzzzzzesss. When you open the driver's side door, a special 2 connector door switch plunger grounds. One connection (the white wire) provides the ground to turn on the dome light. The other wire (the black wire) travels up the steering column to the key buzzer switch. If the key is in the slot, it presses on the switch contact and then this ground is fed to the pink wire with the black stripe. This travels down the column and thru the bulk head connector into the engine compartment to the horn relay. Since the horn relay is always hot with battery power, the ground provided on the pink with black stripe wire causes the buzzzzz.

*Special note*. Don't attempt to hook the black and white wires together at the door jamb switch. This is a special plunger switch for a reason (2 separate connections). If you do, everytime your dome light comes on, you're car will buzz at you!

FYI

The newer style/ P/N GM buzzer switch clip Jim told me about GM P/N 7830375 worked perfect as an replacement for 7804419. I was even better than the original due too the clip being "V" shaped at the tip rather than being squared off like the original, which helped lift the lock cylinder's key warning tab while inserting the said switch.

The buzzer switch and new lock cylinder is all installed now and works great!!!

Thanks Jim and Joe for your help!!!

P.S. if anyone needs this clip, I would get one soon as I was told by the parts man at the local dealership that this P/N is currently being obsoleted.