Dimmer switch

[Robert B.]

Can anyone post a picture of an original dimmer switch for a '66 (I assume they were the same from at least '63 to beyond '67, but not sure) . The JG describes it as having a raised dimple on top, but is the top of the plunger otherwise flat?

Bob

[Joe L.]

Re: Dimmer switch

Can anyone post a picture of an original dimmer switch for a '66 (I assume they were the same from at least '63 to beyond '67, but not sure) . The JG describes it as having a raised dimple on top, but is the top of the plunger otherwise flat?

Bob

Bob-----


Herewith a GM #1997028:


_1.JPG

[Wayne M.]

Re: Dimmer switch

-----Herewith, a GM #1997028:

You sure, Joe ? I was under the opinion that the flat top with the middle raised pimple was the factory configuration. The one you show (service ?) is taller and has a center depression; also has a thicker base so you can barely re-use the same attaching screws.

The '65 AIM shows # 1997028, so it may vary by model year, although my Jan '70 P&A30B still shows this number.

[Robert B.]

Re: Dimmer switch

You sure, Joe ? I was under the opinion that the flat top with the middle raised pimple was the factory configuration. The one you show (service ?) is taller and has a center depression; also has a thicker base so you can barely re-use the same attaching screws.

The '65 AIM shows # 1997028, so it may vary by model year, although my Jan '70 P&A30B still shows this number.

Wayne, that is the correct part number for my car per the assembly manual, and the photo on the right is the switch that I believed to be a 1997028. I'm pretty sure the flat top design is correct!

Thanks,

Bob

[Joe L.]

Re: Dimmer switch

You sure, Joe ? I was under the opinion that the flat top with the middle raised pimple was the factory configuration. The one you show (service ?) is taller and has a center depression; also has a thicker base so you can barely re-use the same attaching screws.

The '65 AIM shows # 1997028, so it may vary by model year, although my Jan '70 P&A30B still shows this number.

Wayne------


The switch I pictured is an NOS GM #1997028. However, I do not know just when this switch was manufactured. It's possible that certain features of the switch may have changed over the years.

[Peter L.]

Re: Dimmer switch

Wayne - The p/n 1997028 Dimmer Switch was used on the 63-67 Corvettes & the configuration the judges are looking for is the one on the right in your photo & I don't think the configuration changed during the period 63-67. It is worth noting that although GM kept the p/n 1997028 dimmer switch newer versions on the switch came with the center depression in the top piece. Pete

[Robert T.]

Re: Dimmer switch

These pics are from a one owner 66, and I believe is original to the car.Bright dim foot switch.jpgBrt dim 5.jpgBrt dim sw 2.jpg

[Jim S.]

Re: Dimmer switch

I agree with Pete that the one on the right in Wayne's photo , and Robert's are the correct look .

As to the top it is either flat or a tad concaved.

Jim

[Robert B.]

Re: Dimmer switch

Thanks, guys - much appreciated! I have an NOS dimmer, but wasn't sure that is is what I think it is. Now I know!

Bob

[Rich P.]

Re: Dimmer switch

I have been able to restore original dimmer switches if anyone is interested I can post a picture or how to.

[Gene M.]

Re: Dimmer switch

Wayne - The p/n 1997028 Dimmer Switch was used on the 63-67 Corvettes & the configuration the judges are looking for is the one on the right in your photo & I don't think the configuration changed during the period 63-67. It is worth noting that although GM kept the p/n 1997028 dimmer switch newer versions on the switch came with the center depression in the top piece. Pete

Pete,
Are you saying there were configurations other than flat tops (right side Wayne's photo) used in 63-67 build? If so what years were they used? I've not experienced them in original cars. Understand that over the counter stuff is not always consistent with assembly line build.

[Rich P.]

Re: Dimmer switch

All That I have ever seen in untouched original cars (63-69) were flat top no recess.

[Gene M.]

Re: Dimmer switch

All That I have ever seen in untouched original cars (63-69) were flat top no recess.

Rich,
My experience exactly. That's why I asked the question........

[Donald H.]

Re: Dimmer switch

I realize this is an old thread, but for help to others who may be looking for a dimmer part number 1997028 I am offering my recent experience. I was looking for one for my 66 and found two NOS examples on Ebay and purchased both.

In the attached picture, the one on the left must be an example of the later version of the 1997028 as it has the depressed top. I know it is new because the can had never been opened. There's a lot of writing on the can, but the part number on the label is 1997028.

The one on the right is the correct flat topped example and came in the box on the right. I have to assume it is the original box, but since it was already opened I can't be sure.

I believe the key is if your looking for a 1997028 to meet the description in the TIM&JG just be careful. I suspect any that are sold as NOS in a parts can in my example on the left will not be correct.

Don

[Joe L.]

Re: Dimmer switch

I realize this is an old thread, but for help to others who may be looking for a dimmer part number 1997028 I am offering my recent experience. I was looking for one for my 66 and found two NOS examples on Ebay and purchased both.

In the attached picture, the one on the left must be an example of the later version of the 1997028 as it has the depressed top. I know it is new because the can had never been opened. There's a lot of writing on the can, but the part number on the label is 1997028.

The one on the right is the correct flat topped example and came in the box on the right. I have to assume it is the original box, but since it was already opened I can't be sure.

I believe the key is if your looking for a 1997028 to meet the description in the TIM&JG just be careful. I suspect any that are sold as NOS in a parts can in my example on the left will not be correct.

Don

Don------


As I've mentioned many times before, a part of a particular GM part number may change configuration in minor ways over the years of its manufacture. This is a perfect example. The pull string box on the left probably dates to the late 60's or early 70's. The box on the right is much older---probably late 50's to early 60's. The 1997028 switch was released in 1960 and discontinued in 1971 (although it was not used on Corvettes prior to 1963).