1966 power window wiring harness A pillar grommets

[Bill C.]

I see the assembly manual shows a grommet put into the wire harness clearance hole in the A pillar on 63-7 models, I also see most replacement parts suppliers list the grommets as available, including the ones inside the door frame.

I also notice that Lectric Limited supplies their new harness for 63-6 with a captured type of grommet attached to the assembly and inserted with the harness into the hole in the pillar, without using the other. Very similar in design to the grommet supplied on original distributor leads and inserted into the distributor base, but larger of course.

This is completely different from the one shown in assembly manual and the repo available.

I cannot speak for how the 67 harness is supplied.

Why would the reproduction wire harness maker include this potentially incorrect, more expensive to add piece if it was not original, was there a design change during production or possibly in service harness manufacture using last design change prints? Were there two designs used?

[Scott S.]

Re: 1966 power window wiring harness A pillar grommets

I see the assembly manual shows a grommet put into the wire harness clearance hole in the A pillar on 63-7 models, I also see most replacement parts suppliers list the grommets as available, including the ones inside the door frame.

I also notice that Lectric Limited supplies their new harness for 63-6 with a captured type of grommet attached to the assembly and inserted with the harness into the hole in the pillar, without using the other. Very similar in design to the grommet supplied on original distributor leads and inserted into the distributor base, but larger of course.

This is completely different from the one shown in assembly manual and the repo available.

I cannot speak for how the 67 harness is supplied.

Why would the reproduction wire harness maker include this potentially incorrect, more expensive to add piece if it was not original, was there a design change during production or possibly in service harness manufacture using last design change prints? Were there two designs used?

Bill,

If you are referencing the Grommet on A31-A2, Item 7, GM 3869852, that part is shown in the 1965-1967 Assembly Manuals. The Revision Record in the 1965 AIM shows that the Grommet for that application changed from GM 3769566 to GM 3869852 as of 2/11/65.

The 1965 P&A (Oct. 1964 printing) shows 3869852 as the parking brake front cable grommet for 1965 Passenger cars. The 1966 P&A (Oct. 1965 printing) shows 3869852 as the "electric window wiring harness" grommet for 1965-1966 Corvette (Gr. 9.775). The 1967 P&A shows this Grommet for 1965-1967 Corvette PW wiring harness.

That's all the info I can find on this part, hopefully someone else can fill in more details.

Scott

[Bill C.]

Re: 1966 power window wiring harness A pillar grommets

Scott,
Thanks, I appreciate you effort and response. It appears the first grommet used, #3769566 is the one supplied by the repo houses currently.

I cannot find any dimensional info anywhere on its replacement # 3869852

The assembly manual does not indicate that # 3869852 is used separately as its prior part or is attached to the wire harness as the currently supplied harness is.

Does anyone have a known #3869852 and can describe it?

Bill

[Bill C.]

Re: 1966 power window wiring harness A pillar grommets

Does anyone have a late 65 thru 66 with its original power window harness still in place that can take a look and see what grommet is in place?

It can be easily detected by opening the door and sticking a finger in the slot cut for the wiring conduit in door jam and feel the harness coming thru, and be able to feel what type of grommet was used? Of course if the kick panel was not in place it could be seen from that side.

[Robert T.]

Re: 1966 power window wiring harness A pillar grommets

This is the best shot that I have from my early 66. Hope it helps.

bob

[Bill C.]

Re: 1966 power window wiring harness A pillar grommets

Hi Bob,
Yes, it does help. Thanks for your efforts as I am grateful.

Your pic shows the attached to harness type of grommet. Do you know for sure its original to the car?

It appears it would be correct based on the AIM revision Scott pointed out, assuming that is the new #3869852 part. Interesting how its called out as a separate item yet is part of the wire harness assembly as supplied?

Is your grommet (assuming original) split allowing installation over the harness when installed? The repo is not, no way to install it separately.

As far as I know, this type of grommet is not currently available from any of the usual suppliers of our repo parts but must be available from someone as they do come installed on at least Lectric Limited's harness.

They identify the harness as 63 to 66 but would be incorrect for 63-5 unless one cut off the grommet supplied. In fact, the wire color codes are not even close to correct as original for any year................


Thanks
Bill Caldwell

[Ronald L.]

Re: 1966 power window wiring harness A pillar grommets

Ask them, they will tell you its their job to know what's right for every year.

Just like the temp sender lead on the block, both my original 66BB's have had white plastic but LL says they were always black. The first car I had before LL existed and long before the service parts were discontinued.

[Robert T.]

Re: 1966 power window wiring harness A pillar grommets

Bill,

Regarding your questions: Definitley original. I know the car from day one. If I remember correctly, it was atached/molded onto the wires. I reused the harness. I can try to take a picture of the other side if I can get my wife to hold the light and the mirror.

bob

[Bill C.]

Re: 1966 power window wiring harness A pillar grommets

Bill,

Regarding your questions: Definitley original. I know the car from day one. If I remember correctly, it was atached/molded onto the wires. I reused the harness. I can try to take a picture of the other side if I can get my wife to hold the light and the mirror.

bob

Bob,
Thanks, additional pic really not needed but would show the pointed shape of that side of the grommet.
Bill Caldwell