WTB: Headlight dimmer switch. - ZR-1 Net Registry Forums

boyking · 08-12-2015

Hi-
My headlight dimmer switch broke. I can see the broken plastic pieces/parts in the steering column, and the stalk won't snap into the "high-beam" position. Wanted to have the switch in hand before I dive into the steering column.
If anyone has one to offer, feel free to let me know your price to purchase.

Almost forgot, it has to be from/for a 1991 ZR-1, as the switch was different from 92-96.

Thanks for the help!

John

-=Jeff=- · 08-13-2015

is the dimmer at the lower part of the column bad?

or is it a piece up in the stalk by the lever?

Pictures would help, I have a spare column at home and might have what you need

boyking · 08-13-2015

Hi-
I appreciate your help! It's not the stalk. It's the actual switch on the bottom of the steering column. A photo is difficult as I have not disassembled the column. I have captured an image out of the service annual, however.
Thanks again for the assist.

John
image.jpg

WVZR-1 · 08-15-2015

Your image isn't working*** but if you can see pieces of the part "IN THE COLUMN" it is NOT the dimmer switch that's at the bottom of the column. That switch is external of the column.

If it is the EXTERNAL switch they're actually all the same. I believe I've seen the comment somewhere else about application but I can assure you that they're the same. That switch fits many cars, trucks and even some JEEP.

They seldom fail. What fails is the wiper/pivot generally at the top of the column that the stalk actually attaches to. That has applications for '90 - '93.

The generally failed part is #23 in this image and the external switch is #83. In the column it's possible that the dimmer rod actuator #21 has failed. You could see that in the column maybe. It could be black (generally) but white isn't out of the question.

http://parts.nalleygmc.com/showAssem...=0&modelYear=0

Here's an after-market image of the dimmer

http://www.wellsve.com/parts/index.php?PART_NO=UDS430

Here's an after-market image of the pivot/wiper

http://www.wellsve.com/parts/index.php?PART_NO=SW834

Here's an eBay link for #21 GM# 7827028 that you can use to inspect and ZOOM

http://www.ebay.com/sch/i.html?_from...27028&_sacat=0

*** for me on this computer it's not. On another with IE11 also it is and that's the external dimmer that you've included from the FSM. Without disassembling the column but removing only the knee bolster and it's reinforcement your first check needs to be the manual check of the rod from the pivot/wiper will actually activate the dimmer manually. You should be able to do this easily and I'm guessing you'll get the click and operation. Dimmer rod is #77 in my first link. The dimmer can be done without column removal generally and the first thing to do is secure the rod to the column before unbolting the switch. Tape or a cable tie works.

boyking · 08-15-2015

WVZR-1,
Thanks for the abundance of information. I need to go have another look to make sure I'm going in the right direction based on your comments.

Thank you very much!

John

WVZR-1 · 08-15-2015

Quote:

Originally Posted by boyking

WVZR-1,
Thanks for the abundance of information. I need to go have another look to make sure I'm going in the right direction based on your comments.

Thank you very much!

John

Hey John - I certainly hope it helps - If you need some snapshots of a column I believe either Jeff or I would be happy to help.

Just ask!

-=Jeff=- · 08-16-2015

Yep. I just finished ( well as far as I could) the swap of the 89 steering rod and tilt into a 1990 housing

08-12-2015	#1
boyking Join Date: Jul 2013 Location: New York State Posts: 42	WTB: Headlight dimmer switch. Hi- My headlight dimmer switch broke. I can see the broken plastic pieces/parts in the steering column, and the stalk won't snap into the "high-beam" position. Wanted to have the switch in hand before I dive into the steering column. If anyone has one to offer, feel free to let me know your price to purchase. Almost forgot, it has to be from/for a 1991 ZR-1, as the switch was different from 92-96. Thanks for the help! John

08-13-2015	#3
boyking Join Date: Jul 2013 Location: New York State Posts: 42	Re: WTB: Headlight dimmer switch. Hi- I appreciate your help! It's not the stalk. It's the actual switch on the bottom of the steering column. A photo is difficult as I have not disassembled the column. I have captured an image out of the service annual, however. Thanks again for the assist. John image.jpg

08-15-2015	#4
WVZR-1 Join Date: Oct 2004 Posts: 1,889	Re: WTB: Headlight dimmer switch. Your image isn't working* but if you can see pieces of the part "IN THE COLUMN" it is NOT the dimmer switch that's at the bottom of the column. That switch is external of the column. If it is the EXTERNAL switch they're actually all the same. I believe I've seen the comment somewhere else about application but I can assure you that they're the same. That switch fits many cars, trucks and even some JEEP. They seldom fail. What fails is the wiper/pivot generally at the top of the column that the stalk actually attaches to. That has applications for '90 - '93. The generally failed part is #23 in this image and the external switch is #83. In the column it's possible that the dimmer rod actuator #21 has failed. You could see that in the column maybe. It could be black (generally) but white isn't out of the question. http://parts.nalleygmc.com/showAssem...=0&modelYear=0 Here's an after-market image of the dimmer http://www.wellsve.com/parts/index.php?PART_NO=UDS430 Here's an after-market image of the pivot/wiper http://www.wellsve.com/parts/index.php?PART_NO=SW834 Here's an eBay link for #21 GM# 7827028 that you can use to inspect and ZOOM http://www.ebay.com/sch/i.html?_from...27028&_sacat=0 * for me on this computer it's not. On another with IE11 also it is and that's the external dimmer that you've included from the FSM. Without disassembling the column but removing only the knee bolster and it's reinforcement your first check needs to be the manual check of the rod from the pivot/wiper will actually activate the dimmer manually. You should be able to do this easily and I'm guessing you'll get the click and operation. Dimmer rod is #77 in my first link. The dimmer can be done without column removal generally and the first thing to do is secure the rod to the column before unbolting the switch. Tape or a cable tie works. Last edited by WVZR-1; 08-15-2015 at 11:18 AM.

08-15-2015	#5
boyking Join Date: Jul 2013 Location: New York State Posts: 42	Re: WTB: Headlight dimmer switch. WVZR-1, Thanks for the abundance of information. I need to go have another look to make sure I'm going in the right direction based on your comments. Thank you very much! John

08-13-2015	#2
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,146	Re: WTB: Headlight dimmer switch. is the dimmer at the lower part of the column bad? or is it a piece up in the stalk by the lever? Pictures would help, I have a spare column at home and might have what you need __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

08-16-2015	#7
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,146	Re: WTB: Headlight dimmer switch. Yep. I just finished ( well as far as I could) the swap of the 89 steering rod and tilt into a 1990 housing __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978