how to test wire troubleshoot GM headlight switch

ALL MY VIDEOS ARE IN 1080p HI DEF so check that out

this video is a bout the very common 4 function GM headlight switch that was around from about 67 - 88 ( im sure more years )

just going over how its wired, how to test it, how to take it apart, how to reassemble, and just other basic information

thanks for watching

[benjaminredington]

Everything anyone needs to know about these. I finally know why marker lights go out when headlights are tuned on, (and how to change it). Thank you for doing such an educational video. Well done.

[mikeminor]

Thanks for posting. Couldn’t and wouldn’t have been able to get my hard to source 63 Lemans switch working without your knowledge. Thanks

[billw]

Thanks for posting this! Working on some wiring on my '32 Chevy and this helped me figure out where the dash gauge lighting wire should be coming from. I also had to order a new switch because the ohm readings were all over the place.

[SubePelayo]

The “G” tab is for the cab dome light. The orange wire that comes from the fuse panel also splits off from the fuse panel to a dome light. So when you ground the switch out by rotating it. It activates the dome light

[sasquatchhunter]

Wow! It took a lot of work to but this video together. THANK YOU for going to this level of detail. It really helped me with troubleshooting my switch.

[adjiii]

Thanks! Great video! Been having issues with the lights in my '66 Skylark. Will bench test tomorrow.

[hydrocarbon]

Thanks for the comprehensive vid! All the other vids were useless. Thanks to this, I rebuilt my switch and figured out all the interior light issues. You also gave the only correct wire color info I could find.

[toomuchtruth]

Extremely helpful video, appreciate the detail and how you opened it up and showed us how it works. Im trying to fix my car's headlights and dodge shelling out for new parts. Thanks a million.

[DaveFormulaGTO]

This video just helped me take my switch apart and get my tail lights working again. Major thank you.

[blakeminor]

I’ve been having issues figuring out fixing a dash light problem. Thanks for the awesome video.

[parn]

Wow this is exactly what I was looking for. Im retro fitting my vaccume hideaway headlights to electric and useing this switch to open and close the doors. Thanks

[brettslater]

Thanks for making this.

I refreshed two switches today - a 7 and an 8 tab.

[MrJobcon]

Im a big fan of your videos, you are excellent at explaining and illustrating how these parts work. Thank you!

[Bob-Sacamano]

Holy shit I spent way too much time diagnosing why my front park lights would not come on and it turns out the PO installed a 7 pin switch instead of an 8 pin. THANK YOU!

[dedricbullock]

THANK YOU THANK YOU THANK YOU man this has been driving me crazy.

[rickbee]

excellent video. Was able to rebuild mine while I watched. Much thanks.

[curtisballer]

If more people did videos like this we’d all be mechanics!! One of the first 15 min videos worth watching!
Nice job man !! Subscribed!

[Iron_Thunderstorm]

VERY helpful. Have a 64 Impala that lost tail lights, blew a fuse so I jumped with a wire with alligator clips to it get home, the jumper wire got HOT and started smelling burnt! I'm deciding to replace the switch unless I test it and am able to clean up the poor connections until functional again

[jeff]

Great video, was able to test my switch and find my problem.

[shuvl]

Thanks! This was a huge help re-wiring my 55 Chevy