TKO Backup Switch
Thread Starter
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
TKO Backup Switch
My backup lights have quit working so I have been doing some troubleshooting and found that my switch resistance is around 70 ohms. This is high enough that it will not let my lights come on. I checked TNBUSA's new TKO 600 this weekend and the switch resistance on his transmission is less than 1 ohm.
So, I am wondering is it possible to remove the switch from the transmission and clean the contacts to make it work again or is it just a remove and replace type deal?
Thanks for any help.
Eddie
So, I am wondering is it possible to remove the switch from the transmission and clean the contacts to make it work again or is it just a remove and replace type deal?
Thanks for any help.
Eddie
Burning Brakes
Joined: Sep 2006
Posts: 851
Likes: 10
From: Palm City, FL
They just go... because it's so close to exuast. I actually just replaced that one on my 69.... It's easy and fairly inexpensive.
Remove and replace... don't throw away anything (or break the retainer pins on the linkage, because usually your are buying ONLY the switch.
Remove and replace... don't throw away anything (or break the retainer pins on the linkage, because usually your are buying ONLY the switch.
Race Director
Joined: Sep 1999
Posts: 11,360
Likes: 382
From: Plano TX
I had the same problem. I think the problem is that the switch is not designed to handle the current our backup lights use. I added a relay to control the lights and put in a new switch and after that it has worked fine.
Also, some TKOs (like mine) came with a switch that used screw-on terminals. There's a direct replacement available that uses a weatherpack. Makes for a much nicer install/wiring.
Also, some TKOs (like mine) came with a switch that used screw-on terminals. There's a direct replacement available that uses a weatherpack. Makes for a much nicer install/wiring.
Thread Starter
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Markus, when you removed the old one did you run into any fluid when removing the old switch? Does the old switch just unscrew from the tranny or is it held in another way. I have not looked at it too much just curious as to what I will encounter.
Burning Brakes
Joined: Sep 2006
Posts: 851
Likes: 10
From: Palm City, FL
When I did mine last week, the bolts came right out without any fluid seeping out or anything of that nature... I found it to be a very easy job... in fact the hardest part was getting the switch linkage retainer pins back on.
Race Director
Joined: Sep 1999
Posts: 11,360
Likes: 382
From: Plano TX
Originally Posted by Eddie 70
Markus, when you removed the old one did you run into any fluid when removing the old switch? Does the old switch just unscrew from the tranny or is it held in another way. I have not looked at it too much just curious as to what I will encounter.
Thread Starter
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Thanks for the replies guys. This sounds like an easy one to fix. This will knock one more thing off my list of winter projects. 
Thread Starter
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Got my new switch today. Hopefully this weekend I may get a chance to get the car in the air. Not likely but, maybe.
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