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[TR] TR3 Backup Light

Subject: [TR] TR3 Backup Light
From: cfmtr3a at verizon.net (Carl TR)
Date: Wed, 14 Dec 2011 14:53:09 -0600 (CST)
Finally getting around to this...
 
I have an original [in box] TR3 Backup Light (Lucas L494) that I will be 
mounting on the project.  I know that there has been discussion on the list of 
different ways to mount/wire it - but I can't seem to find it in the archives.  
 
Option 1: Add an inhibitor switch on the tranny that is engaged when in 
reverse.  Not really an option as I don't want to drill/tap the tranny top 
cover.
Option 2: On/Off switch similar to the push/pull on the TR3 center panel - 
upgradable to the one with the light
Option 3: On/Off toggle switch
Option 4: Button type on/off switch (engaged when depressed - similar to a 
door/interior light switch) mounted somewhere on the tranny cover to be engaged 
when transmission is in reverse.
 
I would like to go for #4 - but not sure if I can engineer it from scratch.   
#2 or #3 would be the easiest.
 
wiring is fairly straightforward.   Green from an appropriate power point 
(ignition or elsewhere) to Switch and from switch to lamp.  Ground from lamp to 
body through fixture (andin my case also a secondary ground to an earth clip on 
chassis.  Although the power feed is ultimately fused, I will probably include 
an in-line fuse between switch & power for safety sake.
 
Any thoughts out there? 
 
Thanks
Carl

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