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Re: [TR] TR3A Fog/Spot Lamp wiring question #2

To: triumphs@autox.team.net
Subject: Re: [TR] TR3A Fog/Spot Lamp wiring question #2
From: cfmtr3a@verizon.net
Date: Thu, 25 Nov 2010 11:07:27 -0600 (CST)
I understand the need to wire separately and had planned on doing so except for 
the initial feed off the 'switch'.  I am not sure if I understand the 'on with 
park' or 'on with main' - controlling fog/spot with switch.  

The scheme outlined below is, I believe, a 'turn on' when needed system.  
Also,the switch is either fog or spot - cannot be both - rotary with fog on 
right; spot on left which lines up with what you are saying about placement..  

Thanks Phil for the input - I now just need to figure out the relay placement, 
the wire gauging, and color scheme..  :O)


Nov 25, 2010 04:43:45 PM, pebarnes71@gmail.com wrote:

I would wire them to operate independently, since in fog a spot lamp is 
useless/dangerous. Mount the fog on the passenger/right side, the spot on the 
left. In fog you want to see the stripe on the side of the road. When 
conditions are clear, the spot will illuminate the middle of the road for a 
long distance.If you think you're going to be driving in heavy fog, wire the 
fog lamp to come on with the parking lamps, so you aren't fighting the dipped 
beams. Similarly, wire the spot lamp to come on/off with the main beams, but be 
able to disable it via the switch.
 
Let me know if you need help with the wiring logic of this arrangement.
 
Lessons learned from years of rallying in the dark.
 
--Phil Barnes, '71 TR6 since 1977
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