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Old 12-28-2011, 01:29 AM   #1
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Join Date: Sep 2010
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Posts: 58








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First look

at the three photos</span>



The

switches I use are Double Pole Double Throw with centre OFF (DPDT w C off) 125V

ca 6 amps</span>



The current

draw is ; High two bulbs :1.5 amps</span>



</span>High one

bulb :</span>0.75 amp</span>



</span></span>Low two bulbs :</span>0.25 amp</span>



I used home

extension wire </span>#16 or 18 to wire

everything.</span>



</span>Never put a fuse higher than 15 amperes </span>on a lighting circuit </span></span>



How to

modify a 2 bulbs 12 volts fixture to a 3 intensities fixture for $ 1.00.</span>



Buy the

switches in a surplus electronics parts for 1.00 or less if you buy 10 or 20 or

maybe on internet because you will transform many fixtures.</span>



</span></span>



Take the

fuse off the circuit. </span>



Remove the

fixt. </span>By sliding the plastic lenses and

unscrewing </span>the screws.</span>



Disconnect

the wires connecting the fixture..If it is a crimped connector, cut the wires

close to it, you will use twist connectors to reconnect .</span>



Drill a

hole on the side of the fixt.close to the ceiling to give maximum clearance for

your head(see photo) </span>Check clearance

inside the fixture too.</span>



You have to

use a double pole double throw </span>switch ;

if you use two separate single pole double throw switches good </span>tluck</span>



With a DPDT

without the center off, </span>wire the O.S. on

position D and loose the one bulb possibility</span>



One bulb

has </span>3 wires; one on one side and two on

the other side. Cut the shorter of the two.</span>



Solder a

jumper between L1 and L2,,</span>



I did not

twist the wires around the pins, I just contact and solder ; it held no problem

from 2004.</span>



When

finished check that soldered spots don’t touch then </span>



</span>check with a portable drill battery up to 14

volts if everything works ok.</span>



I am

explaining what I did without problems on more than 50 mods butI am not

responsible for your errors or defective material or errors on the text or

schematics.</span>



If

unsure </span>contact a licenced technician on

RV wiring code..</span>



If

something is not clear ask me </span>questions.

Don’t be shy. </span>Good luck and keep the

beers for after the job. It tastes so much better then.



</span>



</span>



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Old 12-28-2011, 01:50 AM   #2
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Just to be clear, this project was to take the original 2 bulb fixtures and be able to dim down either 1 or 2 bulbs?

It's a little confusing on the purpose.

Thx.
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Old 12-28-2011, 02:09 AM   #3
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Hi Denism28,

Nice mod. So, with the original swich(O.S.) off and the new switchat center off, we get no light. From here, I'm going to attempt a truth table:

O.S. | New | Result

Off| C| All Off (OFF)

Off | L | 2 bulbs in series (LOW)

Off | H | 1 bulb (MED)

On | H | 2 bulbs in parallel (HIGH)

Is this right? I've converted all of my lights to LED so I won't be able to try this one.
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Old 12-28-2011, 02:18 AM   #4
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Quote:
Originally Posted by r2millers
Just to be clear, this project was to take the original 2 bulb fixtures and be able to dim down either 1 or 2 bulbs?

It's a little confusing on the purpose.

Thx.
Bob You get 3 intensities: 2 bulbs as before max lighting
1bulb only half lighting
2 bulbs in series very cosy candlelight type lighting
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Old 12-28-2011, 02:29 AM   #5
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Quote:
Originally Posted by casmith
Hi Denism28,

Nice mod. So, with the original swich(O.S.) off and the new switchat center off, we get no light. From here, I'm going to attempt a truth table:

O.S. | New | Result

Off| C| All Off (OFF)

Off | L | 2 bulbs in series (LOW)

Off | H | 1 bulb (MED)

On | H | 2 bulbs in parallel (HIGH)

Is this right? I've converted all of my lights to LED so I won't be able to try this one.
You are pretty close. with O.S.on or off on C all off
O.S. on or off on L candlelight
O.S. on on H 2 bulbs
O.S. of on H1 bulb
I think it would work just the same with LEDS, give it a try on the workbench I dont see why not.
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Old 12-28-2011, 09:10 AM   #6
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The LED option will most likely become more prevalent as Crossroads is suppose to switch over to 100% LED both inside and out....



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