Quote:
Originally Posted by Pottsy
Allan,
When the fog is on, it consumes 1.4A (and the extra bulb is off).
When the fog is off, the two 21w bulbs (fog and extra) are running in series, so consume a total of 0.7A, ie less than having the fog on. So there is no extra power consumption (though I wouldn't worry about hanging an extra few amps off a lighting circuit anyway!)
My calcs are:
I=W/V ie 21/14.4 = 1.45A
R=V/I ie 14.4/1.45 = 10 ohm
In series: 20 ohm, so I=V/R ie 14.4/20 = 0.7A
|
Pottsy,
Your electrical skills are obviously better than mine- is there enough capacity to say fit a twin filament bulb 5w/21w, the 5w for tail light and the 21w for the fog light. With the bulbs wired in parallel?
This would make the existing fog light a tail light, while retaining the fog light capability - the existing blank would then become a dual tail/fog light.
There are certainly cars around with three bulbs per side for tail lights so brightness shouldn't be a problem - Volvo 480 for instance.
Mike