Jim, if you have a charger that has a start position, you might look at that
as a source. Looks like you'll need about 10 amps or so. Starting current is
100 A or so for a short time, so it might take 10 amps for long enough to
get your work done.
Brian K
On 1/12/10 5:03 PM, "Jim Franklin" <jamesf@groupwbench.org> wrote:
> On Jan 12, 2010, at 7:17 PM, John T. Blair wrote:
>>
>> Jim,
>>
>> Do you have any idea of how much current the entire trailer lighting
>> takes?
>
> The 1157s use 3 amps each, times 2, plus 4 169 running lights. 10
> amps? 12?
>>
>> Would you be willing to live with a 120V power cord plugged into the
>> wall?
>
> Absolutely. That's what I'm looking for.
>
>>
>> You'll need a 120 to 12 V transformer. The 12V side will need to be
>> rated for
>> about 1.5 times the total current the trailer needs. Then a couple
>> of diodes.
>> You could get fancy and add some filter caps and you'd be all set.
>
> Well, I don't want to spend more time sourcing/building one than I
> will using it, otherwise I'd rig up a battery & charger. I just find
> it hard to believe I can't walk into a store and buy a 12v power
> source. Surely mechanics use this all the time?
>
> jim
> _
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