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post #1 of (permalink) Old 12-18-2000, 12:16 PM
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Lights & Battery ?

As a gift during this holiday season I was considering getting a light bar and lights (five lights across the bar) for my Bronco. I was wondering if I was going to also need to make any modifications to my current battery? With the addition of more "stuff" attached to my current, standard battery, would it be wise to add a second auxillary battery or upgrade to a more versatile battery (Optima brand comes to mind)?
I recently added a security system and two lights on my grill guard to my battery.
Any comments are appreciated.

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post #2 of (permalink) Old 12-18-2000, 04:13 PM
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Re: Lights & Battery ?

The electrical accessories don't run off the battery, except when the engine is off. What you need to address is the alternator. If you draw more current (amps) than the alt puts out, your batteries (no matter how many) will eventually run down and the truck will stall and not recrank. If you have a 100A alternator, you can't run stuff that pulls a total of more than maybe 95A continuously. Even then, you may burn some fusible links or fuses. Add up the draw of each thing you want to run (in amps) and don't forget the A/C clutch and blower motor - they pull a lot. Alternatively, crank the truck, turn everything on, and watch the volt gauge. If it drops below 12V, you need to have it checked and maybe upgraded.

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