The charging system in the lightning is giving out on me and I need advice on how to upgrade. I've seen two yellow top batteries fit side by side in the stock battery location. I've considered installing a higher output alternator but I'm worried the output will be insufficient at idle rpm. What is the best way make sure I have plenty of voltage available, especially at idle?
low voltage, help needed...
- Thread starter Jon02SVT
- Start date
Have you tested the alternator or are you guessing that the alternator is going bad? I would suggest doing a load test on it and going from there. You can upgrade the alternator with no problems. Search around though.
I'D WIN said:
I'm running way too much for the stock alternator, keeping it isn't an option. I just need to know what works better, 2 batteries or high output alternator. Specifically, my biggest problem is when the truck is at a stop. I'm tired of having to turn things off at every stoplight :mj:
What the heck are you running? 
At idle the charding system isn't going to produce much anyways regardless of how big you go. You may want to invest in a deep cycle Optima battery if you are running "that" much. Other than that, you can go thru Mr. Alternator for a larger output alternator.
At idle the charding system isn't going to produce much anyways regardless of how big you go. You may want to invest in a deep cycle Optima battery if you are running "that" much. Other than that, you can go thru Mr. Alternator for a larger output alternator.
i would like to know what you are running also. i have two jl 500/1 and a jl 300/4 and a good amount of leds in my truck and i have the stock alter. and battery and im fine.
wow,I have 1 500/1 JL and 1 300/4 JL and 1 JLw7 10" and when my lights are on and my system is up my dash lights dim. I've thought about going with a 200A alt. What do you have in your truck?
I just have a cap on mine...does the truck with the optima
I don't recommend a 200A alternator unless your doing nothing but shows and sound-offs. The 200A tends to heat up quite a bit causing the output leads to heat up as well. If you don't upgrade all of your wiring, you run the risk of a fire. Not to mention it takes more power to drive a 200A alternator then it does to drive a stock or slightly higher output alternator.
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