RedFred Posted June 13, 2017 Report Posted June 13, 2017 so in the Tahoe I now have the OEM 140A alt, and another 370A CES alt. I only have 2 runs of 2/0 power in the vehicle, and each run has a 200a fuse. How come when I play full tilt and drop to 12.5V, none of my fuses blow? (revving to 2.5k RPM too) Are there really over 110A being drawn by the vehicle such that my fuses are fine? Or am I missing something here?
reedal Posted June 13, 2017 Report Posted June 13, 2017 Do you have a clamp meter to measure the current being pulled through the wires? SMD Tool Map https://www.stevemeadedesigns.com/board/topic/193176-smd-tool-map-new-november-2014/ Build log https://www.stevemeadedesigns.com/board/topic/197217-reeds-03-tahoe-hat-sqaq-singer-xs-shca-cockbox-80prs/?page=32
RedFred Posted June 13, 2017 Author Report Posted June 13, 2017 9 hours ago, reedal said: Do you have a clamp meter to measure the current being pulled through the wires? I do not. I guess I just expected that a 3500 @ 0.5 and a Q4-120 @ 1.33 would be pulling 400+, especially when my voltage is dropping so low.
reedal Posted June 13, 2017 Report Posted June 13, 2017 I'd see if you can borrow a clamp meter from someone, maybe an auto parts store has one to loan or something, and see what is being pulled through the wiring when you're dropping low like that. Does it drop and hold at 12.5 or does it jump back up fast? SMD Tool Map https://www.stevemeadedesigns.com/board/topic/193176-smd-tool-map-new-november-2014/ Build log https://www.stevemeadedesigns.com/board/topic/197217-reeds-03-tahoe-hat-sqaq-singer-xs-shca-cockbox-80prs/?page=32
RedFred Posted June 13, 2017 Author Report Posted June 13, 2017 13 minutes ago, reedal said: I'd see if you can borrow a clamp meter from someone, maybe an auto parts store has one to loan or something, and see what is being pulled through the wiring when you're dropping low like that. Does it drop and hold at 12.5 or does it jump back up fast? As soon as I turn down the music it jumps right back up to 14.8V within seconds.
Kyblack76 Posted June 13, 2017 Report Posted June 13, 2017 Any bats/cells/reserve at all? I'd clamp it for sure. Make sure both are turning on and such SMD SUPER SELLER The Burban Build Blazer Build sold Acura trunk build sold
RedFred Posted June 13, 2017 Author Report Posted June 13, 2017 52 minutes ago, Kyblack76 said: Any bats/cells/reserve at all? I'd clamp it for sure. Make sure both are turning on and such G78 55aH Duracell under the hood, G31 C&D 115 aH in the rear.
reedal Posted June 13, 2017 Report Posted June 13, 2017 3 hours ago, RedFred said: As soon as I turn down the music it jumps right back up to 14.8V within seconds. Without turning it down, does it sit at 12.5 or jump back up? You may be drawing a good amount of current, just maybe not 400+ amps worth. SMD Tool Map https://www.stevemeadedesigns.com/board/topic/193176-smd-tool-map-new-november-2014/ Build log https://www.stevemeadedesigns.com/board/topic/197217-reeds-03-tahoe-hat-sqaq-singer-xs-shca-cockbox-80prs/?page=32
RedFred Posted June 13, 2017 Author Report Posted June 13, 2017 24 minutes ago, reedal said: Without turning it down, does it sit at 12.5 or jump back up? You may be drawing a good amount of current, just maybe not 400+ amps worth. It shoots up anytime there isn't a hard bass line.
Skullz Posted June 13, 2017 Report Posted June 13, 2017 Those usually pop when you exceed them by a fair amount before they blow, or when you get a short. You might not be pulling enough power all at once to pop em. I think there was a discussion on those some time back about how much more it takes for them to blow and you should be using lower rated fuses. 01 Ford focus ZX3 Pioneer AVH-X491BHS PPI PC 4800.2 Morel Maximo 6.5" x2
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