Vintage Air voltage drop - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jchav62 · 03-20-2020, 09:23 PM

Hi all! Not too long ago i purchased a used vintage air setup from a fellow member. It's been installed for a while. I'm finally going to take it in for some r134 tomorrow.

Anyhow, i just notice that when I turn the fan on, the voltage drops to just under 12 volts (aftermarket gauge) and the Gen light faintly comes on. With the multimeter, it still read about 14 volts at the battery, but about 11-12v at the fuse box. The higher the fan speed, the lower the volts. I have converted to an internally regulated alternator. Any ideas on what's causing this voltage drop?

Thanks... and wish everyone all the best during these crazy times.. stay healthy

JC62

03-20-2020, 09:23 PM	#1
jchav62 1962 C-10 Join Date: Apr 2005 Location: Las Vegas, New Mexico Posts: 4,978	Vintage Air voltage drop Hi all! Not too long ago i purchased a used vintage air setup from a fellow member. It's been installed for a while. I'm finally going to take it in for some r134 tomorrow. Anyhow, i just notice that when I turn the fan on, the voltage drops to just under 12 volts (aftermarket gauge) and the Gen light faintly comes on. With the multimeter, it still read about 14 volts at the battery, but about 11-12v at the fuse box. The higher the fan speed, the lower the volts. I have converted to an internally regulated alternator. Any ideas on what's causing this voltage drop? Thanks... and wish everyone all the best during these crazy times.. stay healthy JC62 __________________ Joseph Chavez "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4



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