The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1970 C10 Battery/Alternator/External regulator issue

Andy4639 · 03-12-2020, 10:53 PM

The wiring diagrams are your friend. You need the brown wire hooked up for it to Charge correctly. You need more juice going in the battery while driving than what you are using. So lets use this for a example. Truck running and lights on and radio on. Your using at least 12.5 to 13 volts maybe more depending on the radio and amps you have.
Lets just say 13 volts and the alternator is only charging at 12.5 volts then your not going to keep up and the battery will die. The brown wire shouldn't have anything to do with your truck over heating.

The 2 drawing I posted should be your trucks alternator wiring. The top drawing is stock. The bottom one is with the external regulator jumped and a new internal alternator installed.

03-12-2020, 10:53 PM	#3
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: 1970 C10 Battery/Alternator/External regulator issue The wiring diagrams are your friend. You need the brown wire hooked up for it to Charge correctly. You need more juice going in the battery while driving than what you are using. So lets use this for a example. Truck running and lights on and radio on. Your using at least 12.5 to 13 volts maybe more depending on the radio and amps you have. Lets just say 13 volts and the alternator is only charging at 12.5 volts then your not going to keep up and the battery will die. The brown wire shouldn't have anything to do with your truck over heating. The 2 drawing I posted should be your trucks alternator wiring. The top drawing is stock. The bottom one is with the external regulator jumped and a new internal alternator installed. Attached Images __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.