More voltage regulator questions... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jfiljr · 05-16-2007, 11:46 PM

I was having probs with charging so I converted to an internal regulator set up. Thanks for all the previous posts concerning the wiring. However, I now get 13.8V at the rear of the alternator but only 13.05 at the battery (at idle, no load)...when I increase the RPM above about 1500 I blow a 30A fuse (placed, by the PO, where the fusable link used to reside). Any thoughts?

st1x10 · 05-17-2007, 12:14 AM

I can't really help you. I was getting 14.5 at the rear and 13.5 at the alt at idle. That fuse is going to blow way faster than a fusable link. A fusable link is made to heat up and cool down to a certain extent the fuse will blow quickly if more than 30amps is applied.

jfiljr · 05-17-2007, 07:25 AM

Thanks....came to me that a 30A fuse will be blown by a 60A alternator...duh!!!

**truckdude239** · 05-17-2007, 09:00 AM

Check your wires the 30 year old wires could be badd causeing you not to get as much to the battery

05-16-2007, 11:46 PM	#1
jfiljr Registered User Join Date: Apr 2007 Location: Texas Posts: 14	More voltage regulator questions... I was having probs with charging so I converted to an internal regulator set up. Thanks for all the previous posts concerning the wiring. However, I now get 13.8V at the rear of the alternator but only 13.05 at the battery (at idle, no load)...when I increase the RPM above about 1500 I blow a 30A fuse (placed, by the PO, where the fusable link used to reside). Any thoughts?

05-17-2007, 12:14 AM	#2
st1x10 Registered User Join Date: Feb 2006 Location: Oklahoma City Posts: 588	Re: More voltage regulator questions... I can't really help you. I was getting 14.5 at the rear and 13.5 at the alt at idle. That fuse is going to blow way faster than a fusable link. A fusable link is made to heat up and cool down to a certain extent the fuse will blow quickly if more than 30amps is applied. __________________ 1970 Chevy C10 "Under Construction" 2002 Chevy S10 V6

05-17-2007, 07:25 AM	#3
jfiljr Registered User Join Date: Apr 2007 Location: Texas Posts: 14	Re: More voltage regulator questions... Thanks....came to me that a 30A fuse will be blown by a 60A alternator...duh!!!

05-17-2007, 09:00 AM	#4
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,237	Re: More voltage regulator questions... Check your wires the 30 year old wires could be badd causeing you not to get as much to the battery __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

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