I Keep popping 15 amp fuse - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Benlugchev · 06-08-2013, 11:50 PM

I Keep popping 15 amp fuse on my wire coming off back of alternator going to my "hot" power block

Does my wiring seem correct, it is based off research i did on this site and other forums.

Battery has 2 wires - 2ga to post of starter - neg to frame

Starter has 3 wires -2ga from + batt
- 10ga from big post to back of alternator
- purple wire from factory harness to little post

Alternator has 3 wire - 1 wire in plug that goes into computer
- 10ga coming from large post on starter
- 10ga with 15amp fuse going to constant "hot" power block

Harness only had 3 relays Fans, Fuel pump, IGN. (no other fuses)

- 2 wires coming off relays that called for "key hot"
- 5 wires coming out of harness and relays that called for "12V hot"
- 3 ground wires
- relay ground wire

Headlights/gauges are running off the stock harness/fuse box

Truck is running very rough and will barley idle. Seems to be misfiring

**truckdude239** · 06-09-2013, 12:47 AM

15 amp doesnt sound high enough depending on whats running out of that hot box
Posted via Mobile Device

Benlugchev · 06-09-2013, 07:24 AM

The hot box is running the relays for the fans, fuel pump and ignition. Along with power to the PCM and obd2 port.
Posted via Mobile Device

**truckdude239** · 06-09-2013, 12:49 PM

Your pulling to much juice though a 15 amp fuse
Posted via Mobile Device

mooseknuckles · 06-09-2013, 03:06 PM

x2...overloaded!

**truckdude239** · 06-09-2013, 05:46 PM

it probley should be around a 30-40 amp fuse i'd say

Benlugchev · 06-09-2013, 08:30 PM

Awesome thanks. I'll through in a 30 amp and she what happens.
Posted via Mobile Device

06-08-2013, 11:50 PM	#1
Benlugchev Registered User Join Date: Nov 2012 Location: Connecticut Posts: 99	I Keep popping 15 amp fuse I Keep popping 15 amp fuse on my wire coming off back of alternator going to my "hot" power block Does my wiring seem correct, it is based off research i did on this site and other forums. Battery has 2 wires - 2ga to post of starter - neg to frame Starter has 3 wires -2ga from + batt - 10ga from big post to back of alternator - purple wire from factory harness to little post Alternator has 3 wire - 1 wire in plug that goes into computer - 10ga coming from large post on starter - 10ga with 15amp fuse going to constant "hot" power block Harness only had 3 relays Fans, Fuel pump, IGN. (no other fuses) - 2 wires coming off relays that called for "key hot" - 5 wires coming out of harness and relays that called for "12V hot" - 3 ground wires - relay ground wire Headlights/gauges are running off the stock harness/fuse box Truck is running very rough and will barley idle. Seems to be misfiring __________________ 71' Chevy C10-Turbo 6.0L-80e-JFR218-738hp/700tq-10.1@133mph... 1.54 60' (3737lbs) 00' GMC-c2500-Turbo 6.0L-80e-JFR212-500hp/560tq -11.67@116mph (5182lbs)

06-09-2013, 12:47 AM	#2
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: I Keep popping 15 amp fuse 15 amp doesnt sound high enough depending on whats running out of that hot box Posted via Mobile Device __________________ 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

06-09-2013, 07:24 AM	#3
Benlugchev Registered User Join Date: Nov 2012 Location: Connecticut Posts: 99	Re: I Keep popping 15 amp fuse The hot box is running the relays for the fans, fuel pump and ignition. Along with power to the PCM and obd2 port. Posted via Mobile Device __________________ 71' Chevy C10-Turbo 6.0L-80e-JFR218-738hp/700tq-10.1@133mph... 1.54 60' (3737lbs) 00' GMC-c2500-Turbo 6.0L-80e-JFR212-500hp/560tq -11.67@116mph (5182lbs)

06-09-2013, 12:49 PM	#4
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: I Keep popping 15 amp fuse Your pulling to much juice though a 15 amp fuse Posted via Mobile Device __________________ 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

06-09-2013, 03:06 PM	#5
mooseknuckles Registered User Join Date: Sep 2009 Location: ottawa,canada Posts: 4,550	Re: I Keep popping 15 amp fuse x2...overloaded! __________________ my build threads '86 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415628 '67 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=635078 '63 GMC http://67-72chevytrucks.com/vboard/s...d.php?t=674682

06-09-2013, 05:46 PM	#6
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: I Keep popping 15 amp fuse it probley should be around a 30-40 amp fuse i'd say __________________ 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

06-09-2013, 08:30 PM	#7
Benlugchev Registered User Join Date: Nov 2012 Location: Connecticut Posts: 99	Re: I Keep popping 15 amp fuse Awesome thanks. I'll through in a 30 amp and she what happens. Posted via Mobile Device __________________ 71' Chevy C10-Turbo 6.0L-80e-JFR218-738hp/700tq-10.1@133mph... 1.54 60' (3737lbs) 00' GMC-c2500-Turbo 6.0L-80e-JFR212-500hp/560tq -11.67@116mph (5182lbs)



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