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05-08-2017, 04:05 PM | #1 |
Registered User
Join Date: Oct 2005
Location: North Idaho
Posts: 335
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VetteVet - Wiring 2 for single battery diagram
VetteVet - hope you see this, as I have two questions about correctly performing the upgrades shown in the image you frequently share titled "Wiring 2 for single battery" (also attached below).
1st question - for the dark red sensing wire running from the distribution block to the alternator, is it correct to leave the original wiring in place and merely splice into the factory wire coming off the alternator? Or does the factory wire need to be eliminated entirely? What is the correct gauge for the new wire? 2nd question - Is there any harm in using 6 gauge wire from the starter solenoid to the distribution block instead of the 8 guage as shown? If using 6 gauge, should the fusible link then also be changed to 12 gauge? It appears I might have slipped a couple extra side questions in, but we all greatly appreciate the excellent help you provide to this forum. Edited to add - I forgot to mention my truck is a 1980 K10 Suburban, 12SI v-belt style 100 amp PowerMaster alternator.
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1980 K10 Suburban Silverado, original 350 w/Qjet swapped to 406sb, TH350C swapped to TH400/205 |
05-09-2017, 12:16 AM | #2 | |
Msgt USAF Ret
Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,703
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Re: VetteVet - Wiring 2 for single battery diagram
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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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05-09-2017, 12:37 PM | #3 |
Registered User
Join Date: Oct 2005
Location: North Idaho
Posts: 335
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Re: VetteVet - Wiring 2 for single battery diagram
Excellent, thanks so much for the response. I am following your diagram as faithfully as possible - I even bought the exact same junction block and am making the connections on the block in the order as shown in the diagram. Not sure if that makes any difference, but I find it satisfying to precisely follow well engineered plans. Only my j-block showed up black, dang it.
I will electrically isolate (but not completely remove) the original sensing wiring that ran back from the alternator along the valve cover to the junction in the factory harness and replace it with a 12ga. wire back to the junction block. That is what I assumed the diagram intended, but I thought it worthwhile to double check. There will still be factory systems such as the heater fan, dash lighting, power door locks and power rear window which will not be serviced through the new j-block, and I wasn't sure if those loads needed to be sensed by the alternator. The loads distributed from the junction block will include minor draws such as supplementary charging points, aux. gauge lighting and other misc. systems in the cab off a relay triggered by key on. The major draws will be headlight and aux. LED light relays and a 250W stereo amplifier always hot off the j-block.
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1980 K10 Suburban Silverado, original 350 w/Qjet swapped to 406sb, TH350C swapped to TH400/205 Last edited by SilverMiner; 05-09-2017 at 12:45 PM. |
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