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 Questions about battery isolators
#842582
10/19/07 11:25 PM
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Joined: Dec 2004
Posts: 314
OP
Mudrunner
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Hi all, I have recently decided to get a battery isolator for my '88. Question I have is that I have a one wire 115Amp chevy alternator ready to replace the anemic stock unit and I was wondering which isolator unit to buy? I'm looking at a dual batt, 200amp Cole Hersee unit but I'm not sure if the regular 48160 (3 terminal: batt 1, Alt, batt 2) or the 48162 (4 terminals - batt 1, alt, batt 2, ignition) is for me. The 48162 is stated to be for chevy applications that use AC Delco CS series on chevy or GMC that require B+ present at the output terminal. What the heck is B+ and which one would be best suited for my application? <img src="/forums/images/graemlins/confused.gif" alt="" /> Thanks in advance! Jonathan
'88 Raider 2.6L - SW Hubs, Weber 32/36, Off-road Pkg - Dead
'88 Monty 2.7L - 5" Lift, Weber 38, 33's, Dual Fans, Dual bouncy (more goodies to install) - Still Kicking.
'03 Monty Sport - XLS, BFG A/T's - Dead
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 Re: Questions about battery isolators
[Re: shadowgear]
#842583
10/19/07 11:54 PM
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Joined: Feb 2004
Posts: 10,238
Web Wheeler
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B+ is the positive post of the battery.
Some GM alternators are 1-wire units, which require excitatation of the alternator field for the alternator to begin to produce power. That 12v excitation voltage is provided to the alternator through the "Ignition" terminal on those isolator models designed to work with this type of alternator.
From your description, I'd say you need the one with the "Ignition" connection, but check the type of alternator you have and see if it's a "CS" type.
Frank
'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
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Re: Questions about battery isolators
[Re: FrankR]
#842584
10/20/07 12:11 PM
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Joined: Sep 2006
Posts: 406
Mudrunner
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Ditto.....
Frank always gets to it before me.
Ed
Yankneck = Yankee ingenuity with Redneck stupidity.
"How can I break it better?"
89 Raider 3.0 w/ 31's for now
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Re: Questions about battery isolators
[Re: yankneck696]
#842585
10/21/07 01:45 AM
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Joined: Dec 2004
Posts: 314
OP
Mudrunner
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Thanks Guys! <img src="/forums/images/graemlins/kewl.gif" alt="" />
'88 Raider 2.6L - SW Hubs, Weber 32/36, Off-road Pkg - Dead
'88 Monty 2.7L - 5" Lift, Weber 38, 33's, Dual Fans, Dual bouncy (more goodies to install) - Still Kicking.
'03 Monty Sport - XLS, BFG A/T's - Dead
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