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Thread: Alternator functionality
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11-01-2017, 09:21 PM #1The Nitrous Outlet Junkie
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Alternator functionality
I converted my car to carb and got rid of the PCM and wiring harness I'm now running into problems getting the alternator to charge the battery ... I took it off and had it tested three different places alternator is fine how do I get it to charge the battery though. I think it has something to do with the Exciter wire.
A few places people told me to use a 470 Ohm resistor but I'm not sure what to do with that.94 Formula "budget build" #thebeaterbird
10.177 @128.31 on a lil 250 shot
350, LT1, carb, LE grind cam, th400, 4k stall, ford 8.8 w/ 4.10s
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11-01-2017, 09:23 PM #2Xtreme Member
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Supporting Member2021 Charger Scat 392
1994 Firebird Formula 381 stroker - Carrying the torch! - 9.90 @ 134.3mph on a 200 shot
The wrench/driver for LTConvert's 94 Z28- Ellwein 383/LE Trickflows/ D1SC / CPT Ultra Pro Race 4L60E
10.78 @ 125mph. Shooting for 9.99 for Frank Cahall!
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11-01-2017, 09:25 PM #3The Nitrous Outlet Junkie
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The other thread was for me to figure out how to get my voltmeter to function I've got that working now. thanks for your help.
However I now know my problem is not with the voltmeter but the alternator and I know very little about how Electronics work so please forgive me for reaching out for help
Sent from my SM-N910T using Tapatalk94 Formula "budget build" #thebeaterbird
10.177 @128.31 on a lil 250 shot
350, LT1, carb, LE grind cam, th400, 4k stall, ford 8.8 w/ 4.10s
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11-01-2017, 09:27 PM #4Xtreme Member
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Supporting Member12v positive to switch, out of switch to resistor, then crimp connector to exciter wire/plug
voltage gauge wired thru a switch, then to the charging wire that runs from battery positive to alternator
that's how both need to be wired.
Sent from my SAMSUNG-SM-G935A using Tapatalk2021 Charger Scat 392
1994 Firebird Formula 381 stroker - Carrying the torch! - 9.90 @ 134.3mph on a 200 shot
The wrench/driver for LTConvert's 94 Z28- Ellwein 383/LE Trickflows/ D1SC / CPT Ultra Pro Race 4L60E
10.78 @ 125mph. Shooting for 9.99 for Frank Cahall!
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11-01-2017, 09:29 PM #5LTX Regular
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He did tell you how to use it. Connect one end of the resistor to the exciter wire and the other end of the resistor to a switched ignition point.
1998 Trans Am - LS1/A4 - all stock and almost all original - one owner - driven daily.
Author of Scan9495, free pc apps 93-95 LT1,94/95 L32: http://ltxtech.com/forums/showthread...light=scan9495
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11-01-2017, 11:37 PM #6LTx Guru
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I posted the factory wiring diagram in the other thread, showing the location of the resistor, and how to incorporate it into the voltage gauge and exciter circuit, but that didn't seem to help.
SOLD - GONE TO A (VERY) GOOD HOME ! - 94 Formula A3+1: 381ci forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / CC solid roller / TH400+GearVendors OD / 4.11 Strange 12-bolt / 300-shot N2O / Spohn Suspension / roll bar / MoTeC M48 Pro engine management system /a few other odds 'n ends.
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11-02-2017, 12:01 AM #7The Nitrous Outlet Junkie
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Sorry for wasting your times
Sent from my SM-N910T using Tapatalk94 Formula "budget build" #thebeaterbird
10.177 @128.31 on a lil 250 shot
350, LT1, carb, LE grind cam, th400, 4k stall, ford 8.8 w/ 4.10s
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11-02-2017, 05:37 PM #8The Nitrous Outlet Junkie
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Fingers crossed
Sent from my SM-N910T using Tapatalk94 Formula "budget build" #thebeaterbird
10.177 @128.31 on a lil 250 shot
350, LT1, carb, LE grind cam, th400, 4k stall, ford 8.8 w/ 4.10s
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11-02-2017, 06:42 PM #9The Nitrous Outlet Junkie
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Well that didn't work ..... I connected it to the switch for my ignition and ran it straight to the alternator single wire connected to the plug any ideas why it won't work?
Sent from my SM-N910T using Tapatalk94 Formula "budget build" #thebeaterbird
10.177 @128.31 on a lil 250 shot
350, LT1, carb, LE grind cam, th400, 4k stall, ford 8.8 w/ 4.10s
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11-02-2017, 08:47 PM #10LTX Regular
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Try measuring the voltage at the resistor end connected to the alternator. It should have about 12v when the ignition switch is on.
How are you determining that the alternator is not working?
By the way, that looks like good work on the resistor insulation.
1998 Trans Am - LS1/A4 - all stock and almost all original - one owner - driven daily.
Author of Scan9495, free pc apps 93-95 LT1,94/95 L32: http://ltxtech.com/forums/showthread...light=scan9495
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