New CS144 Alternator+Big 3
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Thread Starter
Heel & Toe
Joined: Nov 2025
Posts: 21
Likes: 5
New CS144 Alternator+Big 3
I installed a new CS144 alternator and replaced the positive and negative wires with 0 gauge to upgrade for upcoming stereo build. I also purchased the 10si to cs144 adapter that has the resistor in the wire. It's charging at 14.4 volts and seems to be working great. One thing though, the alternator light on the dash stays on. Not sure if it's worth mentioning, but I also installed all led bulbs in the the dash, but that bulb didn't come on prior to swapping alternators. Any thoughts? I really don't want to have that light on, I want it to work properly.
Last edited by ']['HRUS']['; Feb 27, 2026 at 11:07 PM. Reason: typos
Race Director
Joined: May 2006
Posts: 18,755
Likes: 2,589
I installed a new CS144 alternator and replaced the positive and negative wires with 0 gauge to upgrade for upcoming stereo build. I also purchased the 10si to cs144 adapter that has the resistor in the wire. It's charging at 14.4 volts and seems to be working great. One thing though, the alternator light on the dash stays on. Not sure if it's worth mentioning, but I also installed all led builbs in the the dash, but that bulb didn't come in prior to swapping alternators. Any thoughts? I really don't want to have that light on, I want it to work properly.
Race Director
Joined: Mar 2017
Posts: 11,960
Likes: 4,516
From: Virginia
If the bulb isn't illuminated, does it matter if it's an LED? What happens if you swap it out for an incandescent?
Though I suspect that resistor is intended to replace (delete) the bulb function.
EDIT: More discussion here:
https://www.corvetteforum.com/forums...de-wiring.html
Though I suspect that resistor is intended to replace (delete) the bulb function.
EDIT: More discussion here:
https://www.corvetteforum.com/forums...de-wiring.html
Last edited by Bikespace; Feb 25, 2026 at 12:03 AM.
Racer
Joined: Apr 2008
Posts: 406
Likes: 46
From: Lebanon OH
I've not done the alternator conversion, so I'm not sure what the purpose of the in-wire resistor is, but there will be a voltage drop across that resistor. Did you take your charging measurement at the alternator output, or at the battery terminal? If that drop causes the voltage at the charge sensing circuit to dip below the threshold, the light will come on. Is there a way to take the resistor out of the circuit for a test so see if removing it causes the light to go out? Hope this helps.
MajD
MajD
Thread Starter
Heel & Toe
Joined: Nov 2025
Posts: 21
Likes: 5
If the bulb isn't illuminated, does it matter if it's an LED? What happens if you swap it out for an incandescent?
Though I suspect that resistor is intended to replace (delete) the bulb function.
EDIT: More discussion here:
https://www.corvetteforum.com/forums...de-wiring.html
Though I suspect that resistor is intended to replace (delete) the bulb function.
EDIT: More discussion here:
https://www.corvetteforum.com/forums...de-wiring.html
Thread Starter
Heel & Toe
Joined: Nov 2025
Posts: 21
Likes: 5
I've not done the alternator conversion, so I'm not sure what the purpose of the in-wire resistor is, but there will be a voltage drop across that resistor. Did you take your charging measurement at the alternator output, or at the battery terminal? If that drop causes the voltage at the charge sensing circuit to dip below the threshold, the light will come on. Is there a way to take the resistor out of the circuit for a test so see if removing it causes the light to go out? Hope this helps.
MajD
MajD
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Thread Starter
Heel & Toe
Joined: Nov 2025
Posts: 21
Likes: 5
This is the adapter I purchased. Does anyone know which pins on the CS144 side should be used? I haven't looked but I believe it's Pin 1 & pin 3. Will have to double check next time I'm up at the Manshack.
Last edited by ']['HRUS']['; Feb 26, 2026 at 07:50 PM. Reason: adding URL
