JS 200 AMP alternator
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Heel & Toe
Joined: Feb 2010
Posts: 15
Likes: 0
From: Riverton, Utah
JS 200 AMP alternator
I just replaced my alternator with an aftermarket 200 AMP JS alternator and my "service charging system" light comes on but the alternator is charging properly . Anyone have this happen to them. I was deciding between a Mechman and JS and decided on JS.
Safety Car
Joined: Aug 2017
Posts: 4,924
Likes: 2,334
From: Etobicoke (Toronto) Ontario
I’ve heard of this happening when an alternator designed to operate in a c5 is swapped into a c6. While the wiring harness may plug into it, the c5 uses a different control strategy than the PWM signal that the c6 uses. The result is the message that you are seeing and some basic level of charging (maybe).
Drifting
Joined: Jul 2011
Posts: 1,825
Likes: 442
From: Boca Raton Florida
Originally Posted by Don Blackburn
I just replaced my alternator with an aftermarket 200 AMP JS alternator and my "service charging system" light comes on but the alternator is charging properly . Anyone have this happen to them. I was deciding between a Mechman and JS and decided on JS.
Drifting
Joined: Apr 2006
Posts: 1,780
Likes: 331
From: New York New York
órale, guey!
Advanced
Joined: Sep 2020
Posts: 70
Likes: 10
From: Collinsville,IL
Low idle rpm, right where you need the charge sitting in traffic with the A/c on.
I was researching the 240 Mechman and that requires raising idle speed to 850 or so rpm.
Hot rod parts that do not fit exact, such as the post carrying battery cable is sometimes clocked wrong with it near exhaust.
I still have the original 145 amp alternator, nothing great and comes up short for alot of slow cruising.
I'm looking for maybe 170 amp Mechman that charges correctly at stock idle speeds. Alot of money though.
I was researching the 240 Mechman and that requires raising idle speed to 850 or so rpm.
Hot rod parts that do not fit exact, such as the post carrying battery cable is sometimes clocked wrong with it near exhaust.
I still have the original 145 amp alternator, nothing great and comes up short for alot of slow cruising.
I'm looking for maybe 170 amp Mechman that charges correctly at stock idle speeds. Alot of money though.
Drifting
Joined: Jul 2011
Posts: 1,825
Likes: 442
From: Boca Raton Florida
Originally Posted by Z51Madison
Low idle rpm, right where you need the charge sitting in traffic with the A/c on.
I was researching the 240 Mechman and that requires raising idle speed to 850 or so rpm.
Hot rod parts that do not fit exact, such as the post carrying battery cable is sometimes clocked wrong with it near exhaust.
I still have the original 145 amp alternator, nothing great and comes up short for alot of slow cruising.
I'm looking for maybe 170 amp Mechman that charges correctly at stock idle speeds. Alot of money though.
I was researching the 240 Mechman and that requires raising idle speed to 850 or so rpm.
Hot rod parts that do not fit exact, such as the post carrying battery cable is sometimes clocked wrong with it near exhaust.
I still have the original 145 amp alternator, nothing great and comes up short for alot of slow cruising.
I'm looking for maybe 170 amp Mechman that charges correctly at stock idle speeds. Alot of money though.
