Codes P1637 & P1638 Explanation
03-25-2015, 09:02 AM
#1
Burning Brakes
Thread Starter
Member Since: Nov 2001
Location: Statesboro Ga
Posts: 783
Likes: 0
Received 0 Likes
on
0 Posts
Codes P1637 & P1638 Explanation
I just replaced the alternator (after the original one had tested bad) and I got the following 2 error codes:
P1637 - Generator L-Terminal Circuit
P1638 - Generator F-Terminal Circuit
What exactly do these codes indicate? The description or error message in the driver info center was "Charging System Failure". At first I thought this was just due to removing and replacing alternator.
Thanks. I wanted to determine if there was anything within the Vette that may be the issue (like a fuse or whatever) or if it's the starter. The remanufactured starter has a lifetime warranty, just didn't think it'd be such a short life. At least alternator swap only takes about 10 minutes.
P1637 - Generator L-Terminal Circuit
P1638 - Generator F-Terminal Circuit
What exactly do these codes indicate? The description or error message in the driver info center was "Charging System Failure". At first I thought this was just due to removing and replacing alternator.
Thanks. I wanted to determine if there was anything within the Vette that may be the issue (like a fuse or whatever) or if it's the starter. The remanufactured starter has a lifetime warranty, just didn't think it'd be such a short life. At least alternator swap only takes about 10 minutes.
03-25-2015, 10:49 AM
#2
Le Mans Master
Your profile indicates that you have LT Headers. I would start with the connections at the starter solenoid. LT's are notorious for cooking the wires and connections at the starter solenoid. The battery and alternator connect through the connections there..........
I am assuming you have the correct Valero alternator and not some clone that "fits all",
I am assuming you have the correct Valero alternator and not some clone that "fits all",
