Flashing battery light after multiple mods at once?
05-29-2016, 11:16 AM
#1
Flashing battery light after multiple mods at once?
Truck in question is a 99 2wd Sierra. I had my trans let loose so I had to pull it to rebuild. At that time I figured I would do a few mods at the same time to save on down time. Here's a list of what all was done.
Rebuilt trans (original was rebuilt)
Pcm tune by blackbear (original was sent in and sent back)
Speed engineering lt's
Deleted egr, rear o2's, and cats
Yesterday was the 1st start in over a month. The battery is a optima yellow top that's only a few months old and was pulled from the truck when I lost the trans and sat on my work bench. Volt meter is reading just above 14 and everything is working correctly. I drove it around for a hour yesterday. I've looked over all my wiring around the headers and nothing looks disturbed. Any ideas?
Rebuilt trans (original was rebuilt)
Pcm tune by blackbear (original was sent in and sent back)
Speed engineering lt's
Deleted egr, rear o2's, and cats
Yesterday was the 1st start in over a month. The battery is a optima yellow top that's only a few months old and was pulled from the truck when I lost the trans and sat on my work bench. Volt meter is reading just above 14 and everything is working correctly. I drove it around for a hour yesterday. I've looked over all my wiring around the headers and nothing looks disturbed. Any ideas?
05-30-2016, 05:29 PM
#4
TECH Fanatic
You're not likely to get anything from OBD if you pull codes with a generic. You'd need a Tech II to see alternator errors (think it's P1637 or 38). But making them go away is nigh impossible- you can even set them to no error reported or disabled and the battery light still flashes and the code still sets (in Tech II).
05-31-2016, 11:07 AM
#5
You're not likely to get anything from OBD if you pull codes with a generic. You'd need a Tech II to see alternator errors (think it's P1637 or 38). But making them go away is nigh impossible- you can even set them to no error reported or disabled and the battery light still flashes and the code still sets (in Tech II).
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07-01-2016, 12:29 PM
#8
All you have to do is change the alternator terminal options in the platform section of the tune when switching from a 99-00 to an 02 OS
No need to rewire or turn lights off.
a 1999 OS has Terminal L only. Terminal F is OFF
a 2002 OS has Terminal L and Terminal F both turned ON.
Just turn Terminal F OFF in the 2002 OS under the GMT800 Platform when using on a 99-00 truck.
No need to rewire or turn lights off.
a 1999 OS has Terminal L only. Terminal F is OFF
a 2002 OS has Terminal L and Terminal F both turned ON.
Just turn Terminal F OFF in the 2002 OS under the GMT800 Platform when using on a 99-00 truck.
Last edited by 1FastBrick; 07-01-2016 at 01:03 PM.
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