2000 wiring harness in 2001 truck. battery flashes in message center
#1
2000 wiring harness in 2001 truck. battery flashes in message center
title says it all. i put a wiring harness from a 2k truck into my 2k1 truck. i noticed that the alternator on the 2k wiring harness only has 1 wire going to it and my 2k1 harness had 2 wires going to the alternator. my dummy center light is flashing a picture of a big red battery and it's driving me nuts. can i turn this off with HP? or do i need to add a pin/wire to my harness to shut this thing up?
#3
11 sec. Truck Mod
iTrader: (12)
Stew i have the SAME exact problem, I am using my stock stock 2000 harness though, but when i did a PCM swap i got the Same battery light flashing and have been fighting it ( or used to it) for a year now.
All the error codes that deal with this are turned off in my tune, I cant figure it out.
I also swapped to a brand new Denali cluster and still have the problem.
I hope someone has a cure.
All the error codes that deal with this are turned off in my tune, I cant figure it out.
I also swapped to a brand new Denali cluster and still have the problem.
I hope someone has a cure.
#6
PT's Slowest Truck
iTrader: (19)
When I swapped in my 02 PCM (back before guys figured out how to tune this out), my blinking battery light wouldn't turn off until I not only ran the second wire from the alternator to the PCM, but I also had to install a newer style alternator (which you should already have obviously). I don't remember which terminal or connector that I had to tap into at the PCM, but I'm sure that info is floating around here. I know that both creederado and 99silver6.0 did the same repair and one of them posted up the info that I used myself. That wire has something to do with the PCM duty-cycling the alternator, and monitoring it's output IIRC.
#7
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Join Date: Dec 2006
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Under DTC processing enablers you need to set P1638 to not reported and under DTC MIL enablers you need to set P1638 to no MIL. I believe the first one disables the diagnostics for P1638 and the second takes care of the battery light. I also went so far to System > Vehicle Platform > Vehicle Platform Options and set Alternator F terminal to No. Between the three the light is off and stays off.
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#8
Stew i have the SAME exact problem, I am using my stock stock 2000 harness though, but when i did a PCM swap i got the Same battery light flashing and have been fighting it ( or used to it) for a year now.
All the error codes that deal with this are turned off in my tune, I cant figure it out.
I also swapped to a brand new Denali cluster and still have the problem.
I hope someone has a cure.
All the error codes that deal with this are turned off in my tune, I cant figure it out.
I also swapped to a brand new Denali cluster and still have the problem.
I hope someone has a cure.
bingo. worked for me i love it when a change goes my way. it doesnt seem to happen for me very often here lately lol