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Old 07-04-2020, 06:33 PM   #1
madmikeismad
 
Drives: 2012 ZL1
Join Date: Mar 2020
Location: Oklahoma City
Posts: 37
No fans w/ abs codes

Today I lost fans, hi and low speeds, ABS christmas tree came on, and "fan control 2" P0481 code popped up. I cleared the codes before realizing the fans weren't actually working, figured it was a weird fluke since I had just flashed it a few minutes ago, but they were working immediately after the flash.

I have power to the hi circuit of the relays, the fuses have power and aren't blown and I swapped them with known good ones just in case. I can jump it through the relay pin on the fuse box and get the fans to work. The "fan controller" relays are good as well and I swapped them with other known good relays just in case.

My first guess would be a ground, but I can't find any bad ones. Any ideas?

EDIT: Now the drivers window won't move more than an inch, and then it jumps up and down like it's trying to learn position or something, and then gives up and won't do anything until I key cycle.
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'12 ZL1 - RPM 5", TSP 2" headers, Speed Engineering 3" header back, Dayco 8.66 lower/LPE 2.38 upper with solid isolator and 10 bolt hub, hand ported blower and snout and went way too far, ID1050x's with DSX aux kit and E, NGK TR8's with MSD wires, 160* tstat, NW 102, self ported snout/blower, HP Tuners, Stock unopened long block

Last edited by madmikeismad; 07-04-2020 at 06:49 PM.
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Old 07-04-2020, 07:12 PM   #2
silversleeper
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Flashed ECM on a weak battery?
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Old 07-04-2020, 08:08 PM   #3
madmikeismad
 
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Quote:
Originally Posted by silversleeper View Post
Flashed ECM on a weak battery?
Nope, I figured it out. I missed a fuse. And it happened to be the one for the low side of the relays. I didn't even know that one existed lol. So there are 3 fuses, and 2 relays for the fans lol.

On a side note, it also fixed my window problems, and the abs codes stopped coming back. I'm just going to call it gm wiring and be happy it's fixed.
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'12 ZL1 - RPM 5", TSP 2" headers, Speed Engineering 3" header back, Dayco 8.66 lower/LPE 2.38 upper with solid isolator and 10 bolt hub, hand ported blower and snout and went way too far, ID1050x's with DSX aux kit and E, NGK TR8's with MSD wires, 160* tstat, NW 102, self ported snout/blower, HP Tuners, Stock unopened long block
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Old 07-04-2020, 08:25 PM   #4
Vegas Bound
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Set the fan table at 100% at 160 degrees and be done with it.
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Old 07-07-2020, 05:01 PM   #5
madmikeismad
 
Drives: 2012 ZL1
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Quote:
Originally Posted by Vegas Bound View Post
Set the fan table at 100% at 160 degrees and be done with it.
Can't go lower than 192 asfaik
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'12 ZL1 - RPM 5", TSP 2" headers, Speed Engineering 3" header back, Dayco 8.66 lower/LPE 2.38 upper with solid isolator and 10 bolt hub, hand ported blower and snout and went way too far, ID1050x's with DSX aux kit and E, NGK TR8's with MSD wires, 160* tstat, NW 102, self ported snout/blower, HP Tuners, Stock unopened long block
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Old 07-07-2020, 05:24 PM   #6
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Quote:
Originally Posted by madmikeismad View Post
Can't go lower than 192 asfaik
2013 programming must be different then.
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