Battery light comes on during hard acceleration

K

killawhale

Active member

Joined

Mar 20, 2013

Location

Burlington NC

TDI

03 Jetta Tdi Southbend Stg2 daily Diesel Geek skid plate. rolling on exors

Mar 20, 2015

• #1

I just installed dlc1019 with Malone stage 2 tune. Car runs and drives perfect. Under hard accelerating at upper rpms the battery light comes on til you let off or shift gears. Any ideas guys?

 

Vince Waldon

Top Post Dawg

Joined

Apr 25, 2009

Location

Edmonton AB Canada

TDI

2001 ALH Jetta, 2003 ALH Wagon, 2005 BEW Wagon

Mar 20, 2015

• #2

Let me be the first to say: best bet is to start by checking the clutched pulley on the alternator.

 

D

Dirtracr95

Veteran Member

Joined

Jun 24, 2013

Location

Des Plaines, IL

TDI

'13 Jetta Sedan DSG

Mar 20, 2015

• #3

2nd that

 

F

fruitcakesa

Top Post Dawg

Joined

Feb 18, 2007

Location

Vermont

TDI

04 jetta 5 spd wagon

Mar 20, 2015

• #4

If it's not the pulley then the alt is likely on the way out.

 

D

DPM

Top Post Dawg

Joined

Mar 16, 2001

Location

Newtownards, N. Ireland

TDI

2019 Rav4 AWD Hybrid, Citroen C4 BlueHDI

Mar 21, 2015

• #5

unless the loom is dodgy and is going open-circuit when the engine moves on it's mounts.

 

W

wrenchman30

Veteran Member

Joined

Oct 1, 2007

Location

arkansas

TDI

2005.5 gray 2006 dark blue

Mar 21, 2015

• #6

your belt tensioner is weak

 

K

killawhale

Active member

Joined

Mar 20, 2013

Location

Burlington NC

TDI

03 Jetta Tdi Southbend Stg2 daily Diesel Geek skid plate. rolling on exors

Mar 26, 2015

• #7

Tensioner is new along with the belt. Guess I need to take a close look at the alternator. It does still have a slight squeal.