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Discussion Starter #1 (Edited)
Hi All,

My T4 like very many others has the coolant level light on permanently. I'm about to do a VAGCOM check but here are the possible issues that the light could be caused by......and the solutions that people have found. It seems that there are many causes of the problem.


Sensor in Expansion Tank - http://www.vwt4forum.co.uk/showthread.php?t=69604
General Connections - http://www.vwt4forum.co.uk/showthread.php?t=5035
Genuine Coolant Leak - http://www.vwt4forum.co.uk/showthread.php?t=104582
Coolant needs topping up - http://www.vwt4forum.co.uk/showthread.php?t=91349
Bad earth on the Loom - http://www.vwt4forum.co.uk/showthread.php?t=104641
Coolant pressure - http://www.vwt4forum.co.uk/showthread.php?t=98853
Cracked Expansion Bottle - http://www.vwt4forum.co.uk/showthread.php?t=104641
Solder the PCB (Analogue Clocks) - http://www.vwoc.euromarques.com/technical/tales_from_the_toolbox/t4_gauges.htm
the Bible on Clocks - http://www.vwt4forum.co.uk/showthread.php?t=86937
Degrease the Expansion Bottle - http://www.vwt4forum.co.uk/showthread.php?t=85866&page=2
A broken (very small) wire on the alternator - http://www.vwt4forum.co.uk/showthread.php?t=49381


Apart form trying the soldering the clocks solution I have checked and double checked everything. I'm gonna do a VAGCOM and see if that points to the clocks issue.

The question is does anyone else know of any other reasons why the persistent little git of a red light just wont go out.

- Dice
 

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Registered
Joined
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5,746 Posts
Hi All,

My T4 like very many others has the coolant level light on permanently. I'm about to do a VAGCOM check but here are the possible issues that the light could be caused by......and the solutions that people have found. It seems that there are many causes of the problem.


Sensor in Expansion Tank - http://www.vwt4forum.co.uk/showthread.php?t=69604
General Connections - http://www.vwt4forum.co.uk/showthread.php?t=5035
Genuine Coolant Leak - http://www.vwt4forum.co.uk/showthread.php?t=104582
Coolant needs topping up - http://www.vwt4forum.co.uk/showthread.php?t=91349
Bad earth on the Loom - http://www.vwt4forum.co.uk/showthread.php?t=104641
Coolant pressure - http://www.vwt4forum.co.uk/showthread.php?t=98853
Cracked Expansion Bottle - http://www.vwt4forum.co.uk/showthread.php?t=104641
Solder the PCB (Analogue Clocks) - http://www.vwoc.euromarques.com/technical/tales_from_the_toolbox/t4_gauges.htm
the Bible on Clocks - http://www.vwt4forum.co.uk/showthread.php?t=86937
Degrease the Expansion Bottle - http://www.vwt4forum.co.uk/showthread.php?t=85866&page=2
A broken (very small) wire on the alternator - http://www.vwt4forum.co.uk/showthread.php?t=49381


Apart form trying the soldering the clocks solution I have checked and double checked everything. I'm gonna do a VAGCOM and see if that points to the clocks issue.

The question is does anyone else know of any other reasons why the persistent little git of a red light just wont go out.

- Dice
Might be stating the obvious here but your level is correct ??
 

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Discussion Starter #3
Thanks these are the things I have tried....

1) Replace Expansion Bottle
2) Check levels
3) Check, bell, clean and re-seat all wiring loom and earths
4) Checked for "Small wire on Alternator"

Basically everything but pulling the clocks and I'll do that after a VAGCOM check. Just wondering if there is anything I've missed before I pull the dash apart and start wielding a soldering iron in there.

Cheers

Dice
 

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Discussion Starter #4
Strangely enough VAGCOM says no errors even when the coolant level warning light on and the lovely three beeps. This weekend the dash will be out and the soldering iron hot!...... that is if I'm allowed off the decorating job I've been putting off for months :)
 
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