[V6-12v] Radiator Fans not switching in correctly...

[James Whitehouse]

Can I safely test for resistance on that resistor pack if the ignition is
turned off? I'd rather not disconnect the battery as this will wipe any
fault codes and the car's in on Tuesday to have those pulled! I normally
wouldn't worry, but was concerned about there being a 12v supply even with
the ignition turned off, due to the radiator run-on function. Don't want to
blow up my multimeter.

Also, is there some kind of trick to unplugging the connector on the
radiator thermo-switch? There appears to be no press-down lug on it, but
mine is VERY hard to pull off, is it literally brute force, or am I missing
something?

Cheers,
James


> -----Original Message-----
> From: Tom Christiansen [mailto:tomchr at gmail.com]
> Sent: 01 September 2006 02:42
> To: James Whitehouse
> Cc: v6-12v at audifans.com
> Subject: Re: [V6-12v] Radiator Fans not switching in correctly...
> 
> James,
> 
> Yeah... That rad fan resistor pack is bloody expensive. I recall
> paying $40 at a junkyard for the one I needed for my 1985 5000CS in
> 1999.
> 
> The resistance of a healthy pack is on the order of a few ohms. Maybe
> slightly less than an ohm. Thereabouts... A broken pack is pretty
> obvious to spot. The resistance will likely be in kohm or Mohm...
> 
> Tom
> 
> On 8/31/06, James Whitehouse <james_whitehouse1 at yahoo.co.uk> wrote:
> > Tom,
> >
> > Thanks, I know where you mean now, I'd never realized it was a resistor
> > pack.
> >
> > Do you know what the resistance spec. of a healthy pack would be? I have
> no
> > info on any of this in my manual. I've just discovered that a new
> resistor
> > pack is nearly £100, so I'm not inclined to replace it without finding
> out
> > if it has actually burned out, especially since other potentially
> suspect
> > parts (i.e. rad-fan thermo-switch and rad-fan 1st speed relay) are only
> > about £20 each.
> >
> > Cheers,
> > James
> >
> 
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