Date: Fri, 12 Oct 2007 18:38:24 -0400
Reply-To: Mike <mbucchino@CHARTER.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Mike <mbucchino@CHARTER.NET>
Subject: Re: Cooling Fan info discrepancies
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
AFAIK,
All models, two speeds.
With A/C switch on, this forces on high speed fan operation (good to get it
to stop overheating, if your fan switch is bad and your A/C compressor is
removed, like on my old '84).
Mike B.
----- Original Message -----
From: "Ben Cichowski" <cichowski@MONTANA.EDU>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Friday, October 12, 2007 1:22 PM
Subject: Re: Cooling Fan info discrepancies
> Dylan,
>
> Someone please correct me if I'm wrong, but I believe vans without AC have
> 2
> speeds (low...and high - just before overheating) just like the ones with
> AC. However, I think there is actually a "3rd speed" if you will for those
> with AC that is controlled by turning on the AC switch itself.
>
> Ben
>
>
> On 10/12/07 10:49 AM, "dylan friedman" <insyncro@YAHOO.COM> wrote:
>
>> Do vans without AC have two speeds or just one?
>>
>> curious.
>>
>> dylan
>>
>> Kenneth Wilford <kenwilfy@COMCAST.NET> wrote: Ben, if you are getting
>> both
>> speeds by jumpering the connections at the
>> fan switch plug then your low speed resistor has to be fine.
>>
>> If the fan is coming on when you jumper it at the fan plug that means
>> that the fan itself and all of the wiring, relays, resistor, fuses are
>> good to go. The only thing that can keep it from coming on at this
>> point is the thermoswitch on the radiator. I would get a infrared heat
>> gun and start taking temperature readings. Is the radiator getting hot
>> enough for the thermoswitch to turn the fan on? If it is then the
>> thermoswitch must be having a problem. You should be able to measure
>> across the switch when the temperature is up to see if it completes the
>> circuit at the proper temperature (zero resistance with an ohm meter).
>> So your problem has to be right at the radiator, at the thermoswitch.
>> You can stop hunting further. Determine if it is reaching the proper
>> temperature and then go from there.
>>
>> Hope this helps,
>> Ken Wilford
>> John 3:16
>> www.vanagain.com
>>
>> Ben Cichowski wrote:
>>> Hi All,
>>>
>>> Been reviewing archives for days in hopes of not pestering anyone about
>>> my
>>> cooling fan problems, but I'm running into a lot of conflicting info and
>>> want to trouble shoot possible reasons for my cooling fan not kicking
>>> on:
>>>
>>> This is for an '88 Vanagon Wolfburg Weekender
>>>
>>> Everything now heats properly (both sides of the radiator get properly
>>> hot,
>>> and the thermoswitch is new, so is the water pump, radiator,
>>> thermostat) -
>>> there were other problems before this one came up!
>>>
>>> Things that have been RULED OUT or, in some cases, replaced if found to
>>> be
>>> bad. (to save time on your responses)
>>> Radiator, Thermoswitch, Thermostat, Fuses, Water Pump, coolant level or
>>> quality, headgasket, cap on coolant tank, bubbles in coolant system
>>> (many
>>> good burping sessions with the front end WAY up and my prego wife at the
>>> RPM
>>> station).
>>>
>>> 1. I connected the slots on the 3-pin plug for the thermoswitch and I
>>> get
>>> both speeds to come on. Question: Does this test rule out problems with
>>> the
>>> resistor behind the headlight? - discrepancies in archives here
>>>
>>> 2. Could the relay under the dash be the cause of these problems? Some
>>> say
>>> that changing this worked for similar problems, others say that the
>>> relay
>>> could not possibly have anything to do with this.
>>>
>>> 3. I changed the ground connectors on the fan itself and behind the
>>> dash,
>>> but I'm still leaning towards this all being a problem with wiring. How
>>> the
>>> heck do you check for internal breaks in the wires given the length and
>>> tight location? Should I just change out all the wires and see if it
>>> works??
>>>
>>> Thank you so much, I know you have all probably written too much on this
>>> already, I'm jus trying to sort through what information is correct.
>>>
>>> Cheers,
>>> Ben
>>>
>>>
>>
>
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