Date: Fri, 12 Oct 2007 11:22:53 -0600
Reply-To: Ben Cichowski <cichowski@MONTANA.EDU>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Ben Cichowski <cichowski@MONTANA.EDU>
Subject: Re: Cooling Fan info discrepancies
In-Reply-To: <353797.4516.qm@web52110.mail.re2.yahoo.com>
Content-type: text/plain; charset="US-ASCII"
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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