[DML] Re: Re-wire of fan relay for A/C "ON" condition
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[DML] Re: Re-wire of fan relay for A/C "ON" condition

The compressor definetly cycles as it should and if I have just a little velocity the car will stay cool, but I was roasting in stop and go freeway traffic last summer when little air was passing over the condensor. That was not fun in a virtually windowless car.

I am corrected - I should have said that the fans should cycle when the compressor is energized and not when the A/C is "on".

The black/orange wire is one of the ones in the "leftover" bundle, so I'm just guessing that when I test it I will know to reconnect it to the fan relay and it should take care of the problem. And then all I would have left are a couple of extra wires to figure out when I am around an original car.

Someone used to sell a good color wire diagram and I should probably buy one for other helpers to use, even though they are almost useless for me.

Thank you for your help.

Lee Edmonson

--- In dmcnews@xxxxxxxxxxxxxxx, Jake Kamphoefner <jakekamp@...> wrote:
> Hi Lee,
> Keep in mind that as designed, the fans should NOT always run when the A/C is 
> on.  They should only run when the compressor clutch is activating the 
> compressor.  As a result, your cooling fans will cycle in rhythm with your A/C 
> compressor.  It's also noteworthy that once you are going about 30-35 MPH, the 
> fans have no real function because there is already enough air coming across the 
> condenser.
> As for the wiring, it's wired in a manner of "who gets there first".  Either the 
> wires from the otterstat will trip the fan relay module to turn on, or the A/C 
> clutch wire.  The wire is pink as it connects to the compressor, and 
> black/orange by the time it connects to the fan relay in the relay compartment.
> There is one other thing to check: I fixed a suddenly broken A/C system for an 
> owner at DCS last year by tracing it to a dirty/loose connection at the bulkhead 
> connector.  A failure there will drive you crazy because you take for granted 
> that the signal is making it to the inside of the car.  Reading your symptoms, I 
> would almost bet your compressor isn't cycling either.
> Getting a good wiring diagram will make this a breeze for your electrical 
> engineer friend.
> Jake Kamphoefner
> 1063
> ________________________________
> From: Lee <edmonson60@...>
> To: dmcnews@xxxxxxxxxxxxxxx
> Sent: Thu, March 24, 2011 9:17:41 AM
> Subject: [DML] Re: Re-wire of fan relay for A/C "ON" condition
> I am pretty certain that the only PO modification was the new in-line relay to 
> the fans, making them run 100% of the time. This was repaired by my non-color 
> blind friend when he put the Joe Cool in for me. ( He is an electrical engineer 
> and I am certain he got it right)
> Becasue I live on the coast of Oregon, I rarely turn on my air conditioner and 
> did not realize how important it is to have the fans run to get cold air out of 
> the vents until I drove up to Bellevue, WA to have Toby Peterson do some work 
> last summer. It got way too toasty on the 6 hour drive home!
> So now with the Joe Cool installed the fans cycle when the otterstat sends a 
> signal, but only then and not when the A/C is switched on unless the otterstat 
> tells them to.
> To identify the wire from the A/C compressor that needs to be reconnected to the 
> fan relay can I just take the "left over" wires one at a time and check them 
> with a meter as I turn on the A/C?
> Lee Edmonson
> --- In dmcnews@xxxxxxxxxxxxxxx, "daveswingle2" <swingle_dmc@> wrote:
> >
> > Sinple things first. Make sure he didn't just put a jumper across the otterstat 
> >wire in the engine compartment. 
> >
> > 
> > Dave S - DMC Midwest
> > 
> [Non-text portions of this message have been removed]


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