[DeTomaso] Techno question: where is this gremlin located?

[Damaadams]

Dick,
?
If you still have the original wiring setup to your radiator fans, all the current to the fans and the little fan light in the speedometer flows through the fan switch. I'm thinking that when your fans "freewheel" in the airflow they act like mini generators and send a little current flow back through the harness, including the speedo fan light. When I installed modern fans I was cautioned to put a diode in the circut to prevent that backflow. Instead I power the fans on a separate circuit directly from the battery and use the dash switch only to power a relay. That way there is no direct electrical connection between switch and fans (or between fans and speedo fan light), so current backflow isn't an issue. It shouldn't be a problem for you unless the fans generate enough juice to cause run-on after you shut the motor off. Of course, I may be all wet on this.
?
d
?
?




-----Original Message-----
From: dickruzzindesign <dickruzzindesign at aol.com>
To: cengles at cox.net; PersoCaddy at aol.com
Cc: detomaso at realbig.com
Sent: Thu, Aug 12, 2010 8:51 am
Subject: Re: [DeTomaso] Techno question: where is this gremlin located?




Another electrical question. 
    
   My fans turn so fast on the freeway from airflow through the radiator,  
   without power, that the little light that tells me when the fans are  
   on glows at about 30% of full normal brightness (when the power is to  
   the fans). 
    
   What is happening? 
   -- 
   All the best, 
   DICK RUZZIN 
   _____________________________________________________________________ 
   dickruzzinDESIGN at aol.com / Home: 313-824-0539 / Cell: 313-300-9558 
   _______________________________________________ 
    
   Detomaso Forum Managed by POCA 
    
   Archive Search Engine Now Available at http://www.realbig.com/detomaso/ 
    
   DeTomaso mailing list 
   DeTomaso at list.realbig.com 
   http://list.realbig.com/mailman/listinfo/detomaso