[DeTomaso] Water temp gauge change with headlights

[Ken Green]

I'm not sure how it applies here, but the instructions for the FAST XFI ECU state that the biggest problem their customers have is sharing the ground for the ECU.  It's not just a matter of simple resistance, other electrical phenomena (inductance, capacitance, etc.) comes into play.
 
Ken

From: "shawkins777 at comcast.net" <shawkins777 at comcast.net>
To: MikeLDrew at aol.com 
Cc: SOBill at aol.com; detomaso at realbig.com 
Sent: Tuesday, May 29, 2012 11:49 AM
Subject: Re: [DeTomaso] Water temp gauge change with headlights



I like Mikes idea, I work in the wholesale electric generation business and it's common on the electronics to daisy chain grounds but you need to have the proper size wire to do this. 



Steve 



----- Original Message -----


From: MikeLDrew at aol.com 
To: SOBill at aol.com 
Cc: detomaso at realbig.com 
Sent: Tuesday, May 29, 2012 2:18:11 AM 
Subject: Re: [DeTomaso] Water temp gauge change with headlights 


In a message dated 5/28/12 22 17 20, SOBill at aol.com writes: 


>   
>  The solution is run a separate ground wire from the temp gauge ground 
> terminal directly to the chassis. 
>    
>  The proper way to ground anything is the eliminate "daisy chained" 
> grounds in which the ground current from one circuit can mix with the ground 
> current from another circuit. But this takes a lot more wire and fabrication 
> time. Each component should have it's own, separate ground to the chassis. 
> 
> 

My thought was to run a big, meaty ground wire from the water temp gauge to 
ground.   The fact that the other gauges are tied in to it means they 
should benefit as well. 

Maybe a project for tomorrow...we'll see.... 

Mike 
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