[DeTomaso] Water temp gauge change with headlights

[MikeLDrew at aol.com]

Hi guys,

This problem has bugged me for years; yesterday I made a video showing what 
my water temp (and to a lesser degree, oil pressure) gauge does when the 
headlight circuit is activated.

http://www.youtube.com/watch?v=UQcKtI20T8g

Reportedly the issue is a grounding problem with the illumination circuit.  
 I intend to get after that in the next few days....

Mike