79 temp gauge electrcal problem
Thread Starter
Advanced
Joined: Aug 2009
Posts: 51
Likes: 4
79 temp gauge electrcal problem
On my last trip in the vette the temp gauge start to show over the 260f line. It heppen only when i turn on the lightes (in the same time the light in this gauge stop working)
When i turn off the lightes the temp gauge return to the normal operaiton temp range.
Is it the electricl card of the gauge or only the burned light bulb?
When i turn off the lightes the temp gauge return to the normal operaiton temp range.
Is it the electricl card of the gauge or only the burned light bulb?
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Sounds like a 'grounding' problem....most likely on the electrical circuit board (if you have a later model C3). Possibly a broken foil line going to ground; the gauge (when not lit) might be able to scavenge a ground by another path.
Melting Slicks
Joined: May 2015
Posts: 2,365
Likes: 428
From: Cape Girardeau Missouri
Something tells me you will find a short in the printed circuit behind the gauge pack. It will be between one of the leads to the temp gauge and one of the lighting leads.
Those printed circuits tend to delaminate over time. They're moderately repairable (with patience) but my replacement (mine from Willcox) is superior to the original and reasonably priced.
Those printed circuits tend to delaminate over time. They're moderately repairable (with patience) but my replacement (mine from Willcox) is superior to the original and reasonably priced.
