2nd Stewart Warner Problem
I have a long term unresolved problem with 3 of my Stewart Warner Deluxe gauges. These are electric gauges not mechanical. My Tach, Fuel Level, and Temperature gauges all jump up a few points when the light switch is moved from off position to the parking light or headlight position.
When the lights are switched on:
The tach will raise 200 Rpm.
The fuel level will raise to show approx. 1 1/2 to 2 gallons of additional fuel.
The temperature gauge will raise another 15 to 20 degrees.
The ammeter is uneffected as are all other gauges which are mechanical.
All gauges are grounded with seperate and individual wires.
The only thing common to all 3 gauges effected and the light switch is the gauge lights that they all carry.
Any ideas are most welcome.
-Geary
I am no expert on the electrical but!!
Just to throw something out there that I have always though about. Our bulkhead, the steel frame that holds the doors and dash is sitting on top of the interior fiberglass. Now everthing is grounded to this steel frame but if the bolts that go through this framework to the frame don't have a good ground what happens. When I built my car I used a heavy star washer on top of the bolt head so the bolt head would have a good groung to the steel bulkhead and the a star washer under the car next to the washer and between the frame so that would complete the ground, so when you torqued those bolts down it would ensure a good ground between the steel bulkhead and the frame.
In therory it's possible for those bolts to be just centered just enough that they never make contact to the frame.
Just something for all the electrical wizzards to digest.