another temp gauge/fuel gauge/voltage regulator thread
Just a simple temporary work around to take the temp gauge out of the equation.
Remove the plug from the sending unit on the intake manifold.
Clamp your test light ground clamp to + positive battery, them touch the pointed end of the test light to the temp sending unit.
The test light should glow orange on a cold engine, as the engine warms up it gets brighter and brighter.
Can do the same temporary setup with a (side marker light) 194 bulb and socket wired in the same. Gets brighter as engine gets hotter.
Then you can concentrate on the other 2 electrical issues.
I bet it is back feeding through your gauges as it is trying to find another path to ground.
Same thing happens on turn signals that light dim and won't flash, bad ground wires at the sockets back feeding the system making all kinds of strange things happen.
Can use a secondary jump wire for a good ground at the affected gauges to see that it is a ground problem, then go back and clean up or replace ground terminals.
Hint: If any of the connections are hot to the touch after being on for a while, that tells you there is a bad connection there.
☆☆☆☆☆
Just a simple temporary work around to take the temp gauge out of the equation.
Remove the plug from the sending unit on the intake manifold.
Clamp your test light ground clamp to + positive battery, them touch the pointed end of the test light to the temp sending unit.
The test light should glow orange on a cold engine, as the engine warms up it gets brighter and brighter.
Can do the same temporary setup with a (side marker light) 194 bulb and socket wired in the same. Gets brighter as engine gets hotter.
Then you can concentrate on the other 2 electrical issues.
I bet it is back feeding through your gauges as it is trying to find another path to ground.
Same thing happens on turn signals that light dim and won't flash, bad ground wires at the sockets back feeding the system making all kinds of strange things happen.
Can use a secondary jump wire for a good ground at the affected gauges to see that it is a ground problem, then go back and clean up or replace ground terminals.
Hint: If any of the connections are hot to the touch after being on for a while, that tells you there is a bad connection there.
☆☆☆☆☆