How does the fuel and temp gauges work?
The temp gauge is a capillary one so that isn’t in the equation. The electrical gauges run on 10 volts DC current. Without a VS, the gauges would change their readings every time the engine speed or load changed. RAY But it doesn’t Ray, because the gauge mechanism is damped.
What does it mean when your fuel gauge stops working?
If the fan also stops working that indicates voltage has been lost from the stabiliser, so it is a wiring/connector (of which there are several) problem back towards the fusebox. If the fan still works then it could be the stabiliser, or the wiring/connections to the fuel gauge, which is nearest in the run, being teed from there to the temp gauge.
What’s the voltage on a damped fuel gauge?
A damped gauge will still fluctuate with voltage, which could be anywhere from 12v to 15v as Ray says varying with engine speed and load. That’s why a stabilised system was necessary, the manufacturers didn’t put it in for fun. Alternator or dynamo makes no difference, but the type of gauge and sender does.
How are fuel and temp gauges on a 1977 MGB?
The last two time I took my 1977 US spec. MGB out for a drive the fuel and temp gauges would work then not work then work then not work. In other words gas tank is full but the needle will sometimes drop down to about 1/4 tank and at the same time the temp gauge drops down to close to the cold location.
Why is the tachometer on my car not working?
Tachometers have a “sense” signal on the the “S” terminal that originates from the the charging system. If the battery is not being charged (look at the voltmeter) then that would account for the tachometer not working either. Fuel senders are typically 33 – 240 ohm resistive devices. You need a multitester to verify operation of any sender.
Why are the RPM and gas gauges not working?
Just purchase 1997 Bayliner Trophy 115hp Outboard Yamaha…. The gas, rpm and speedometer dont work, I like at the wiring behind the gauges… seem like all the wires is connected except one is not connected for each gauges… Does anybody have any idea or know of a diagram, book, or video of some sort?? any reply is greatly appreciated….
What kind of fuel gauge do I Need?
Fuel senders are typically 33 – 240 ohm resistive devices. You need a multitester to verify operation of any sender. If you use the search feature in this forum you will find a multitude of Fuel Gauge troubleshooting posts, most with diagrams and testing procedures. Other gauges work on the same principle.
Why is the speedometer not working on my car?
Pictures aren’t really necessary since every gauge except the speedometer needs +12 volts on the “I” terminal when the key is on, ground on the ground terminal, the a signal from the sender (fuel, temperature, trim or whatever) on the “S” terminal.