Talk Morgan Forums Morgan Sports Cars Classic Morgans (pre-CX) Fuel Gauge

While I'm redoing the entire interior I decided I should try to get the fuel gauge working. The issue is that it reads "empty" whenever the key is in the "on" position and full when off. The needle does move when you turn the car on so I'm not sure if it's a gauge issue. I did replace the sender about 2 years ago with one from some other LBC that I was told might work, and it didn't before or after I replaced the sender/float. I checked with a multimeter voltage across the two wires in different positions of the float and it didn't really show anything. I assume this is a sender issue but I wanted to ask for other opinions before I buy a new sender and get depressed when it doesn't fix anything haha.

1960 +4

Wouldn't you be looking for resistance not voltage?

Sounds like an earthing issue to me. If it's like mine where the two wires connect to the gauge there is a small insulating ring between the connector and gauge body. Make sure the small "tab" is not touching the back of the gauge.

Mine did something similar (but in reverse) when this happened on mine.

If the temp gauge is ok you can probably rule out the voltage stabiliser (if you have one).

Hi Read T, I have just sorted the fuel gauge on my 57 +4 and believe (but could be wrong) that ours are similar in that the sender works the other way around to the later cars. I replaced the sender in my tank with one from an early Morris Minor, circa 57. The later senders for the Morris 1000 also work the wrong way for the early gauge, the correct gauge from a Morris for example is for ones with the gold speedo. These sometimes come up on uk Ebay - guess availability of morris parts would be a bit thin on the ground where you are but could give you a start point. Let me know if you want a photo, rgds, Bill

Thanks for the reply guys, I am sorry I did measure the resistance and voltage but yeah if I was thinking I would have measured resistance. I put a call into Morgan Motors of New England and spoke with a gentleman there in the service department. The sender should have between 5-90 ohms resistance depending on the float position. Mine wasn't changing. I ordered a replacement 'electric' sender which he said works better.

Hopefully it's not made by lucas, otherwise I'm sure some electric sparks are sure to head into the tank haha.