Thread: fuel sender & guage

youve got the wires on the gauge backwards OR youve got a flipped sender, pull the sender and put the float arm on the other way.

tried the wire swap on the guages. i'll pull the sender out tomorrow and check. Looking at it when i repaired the tank the sender looks as if it can only go in one way but I'll re-check I did the install and repair after an arvo shift could be the sleep monsters got me
thanks Dave

Originally Posted by Blknight.aus

youve got the wires on the gauge backwards OR youve got a flipped sender, pull the sender and put the float arm on the other way.

What he said........No such thing as a positive earth guage, only incorrectly wire guages...........or incorrectly mounted sender units

Unfortunately Rob, while there is no such thing as a positive earth gauge - the gauge and sender changed when they went from positive to negative earth in 1967. The senders and gauges are not compatible, and the senders work in the opposite sense. So you will get this effect by mixing the gauge and sender types.

There are two types of gauge - the earlier type operates by the repulsion of two coils and shows instantaneous changes in fuel level, and does not use a voltage regulator. The later type uses a thermal type gauge, same as the water temperature gauge, which moves only slowly, and has an external voltage regulator, which in the 2a is on the bulkhead behind the instruments, and on the 3 is on the back of the speedo.

Neither gauge is polarity sensitive, so the reverse reading can only be given by using the wrong sender with it. I'd have to have a look at the sender to see if it is possible to have the float set up to give reverse operation, but I do not think it is possible.

John

with the regulator on the bulkhead. 4 pins, 2 for the fuel, 2 for the temp. I'll post what I find even if it makes me look silly

pull the sender out, the casting on the sender won't let the float rotate the other way, switched the wires again, no result. Double check earth circuit-extra wire from sender to body=same condition. i'll put up with it for now will borrow the sender from my brother-in-law's project. Still thinking toward positive earth sender. Will post result when i have tried the other sender.

Going back to my post of the 18th, you must have sender and gauge that do not match - could be either one is wrong, but if you have the instrument cluster with the temperature gauge, then it is likely that your gauge is the later one (which is correct if you have the cable operated wipers), since it is unusual to change gauges rather than clusters. Most likely the tank and hence sender has been changed for an earlier one.

John

think your right about the sender JD. previous owner was a fisherman and got sick of fitting landy tanks, hence the comodore tank in the tray when i got it.
So if the other sender fixes the problem there will be a pos. earth sender free to good home should anyone require it.