ST1100 Gauge Issues

[R1stu]

OK, guys. Since the rebuild finished last week, I have had a couple of teething issues.


1) the fuel gauge always shows full no matter how much fuel.

2) the temp gauge rises up the dial, but won't decrees. If I remove the sender wire it drops down to zero fine. Connect it back up, and it shows correct temp.

Both were working fine before the rebuild.

Any Ideas?
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Carbon closet tart! https://www.bikepics.com/members/r6stuk/02r6/
Stolen bike. 2000 R1: https://www.bikepics.com/members/r6stuk/00r1/
Current bike 1991 Honda ST1100 Pan European, 1986 Honda cb350sg (Finished)

[Nobby the Bastard]

Normally, there are 3 wires to the guage.
1) earth
2) 12 v
3) actual reading.
The 12 v one acts as a reference and the needle goes up and down compared to this so check the 12v supply on the one that goes up but not down.

I think you've swapped the 12v and sender reading wires round on the one that reads max all the time.
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050

[R1stu]

I thought similar, however, the wires are to size to fit only the plugs designed too. also, the fuel sender is a block plug, so can only go one way.

Originally the temp gauge would not go up at all. I then found out that it earths to the frame via the housing, As I had powder coated the frame it did not earth.

I have since removed the powder coat, and it is now rising, but that's it!
____________________
Carbon closet tart! https://www.bikepics.com/members/r6stuk/02r6/
Stolen bike. 2000 R1: https://www.bikepics.com/members/r6stuk/00r1/
Current bike 1991 Honda ST1100 Pan European, 1986 Honda cb350sg (Finished)

[martin734]

There are three wires which go the fuel gauge and temp gauge. They should both have a green/black wire and a light brown/dark brown wire. The green/black wire is the earth wire and the light brown/dark brown wire is the 12v wire and should go to fuse A on the main fuse box. The fuel gauge has a grey/black wire that goes to the fuel sender and the temperature gauge has a blue/green wire that goes to the temp sensor.
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Current bike: ST1100 "Big Red"

[Nobby the Bastard]

Have you checked that you have a 12v and another somewhere between 0 and 12v getting to both guages?
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050

[R1stu]

Defoe power to both, as when unplug sender for fuel it drops. Yes it's a blue green on temp sensor. If remove the wire from temp sender and earth it rises. Un earth sensor wire it drops, so gauges in dash themselves are fine.

I think when fuel dropped I will remove and move fuel sender and try manual moving it.
____________________
Carbon closet tart! https://www.bikepics.com/members/r6stuk/02r6/
Stolen bike. 2000 R1: https://www.bikepics.com/members/r6stuk/00r1/
Current bike 1991 Honda ST1100 Pan European, 1986 Honda cb350sg (Finished)

[martin734]

Have you checked the connections on the senders? The temp sensor obviously earths itself and the fuel sender earths via a green/black wire.
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Current bike: ST1100 "Big Red"

[R1stu]

[R1stu]