Carbon pot electrical connections
Discussion
I don't know anything about TVR's.
If you really do have only two wires and you are trying to connect them to a potentiometer, with only two connections, it doesn't matter which way around they go.
A potentiometer can either be used as a divider or a variable resistor. There would normally be three connections.
The center connection cannot be interchanged with the end ones.
If the potentiometer is logarithmic, then you can't interchange the end connections.
If the pot is beng used as a variable resistor (rather than a divider) then you only need two connections, which would be a middle connection and one of the ends.
If you really do have only two wires and you are trying to connect them to a potentiometer, with only two connections, it doesn't matter which way around they go.
A potentiometer can either be used as a divider or a variable resistor. There would normally be three connections.
The center connection cannot be interchanged with the end ones.
If the potentiometer is logarithmic, then you can't interchange the end connections.
If the pot is beng used as a variable resistor (rather than a divider) then you only need two connections, which would be a middle connection and one of the ends.
GreenV8S said:
It's a solenoid, so it might well work either way round but on the other hand it might have some electronics inside; connecting it the wrong way round *might* blow it up.
I guess the "carbon pot" is someting else!
If it's a solenoid, it'll likely have a diode to protect the transistor that is driving the solenoid (if it is a transistor).
This may or may not be located with the solenoid. If the diode is with the solenoid, or there are other electronics with the solenoid (as V8S suggests), there is a good chance that something will go bang.
If I've understood it correctly, we're talking about the purge valve for the carbon cannister. The purge valve connects the carbon cannister to the engine plenum under the control of the ECU. It's a little doohicky about three inches long and two inches in diameter, with a 10mm hose in and out, and an electrical connector to operate it. Internally it uses a solenoid to open and close the valve.
I've got one in the garage, but I guess you can get at yours just as well. Unfortunately the rest of the car is a hundred miles away so I can't tell you what the wiring is like. But if you know what colour wires you've got I could see if they feature on the wiring diagram?
I've got one in the garage, but I guess you can get at yours just as well. Unfortunately the rest of the car is a hundred miles away so I can't tell you what the wiring is like. But if you know what colour wires you've got I could see if they feature on the wiring diagram?
I think hes talking about the later one that clips directly on to the cannister. I've got both variants, if you let me know which one you want the connections for I'll have a gander. The connectors are the fiddly junior timer type - not common spades AFAIK. If you have one with spade connectors, its probably off another car (purge valve is just a simple device & available on 50% cars in the scrapyard - if you can find it...)
Dave
Dave
Many thanks for the replys.
Its the purge valve on the top of the carbon canister. The purge valve has two electrical spade connectors. The valve itself is in a plastic moulding and clips onto the top of the cannister. Just wondering if there is a + or - terminal.
The carbon cannister is used on the cat cars. The valve just seems to be a vent from the tank/plenum.
Many thanks
Alex
Its the purge valve on the top of the carbon canister. The purge valve has two electrical spade connectors. The valve itself is in a plastic moulding and clips onto the top of the cannister. Just wondering if there is a + or - terminal.
The carbon cannister is used on the cat cars. The valve just seems to be a vent from the tank/plenum.
Many thanks
Alex
Gassing Station | Chimaera | Top of Page | What's New | My Stuff