Q1 Incorrect,
Positive is sitting through the starter solenoid at ALL times, You provide an earth which is REALLY the Positive (return path) via either the starter button (to start) or a feed for the horn.
When you depress the horn, power is fed from the battery through the coil, and then to the horn. When depressing the starter button, then an 'earth' (return path) is provided.
You are thinking
positive seeking. Think negative seeking and it is very easy... IF you read the circuit diagram you might note it is a Positive Earth vehicle ... Not negative earth...As used in modern vehicles.. (except them British things.
...Morris Jags etc etc)
Change the Positive Symbol on the circuit (on the battery) to a
negative and the circuit will make sense. Reference. R2 Ford Manual (CMP Vehicles).
Q2. No . You
should use a 12V solenoid/relay. Buy a 1960's model one..Ford F100/ F250/ F350 type one. and you will be OK.. the trouble is with a 6V one, you are at 200% capacity on current. E=IxR.... They are not expensive... and you will not have a fire or worse still the white smoke escapes from the wire and the truck no longer goes...
Ian
Bring it over & I will wire it for you!
