coil wires

[gwyndav310]

on the new coil i bought there is a plus and minus sign instead of the letters. what colour wires go where any help much welcome thanks

[simmitc]

Depends on whether your car is +ve or -ve earth! The white wire is the feed from the battery, the black and white wire comes from the points, and is thus the earth.

[bmcecosse]

Why did you buy a new coil??????

[gwyndav310]

because i was told it was one of the reasons my points were melting

[bmcecosse]

Oh dear........

[kennatt]

sure they didn't say condenser

[gwyndav310]

sure they didn't say condenser

condenser or coil renewed coil still a problem

[bmcecosse]

It's 'never' the coil.......... We can't tell you how to connect the wires since you still haven't told us if the car is -ve or +ve earth........

[MarkyB]

I bet that if you connect the coil feed wire to the points they'll melt!

[bmcecosse]

Indeed they will - and somehow that's the coil's fault???????????????????????????????????

[gwyndav310]

It's 'never' the coil.......... We can't tell you how to connect the wires since you still haven't told us if the car is -ve or +ve earth........

the car is a negative earth the minus sign on the battery is on the earth of the car

[gwyndav310]

I bet that if you connect the coil feed wire to the points they'll melt!

are you saying ive got the wires on wrong the white lead is to the + on the coil

[bmcecosse]

That should be correct - white to +ve on coil, and white/black on -ve on coil and on the terminal on the dizzy. But was it always arranged so?

[gwyndav310]

That should be correct - white to +ve on coil, and white/black on -ve on coil and on the terminal on the dizzy. But was it always arranged so?

there were no coil wires .i had to rewire the car

[gwyndav310]

That should be correct - white to +ve on coil, and white/black on -ve on coil and on the terminal on the dizzy. But was it always arranged so?

there were no coil wires .i had to rewire the car

should i use a tester on the two wires to check which is live

[MarkyB]

are you saying I've got the wires on wrong the white lead is to the + on the coil

I'm saying that if you connect a 12 volt wire to the points they will melt.
12 volts goes to one side of the coil, and the wire from the other side of the coil goes to the points.

[gwyndav310]

are you saying I've got the wires on wrong the white lead is to the + on the coil

I'm saying that if you connect a 12 volt wire to the points they will melt.
12 volts goes to one side of the coil, and the wire from the other side of the coil goes to the points.

ill check the wires and see which one is live

[bmcecosse]

The white wire is 'live'......the white/black wire is the connection from coil to dizzy - where it is earthed by the points when they are closed. But the impedance of the coil (~ 3.2 ohms) normally limits the current flow. When the points are open, 12 volts will be shown at both connections on the coil...........

[gwyndav310]

The white wire is 'live'......the white/black wire is the connection from coil to dizzy - where it is earthed by the points when they are closed. But the impedance of the coil (~ 3.2 ohms) normally limits the current flow. When the points are open, 12 volts will be shown at both connections on the coil...........

so could it be a faulty coil giving to much voltage

[bmcecosse]

It 'could' be - have you measured the impedance ? It may be a coil intended for a ballast ignition system ?