T

TomSy

New Member

• Jun 21, 2024

• #1

Having problems getting a spark. LT contact on coil is live but that is the only attached contact other than the HT lead. This is a picture from a Series 111 manual, what are the other 2 connectors in this picture doing and do I need them?

 

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tottot

Well-Known Member

• Jun 21, 2024

• #2

Power to positive on coil, negative connection goes to distributor. Without that nothing happens.
What's going on in your pic don't know, not enough info.

 

Last edited: Jun 21, 2024

kermit_rr

Very

Full Member

• Jun 21, 2024

• #3

If that's a stock photo from a book then it could be a power feed to thel heater on a solex carburettor. It gets activated when you pull the choke on

 

T

TomSy

New Member

• Jun 26, 2024

• #4

tottot said:

Power to positive on coil, negative connection goes to distributor. Without that nothing happens.
What's going on in your pic don't know, not enough info.

Click to expand...

First picture was from a Series 3 manual, with 3 wires connected to the coil. This picture is my car with just one positive low tension connection and the other connectors vacant. Does it earth through the holding clamp or should it have a wire connection to negative on distributor?

 

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tottot

Well-Known Member

• Jun 26, 2024

• #5

No earth. Read my post above again.

 

kermit_rr

Very

Full Member

• Jun 27, 2024

• #6

If the coil was permanently earthed, ie through the body then it would never make a spark
Grounding the body can help reduce electrical noise from the coil and helps to sink heat away from the coil, maintaining efficiency

 

Last edited: Jun 27, 2024

Dorset_dumpling

Well-Known Member

• Jun 27, 2024

• #7

You should have two terminals on your coil. One will be marked + or sw and the other will be marked - or cb, Connect the + terminal to the wire from the ignition switch and connect the - terminal to the small lead on your distributor. If you have an electronic distributor you will have two leads, one red one and one black one. Connect the red lead to the + terminal on the coil with the ignition lead and the black one to the - terminal on the coil.

 

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TomSy

New Member

• Jul 11, 2024

• #8

Dorset_dumpling said:

You should have two terminals on your coil. One will be marked + or sw and the other will be marked - or cb, Connect the + terminal to the wire from the ignition switch and connect the - terminal to the small lead on your distributor. If you have an electronic distributor you will have two leads, one red one and one black one. Connect the red lead to the + terminal on the coil with the ignition lead and the black one to the - terminal on the coil.

Click to expand...

Thanks to all, being novice I confused HT with LT on wiring diagram. Now found the connector to distributor and problem solved, running sweetly

 

T

TomSy

New Member

• Jul 11, 2024

• #9

Thanks to all, being novice I confused HT with LT on wiring diagram. Now found the connector to distributor and problem solved, running sweetly