Andrews Coil Wiring for Pamco Ignition

[hardway1969]

So I got my red Andrews coil mounted on my '77 XS650. However no where on the coil is it labeled which threaded terminal is positive and negative. It is brand new in the box but did not have any instructions. Can someone point me in the right direction?

Also, since there were originally 2 coils on the bike and now there is only 1, what should be done with the two extra wires that are left over that went to the 2nd coil?

Thanks!

[5twins]

On a dual output single coil like this, it doesn't matter how you connect the 2 small terminals, it will work either way. How you connect the "+" and "-" wires to it will determine which direction power flows through it but like I said, it doesn't matter, it will function either way. Some timing lights will work erratically if power is flowing one way as opposed to the other so if yours does, just switch the connections.

The connections for the 2nd coil can just go unused if you like but you can power the Pamco off that 2nd R/W wire. Both R/Ws to the original coils come from the same feed wire in the harness. You need power to the Pamco anyway, might as well use an available wire. I simply attached a male bullet connector to the red Pamco wire and plugged it into that now unused extra R/W. The other extra wire (gray or orange) was from one of your points sets and will not be used anymore. The other original points wire can be used to connect your Pamco green wire to one of the small new coil terminals.



I added bolt-on spade terminals to my coil and made short jumper wires so the harness wires could plug right in .....

[hardway1969]

You are the man 5Twins. Thank you for the info and great picture!

[5twins]

For spark plug wire install, I strip about 1/8" off the insulation and fan the wire strands out in a radial pattern .....



I brush a little dielectric grease on the end of the wire then screw it into the coil or screw the plug cap onto it.