[mgarblik]

I am trying to find out for sure which wire is + and - on the pick-up coil? There is one solid white and one white with a green tracer. I need to know this because I am using this old TI pulse distributor to trigger an MSD . To be wired and run correctly, I need to know this info. None of the Delco info I have or any of the wiring diagrams clearly point this out. Thank you in advance.

[Terry M. Hunt]

Do a search for Dave Fiedler, who has been doing ti repair/restoration for last 40 years.

[Geoff]

Peter Serio who posts here will probably know. Very knowlegeable on the elec stuff!

[johnta1]

You're referring to the pick-up in the distributor, correct?
(why not use a HEI one?)


I think the white is + and the white with green tracer is - (negative)

[mgarblik]

Thanks for the replies so far. Dave Fiedler I haven't spoken to since I did this same thing in the mid 1980's. A blast from the past! I will look him up. Hope he is well. Peter Serio restored the speedometer on the 62 Catalina in question. It is perfect. Probably more accurate than a GPS now! As far as using an HEI pick-up: It is the same idea but won't fit easily in the old points distributor. Physically quite a bit different in size. I can't use an actual HEI distributor because this engine is a 2x4 induction set-up and it wouldn't fit. I could trigger off the points but the plan is for this engine to run 7000-7200 RPM with a solid lifter cam, and point bounce becomes an issue. The best of both worlds would be to trigger the hidden MSD off this points style distributor with the magnetic pick-up inside. I have three of these pick-up coils if I just knew what the polarity was? If I were to guess, I would agree with you. In home wiring, green is ground, so my guess is the white/green tracer is -. Just trying to confirm. Thanks

[johnta1]

Here is a schematic of 67 TI wiring:





Sounds like you need just the polarity of the #1 and #2 ?


Here is a MSD diagram, which uses the HEI which this TI is basically the same idea.









And the wiring colors for different brands:







As said, green is usually ground, and I have a pic of the 67 TI having the connector from the TI control unit to distributor as being White connecting to white and Green connecting to White/green tracer (which is on the pick-up in dist).


So, up to you I guess.

[mgarblik]

Originally Posted by johnta1

Here is a schematic of 67 TI wiring:





Sounds like you need just the polarity of the #1 and #2 ?


Here is a MSD diagram, which uses the HEI which this TI is basically the same idea.









And the wiring colors for different brands:







As said, green is usually ground, and I have a pic of the 67 TI having the connector from the TI control unit to distributor as being White connecting to white and Green connecting to White/green tracer (which is on the pick-up in dist).


So, up to you I guess.

Thanks for that information and the diagram. The truth is there really isn't a positive and negative. It's just a coil of fine wire with two leads coming off it. It's a tiny generator that has magnetic induction produce a small AC output. But both MSD and even Delco make a big deal out of making sure the polarity is correct but don't specifically give the wires a polarity. Delco shows the connector and wire colors and says make sure you plug it together correctly. End of story. MSD says make sure the polarity is correct but only calls out the newer HEI coil which is white and solid green. White seems to be consistently called positive by MSD so I will try it that way. Thanks for the help everyone.