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tincan1966 · 07-16-2014, 08:47 PM

The light and dark green wires that share a plug are for temp sender with dual lights(cool and hot)
With and HEI distributor , there's no need for the yellow wire from the starter "R" post to distributor.
The White wire is actually the original resistor wire to the points type coil +. This should not be used to power your HEI- the low voltage will cause early failure, if it will start at all. This should be replaced with 12 gauge wire from that plug in. (The other side is regular wire to the ignition switch.
Purple to starter "S" post
Blue is the original oil pressure sender wire for warning light dash(without gauge)

07-16-2014, 08:47 PM	#3
tincan1966 Registered User Join Date: Oct 2010 Location: Independence,KS Posts: 1,477	Re: Engine harness HELP needed The light and dark green wires that share a plug are for temp sender with dual lights(cool and hot) With and HEI distributor , there's no need for the yellow wire from the starter "R" post to distributor. The White wire is actually the original resistor wire to the points type coil +. This should not be used to power your HEI- the low voltage will cause early failure, if it will start at all. This should be replaced with 12 gauge wire from that plug in. (The other side is regular wire to the ignition switch. Purple to starter "S" post Blue is the original oil pressure sender wire for warning light dash(without gauge)