No power on I side of ignition solenoid after T5 swap and rebuild.

[ks65stang]

I just rebuilt the 289 on my 65 Coupe and swapped in a T5 from a C4. Engine started w/ the ignition switch prior to the rebuild / swap. Car wouldn't start after install so I hard wired the + side of the coil to the + on the battery and crossed over the ignition switch w/ a pair of pliers to get is started. Completed break in and now I need to resolve the wiring issue.

I figured the 47 year old wiring harness was shot, so I bought a new one and installed it and no start. Solenoid is good, tested, and recently replaced. I have done nothing with the neutral safety switch? My neutral safety wiring has 4 wires and 2 plugs and I have jumped it over every combo and it does nothing. How do these wires need jumped to start?

I reviewed the wiring digram in the below link and it only has 2 wires for the neutral safety switch?

http://www.hammar.dyndns.org/%7Edjha...1965/1965c.jpg

Also FYI, the starter will crank w/ the coil + side disconnected and in the on position of the keyed switch (not the crank position, the on position). I'm hoping this is a neutral safety switch issue?

Suggestions?

Thanks in advance!

[bartl]

Originally Posted by ks65stang

Also FYI, the starter will crank w/ the coil + side disconnected and in the on position of the keyed switch (not the crank position, the on position). I'm hoping this is a neutral safety switch issue?

Suggestions?

Thanks in advance!

That sounds like the wires for the "S" and "I" terminals at the solenoid are REVERSED. IIRC the wire to the "S" terminal is RED with a BLUE tracer and the wire to the "I" terminal is possibly BROWN and may have a tracer, but I can't remember for sure.

[GypsyR]

The other two wires in the switch are for the backup lights.
You should be able to simply jump across the red/blue wire #32 to complete your starting circuit. And as Bart says, make sure this wire terminates at the correct "S" small post on your starter solenoid. The "S" terminal is the one on the same side of the solenoid as the cable that goes to the battery. It shouldn't be too difficult to track down the lack of connection with a cheap test light. Hopefully.
There's a fairly large voltage drop in the system when cranking the engine, particularly in colder weather. The wire from the coil to the "S" terminal post draws current with the starter to provide the coil 12 volts only when cranking. Once the engine is started then the coil gets power from the ignition switch. When cranking the coil gets power from both wires. With a healthy engine and starting system you can forget to connect the coil wire to the "S" terminal and most of the time the engine will start just fine. In other words you can disconnect it while testing if necessary.

[ks65stang]

Originally Posted by bartl

That sounds like the wires for the "S" and "I" terminals at the solenoid are REVERSED. IIRC the wire to the "S" terminal is RED with a BLUE tracer and the wire to the "I" terminal is possibly BROWN and may have a tracer, but I can't remember for sure.

This is correct, they were. I jumped the Neutral Safety Switch and all is well, thank you!