70 ignition sw ?

[lutronjim]

What exactly does the switch cut off when in the crank position? Trying to document wiring that was changed with my LS install.

The LS pink wire that wants ignition switch on is plugged into the switch on portion of my fuse block.

I think originally the crank position sent 12v to solenoid and a wire from there went to coil to provide full 12v for cranking. The switch also provided less than 12v directly to coil when on and not cranking via resistance wire. I would assume the resistance wire was still 'hot' when cranking.

Don't understand why it wasn't hooked up to the regular circuit going to coil sans the resistance wire.

Does anyone have a pin out picture of the switch showing what each terminal was used for.

Thanks

[VetteVet]

Originally Posted by lutronjim

What exactly does the switch cut off when in the crank position? Trying to document wiring that was changed with my LS install.

The LS pink wire that wants ignition switch on is plugged into the switch on portion of my fuse block.

I think originally the crank position sent 12v to solenoid and a wire from there went to coil to provide full 12v for cranking. The switch also provided less than 12v directly to coil when on and not cranking via resistance wire. I would assume the resistance wire was still 'hot' when cranking.

Don't understand why it wasn't hooked up to the regular circuit going to coil sans the resistance wire.

Does anyone have a pin out picture of the switch showing what each terminal was used for.

Thanks

check this out

http://67-72chevytrucks.com/vboard/s...d.php?t=741245

[lutronjim]

Thanks for reply VetteVet. I have the wiring diagrams printed out. I have a problem sorting out wires on both sides of blukhead connector. Colors often change.

The one that shows the switch has all terminal and wires. It would be neat to have a write up to show what each terminal does.

I haven't found anything about what the switch cuts power to when in crank position. If you have a link it would be most helpful.

[ray_mcavoy]

Originally Posted by lutronjim

The one that shows the switch has all terminal and wires. It would be neat to have a write up to show what each terminal does.

I haven't found anything about what the switch cuts power to when in crank position. If you have a link it would be most helpful.

In the OFF position there is no connection between any of the terminals.

In the ON / RUN position, the BAT (red wire), IGN (pink wire), and ACC (brown, brown w/white stripe wire) are all connected together. There is no connection to the SOL (purple wire) or the GRD 1 & GRD 2 (green & tan wire) terminals in this position.

In the CRANK / START position, the BAT (red wire), IGN (pink wire), and SOL (purple wire) terminals are all connected together. There is no connection to the ACC (brown, brown w/white stripe wire) terminal. The GRD 1 & GRD 2 terminals are connected to ground via the switch's metal case. That serves to provide a "bulb check" feature for the TEMP & BRAKE warning lights on the dash.

[lutronjim]

I assume then that the ignition section of the fuse block is 'hot' in both the run and crank positions.

I posted this earlier but have no idea where it went.

Thanks