Delco EST Distributor

[wufibugs]

I have a Delco EST distributor that has two plugs. Left plug harness goes to the ignition coil. Right plug/harness has 4 wires. There is a special 3 wire harness for engine timing. On this plug, wires 1 & 2 are jumped together; wire 3 is connected to 12v. The 4th wire goes to the shift interrupter. The regular plug has only the 1 wire that goes to the shift interrupter.
I am not sure if the wire that goes to the shift interrupter is the leftmost or rightmost of the 4 wires. Any help you can provide is appreciated.

Richard

 

[achris]

What engine are you working on? (Year, model and serial number)

Chris....

 

[wufibugs]

1989 Wellcraft 170 w/ Mercruiser [GM] 3.0L Alpha.

 

[achris]

I have a Delco EST distributor that has two plugs. Left plug harness goes to the ignition coil. Right plug/harness has 4 wires. There is a special 3 wire harness for engine timing. On this plug, wires 1 & 2 are jumped together; wire 3 is connected to 12v. The 4th wire goes to the shift interrupter. The regular plug has only the 1 wire that goes to the shift interrupter.
I am not sure if the wire that goes to the shift interrupter is the leftmost or rightmost of the 4 wires. Any help you can provide is appreciated.

Richard

The plugs are 'keyed', you can't get it wrong... But the white/green wire from the right hand plug is on the left of that plug (nearest the other plug)...

Chris.....