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Starter Wire Routing 1800 1973

posted by  Chris Mullet on  Sun Aug 14 18:12 CST 2016
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last visit: Fri Oct 24 09:08 CST 2014
[RELATED]

I think I have it worked out.

The one and only (unmolested) harness coming up from the trans consists of:

Yellow = Stalked-switched power to the O/D solenoid (No O/D relay on '73 ES is my understanding)
Brown = Power to both the Neutral switch and Reverse Light switch
.75 mm White = Neutral switch to Seat Belt Buzzer
1.0mm White = Reverse switch to Backup Lights

All four of the above wires run from the trans up to the 4-pin disconnect. That means there was no pin available in the disconnect by which to feed the START signal from #50 on the Starter switch. (In the BW35 configuration there are only there wires running from the trans to the 4-pin disconnect. Thus, a blue wire carries the signal from #50 on the ignition switch, THROUGH the 4th contact in the 4-pin disconnect, then down to the starter solenoid and two white D-Jet wires.)

So my plan is this: The trans-side of the 4-pin connector (Yellow/Brown/.75 White/1.0 White) will remain as-is, no re-pinning. I will re-pin the mothership side of the disconnect to make all four of the wires do what they should, relative to the trans harness. So the disconnect will only carry trans-related stuff.

In order to get the START signal from ignition switch to the starter and the D-jet wires, I have added a single pin disconnect that I cannibalized from the BW35 harness blue wire, and it sits right beside the 4-pin disconnect. So now the blue wire comes from #50 on the ignition switch, through the firewall, as it always did, but now terminates at the top of the new single-pin disconnect. I used the bottom half of the single-pin disconnect to join the blue wire running on to the starter plus the two D-jet wires. It's all sheathed and/or shrink wrapped and looks pretty clean. I still need to run a new yellow wire from the top of the 4-pin disconnect, through the firewall, and to the O/D stalk switch, but I have that under control.

If anyone has been able to follow all this gobblelty-goop, I'm grateful and impressed.

Thanks.





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