1985 Ignition Unit (Control Module) Wiring

[Turkeyboy111]

In the 1985 GL1200 wiring diagram, there are two black and blue wires that go from the ignition control module to red and white (4th) and green and orange (overdrive) wires from the shift sensor. As there is no telling which wire goes to what, does it matter how they are connected? I imagine the Honda engineers would have made the wires different colors if the connection mattered, yet at the same time, I can't imagine how it wouldn't matter. Could someone shed some light on the subject?

[AZgl1800]

Looking at the Schematic, and I have been reading such things since 1958.....
I would have to say that it does not matter.

I don't have a schematic of that switch, but I am assuming that all the two Black/Blue wires are looking for is a Contact that is either
1) open
2) closed

so the order of the wires is meaningless.

[Turkeyboy111]

Awesome! Brings me that much closer to finishing wiring!

[AZgl1800]

I found a schematic of the 1985, and those two wires, red and white (4th) and green and orange (overdrive),
appear to go to the LCD panel? and also to somewhere else that I can't determine on my Laptop Screen.

Probably the shift position sensor?
In any event, as they are both the same color, I can't think it will make any difference which way you connect them.


Look at page 19-6

I uploaded that one page to my server:
https://spaces.hightail.com/space/EGMUI ... 2019-6.pdf

[ct1500]

I would guess it has to do with the amount of ignition timing advance for the particular gear. I would use the outermost black/blue on wiring connector of ignition control module for my 4th gear signal.

[Shadowjack]

It doesn't matter because you get vacuum advance in both 4th and 5th gears. On an Interstate, the neutral switch has no wires for the lower gears, but an Aspencade, with its full gear indicator on the dash, has a wire for every gear.

[ct1500]

It doesn't matter because you get vacuum advance in both 4th and 5th gears. On an Interstate, the neutral switch has no wires for the lower gears, but an Aspencade, with its full gear indicator on the dash, has a wire for every gear.

For what purpose does the ignition module need to know when it is in 4th and 5th?

[Shadowjack]

The vacuum advance mechanism is designed to be electrically enabled in those two gears.

[ct1500]

OK I get it. There is a switch controlled by the module in the vacuum line going to the advance.

[Shadowjack]

Yes. The vacuum line goes to the module and a port is opened inside when it gets a ground from the gear position switch.