Reverse Light Wiring

[Ohmess]

So, when installing a manual transmission in lieu of an auto, I see where the reverse light switch is to be installed into the manual transmission. I am unclear on the wiring, however (and Tmason is running around without a reverse light switch following his conversion).

Carl Nelson's description in our technical section of the changeover is as follows: You should also remove all of the wires for the shift indicator and the lamp assembly. A jumper will have to be made up for the reverse lamps. Two wires from the switch on the transmission to the connector in the passenger compartment at the firewall below and to the left of the steering column. This connector has three wires gray/red, blue/white and violet/black. Use the last two.

So, once I remove the wiring for the auto shift indicator and lamp assembly, and install the back up light switch in the manual tranny, how do I wire up the new switch?

It appears that I am to look for a connector with gray/red, blue/white and violet/black and then need to wire the switch to the blue/white and violet/black wires? Presumably I need to procure the appropriate connector that mates up to the one in the car to do this.

But then, what does the jumper reference mean? Will there be pins on the now unused auto connector for the back up light that need to be jumped in order to allow the manual back up switch to work?

 

[Ohmess]

Right, well in case anyone runs into this same problem, here is the solution:
The connector for the manual brake light connection is wired in series after the automatic wiring. Thus, two of the wires from the nine pin connector on the engine side of the firewall for the automatic wiring go into the manual brake light connector. As Carl says, these wires are blue/white and violet/black.

These two wires need to be connected to the reverse light switch on the manual transmission. They also need to be routed differently because on the automatics the run through the hole for the clutch master.

They fit easily through the holes for the automatic starter relay wiring.

They will be too short once cut from the automatic connector; extending them to the switch is what Carl means when he states that a jumper must be made. You don't need to add a connector in order to do this; as noted there is already a connector under the dash.

 

[nobrakese28]

So. On my car car I eliminated the auto transmission wiring completely, it all "bolted out", meaning no cutting.

I simply plugged in the wire into my reverse light switch and they worked just fine, the 1971 may have slightly different wiring.

-Marco