Ignition / Headlight switch wiring diagram

[SafeAirOne]

TAW has it here. http://www.expeditionlandrover.info/ignSW.htm
Jim Wolf

Interesting...The contact numbers on the wiring diagram bear no resemblance to the contact markings on the back of the switch on pre-SIII vehicles?

[pgeorgeson]

Thanks.

[lrdukdog]

Interesting...The contact numbers on the wiring diagram bear no resemblance to the contact markings on the back of the switch on pre-SIII vehicles?

Ok but, you knew there would be a "but" didn't you? I would have to take mine off to see (1966 SIIA) are the contacts etc. in the corrct places if so then I would say try it out and see. It is probably like most things Land-Rover ie, there is nothing standard from one to the other as far as parts go. I guess some switches had the letters and some didn't.
Jim Wolf

[Billy5]

If your switch is like my 2a then maybe I can help. There one post on the back by itself, this is the feed to the switch. The rest are "tied" meaning power is shared to two posts. So brown/blue brown on one, white with purple ( starter solenoid) etc. Use a test light once you have power to the switch turn it on. There will be one post that doesnt not have power until you turn the switch to start then off when you release it. This should be the starter solenoid post. The rest is lights.

[TeriAnn]

Interesting...The contact numbers on the wiring diagram bear no resemblance to the contact markings on the back of the switch on pre-SIII vehicles?

The connection diagram on my switch back drawing is for trucks that were positive earth from the factory and had a combination ignition headlamp switch. The diagram will not work for late SIIA or SIII.

There were no numbers on the combination ign./headlamp switch.

[SafeAirOne]

There were no numbers on the combination ign./headlamp switch.

Ahh...so the labels on your diagram are just there to assist folks in figuring out what to plug into each terminal...Gotcha.

IIRC, the first SIII ignition switch I replaced had the terminals numbered exactly the same as the wiring schematic, but the one I replaced a few months ago had them labeled completely differently. No bearing on the OP, but I figured they might be labeled the same as on the schematic for those "old" Rovers.

[pgeorgeson]

The connection diagram on my switch back drawing is for trucks that were positive earth from the factory and had a combination ignition headlamp switch. The diagram will not work for late SIIA or SIII.

There were no numbers on the combination ign./headlamp switch.

Mine is a combination headlight/ignition switch. Billy5's post is helpful to track it down, but I was hoping to find a diagram of that type of switch that shows everything (I need it a simple as possible based on my complete incompetence).

[pgeorgeson]

I am following up on this. I still haven't found a wiring diagram that has the same configuration/markings of my switch, which for clarification is a combination headlight/ignition switch on a negative earth 1966 IIa. (The diagrams for the positive earth IIa's that I can find show two different switches for the ignition and headlights, with the posts identified by number: The diagram for the positive earth IIa has some of the same letters that my switch has, but they are not all the same).

My switch has an outer ring and an inner ring. The inner ring has two posts tied together, and is marked "ign." I think I can figure that one out.

The outer ring has the follwing posts on it (they are a little hard to read, but I think these are the markings):
"A"
"S&T"
"PRS3"
"H"

As if you were talking to a 3rd-grader, please tell me what those posts are and where the wires go that are coming to and from those posts. (please understand that I realize these are dumb questions, but if I could figure it out without your help, I wouldn't be asking them).

Thanks for your help.

[pgeorgeson]

Any help here?

[LaneRover]

S&T means Side and tail lights
H is headlights
not sure about the PRS3, is that on the outer ring or next to wear the key goes in?
Also not sure about A.

I can't help you much with the wiring other than the fact that the headlight current goes from the battery to the switch and all the way to the lights, same with the side and tail lights.

Sorry I am not more help