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TR6 '73 TR6, Wiring Question. Original Owner

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J

jdelayknee

Freshman Member
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Hi Forum friends
I am replacing the wood dash, and middle plinth (love that word! it's the so-called crash device under the dash with holes to mount choke, heater switch etc) on my 73 TR6. (I am original owner) When disassembling I wrapped wires associated with various components to assist in re-assembly.
I am in the process of assembly now. I have wiring diagram from Bently and the colorized one from Auto wire. Both of these diagrams show a sold green wire for power in. Mine is purple/orange! I don't see this color on the wiring diagrams for anything.
I have done very little wiring over the years and never had work done by others that would have need for wiring changes.
I bought the car brand new and it had factory installed air conditioning. That did not work well in southern Florida at the time so I ripped it out. It was DIY 40+ years ago so my memory is suspect but I recall just disconnecting the wires from under dash and capping them. I never had need to touch the heater switch.
My original owners manual show the AC in place so that is why I say it was factory installed instead of dealer but I am not certain on that point.
2 questions:
1. Does anyone know of a wiring diagram for 73 TR6 with AC?
2. I will probably need to do some tracing now and I have heard it is best to disconnect battery and use a battery charger for power source (set at trickle charge amp setting) Anyone with details or better advice? I don't want to risk any dead shorts using the battery. I figure on hooking up the power source and checking for 12 volts on the purple/green wire.

Thanks for any help you can offer.
Jerry
 
Jerry- I am not much help other than I've been toiling with a similar task in my 1970 TR6. I think purple with orange tracer has to do with the seat belt warning/ ignition warning system.
 
Jerry,
There is a wiring diagram out there that does show that wire. Last summer I rewired a 74 TR6. I remember that wire but gave the book to the new owner.
Yes, the standard fused hot wire should be a green wire.
If nobody else comes up with the answer, I can try to contact the guy that bought the car.
Charley
 
Jerry,

The Advanced Wiring drawing shows Purple/Orange for the driver door to key buzzer & one end of the seat belt light diode.

Jeff
 
One idea to prevent all the Lucas smoke from getting out is to put a 5 amp fuse in line with the battery while you install and test each circuit. That way if you happen to have a short to ground, the fuse blows rather than major heat and damage to the harness.
Cheers,
Good Luck
Scott in CA
 
Sorry for not responding to your inputs. FYI my new dash is in place and I was able to successfully trace all the wiring issues/questions I had. I went ahead and used my battery charger set to 2 amp "trickle" setting to trace and verify voltage. It was recommended to disconnect alternator which I did. I accidentally grounded a wire here and there & got a tiny spark (nothing like the huge jolt you get off the battery). My original post was incomplete. The Purple/orange wire was related to the heater switch. Mine was not green as called for on the wiring diagram I did verify voltage associated with ignition being in run position so I just reassmeled that way and the heater blower works ok. After I rfeassembled everything and re-installed seats I thought I could have traced that line better but no way and I taking it apart again. It works, no smoke or blown fuses so I'm cool
Thanks again for your thoughtful comments. IMG_5375.jpg
 
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