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Lotus Europa Forums => Garage => Topic started by: kram350kram on Tuesday,May 11, 2021, 09:20:46 AM

Title: 1974 TCS wiring diagram
Post by: kram350kram on Tuesday,May 11, 2021, 09:20:46 AM

Does anyone know a location to view a TCS federal wiring diagram? Can find TC but no TCS? Thanks much.   

Title: Re: 1974 TCS wiring diagram
Post by: BDA on Tuesday,May 11, 2021, 09:27:59 AM

A reminder to you and others: This page is a WEALTH of information. Everybody should bookmark it and study it. http://lotus-europa.com/manuals/

You're welcome!  :)

Now, to your question. There are two different wiring diagrams for the TCS.
Prior to 3924R: http://lotus-europa.com/manuals/misc/electrical/tcsearly.gif
After 3924R: http://lotus-europa.com/manuals/misc/electrical/spclc.gif

Title: Re: 1974 TCS wiring diagram
Post by: LotusJoe on Tuesday,May 11, 2021, 09:28:05 AM

http://www.lotus-europa.com/manuals/misc/electrical/spclc.gif

Title: Re: 1974 TCS wiring diagram
Post by: BDA on Tuesday,May 11, 2021, 09:34:36 AM

I was just about to post that link when you beat me to it, Joe!

Title: Re: 1974 TCS wiring diagram
Post by: kram350kram on Tuesday,May 11, 2021, 10:06:28 AM

Thanks again, should have looked harder!

Title: Re: 1974 TCS wiring diagram
Post by: dakazman on Tuesday,May 11, 2021, 11:47:29 AM

  Here is another tricky place to get to it.  Last item on list.😂😂😂🥱

http://www.lotuseuropa.org/LotusForum/index.php#c1


Dakazman

Title: Re: 1974 TCS wiring diagram
Post by: kram350kram on Wednesday,May 12, 2021, 03:06:25 PM

Got the wiring diagram, but not sure how the dome light is supposed to operate. Is the switch on the dome light only to turn it off when the doors are open?

Title: Re: 1974 TCS wiring diagram
Post by: SilverBeast on Wednesday,May 12, 2021, 03:30:30 PM

Light always comes on with door open. Switch is to turn it on with the doors closed (so passenger can read maps, or you can see what you are doing when you are parked)

Title: Re: 1974 TCS wiring diagram
Post by: Pfreen on Wednesday,May 12, 2021, 03:31:01 PM

On my car, the switch turns it on manually.  There is no way to manually turn it off, bypassing the door switches.  I have the connectors pulled out of the door switches because I don't typically drive at night and I don't want to run the battery flat by leaving the doors open.

Title: Re: 1974 TCS wiring diagram
Post by: BDA on Wednesday,May 12, 2021, 03:35:10 PM

With the switch to the left (looking toward the front of the car), the light only turns on when a door is opened. With the switch to the right, the light is on whether the doors are opened or not.

Title: Re: 1974 TCS wiring diagram
Post by: kram350kram on Wednesday,May 12, 2021, 05:45:27 PM

BDA, just can't seem get the wiring to work in that fashion based on the wiring diagram? Any works of wisdom?

Title: Re: 1974 TCS wiring diagram
Post by: BDA on Wednesday,May 12, 2021, 06:02:24 PM

Don’t discount the possibility that mine is incorrect!  ;)

What does yours do?

Are you dealing with the original wires?

Title: Re: 1974 TCS wiring diagram
Post by: kram350kram on Wednesday,May 12, 2021, 06:18:17 PM

BDA, Original switch with purple/black, purple and a ground. With current input to either wire the light will not operate as you stated? Something must be amiss. Any ideas? 

Title: Re: 1974 TCS wiring diagram
Post by: BDA on Wednesday,May 12, 2021, 06:27:46 PM

Check your door switches, your fuse for your purple wires, connections, and your grounds, of course. I’ll try look at how my light is wired. I had a problem with the bullet connectors so I replaced them with spade connectors.

Title: Re: 1974 TCS wiring diagram
Post by: kram350kram on Wednesday,May 12, 2021, 07:01:16 PM

Think I got it! Misinterpreted the line routing thru the switch and the wiring diagram. Thanks for the help. 

Title: Re: 1974 TCS wiring diagram
Post by: BDA on Wednesday,May 12, 2021, 07:03:05 PM

Glad you got it fixed!