wheelman Posted April 1, 2005 Share Posted April 1, 2005 I tried to search for this but really have no idea what to look for so here goes. I'm in the last stages of integrating the LT1 harness into my 73 240 and ran across a plug I can't identify. It's just inside the engine bay on the right hand side, has 4 female connectors with the following colored wires: 2 black/white (appear to be switched power), black/yellow, green/black. The black/yellow goes around the front to the driver's side all others go into the passenger compartment. Anyone know what these connections are? I also found a black (ground) wire that follows the black/yellow wire to the passenger side and Ys into 2 connectors. The other end goes inot the big white plug in the passenger foot well that is connects to the dash harness. I tried to trace this one out but found no connections to it. Anyone have an idea what this one is for? Once I get these nailed down the wiring will pretty much be at a state where I can try to fire up the car so I'm a bit anxious to figure them out. Wheelman Quote Link to comment Share on other sites More sharing options...
Tim240z Posted April 1, 2005 Share Posted April 1, 2005 If you can take a pic, I will look in my FSM. Tim Quote Link to comment Share on other sites More sharing options...
wheelman Posted April 2, 2005 Author Share Posted April 2, 2005 Tim, Here are the pictures. 4 pin plug picture #1 Here is another view of the plug. Here is the large white plug that the ground wire I mentioned connects to. Here is that wire. It's just hanging out of the front of the car here but I know it goes to driver's side of the engine bay but I don't know what it used to connect to. It's the one that Ys. The one from my car is very beat up and is missing several inches of insulation which obviously didn't cause a problem as it's a ground wire anyway. When I bought the car it was in a partial state of engine removal so some of the wiring harness had already been disconnected. I labeled what I could and pulled the whole thing from the car, now I'm dealing with trying identify those circuits I didn't before. Lesson learned: spend the time to identify all wiring BEFORE removing it. Thanks for being willing to even look some of this up for me, even if you aren't able to help me out. Wheelman Quote Link to comment Share on other sites More sharing options...
Guest 305240 Posted April 2, 2005 Share Posted April 2, 2005 Wheelman, I feel for you. The mess you have reminds me of my mess inside the dash of my Jag. I checked my 73 FSM and the only 4 gang plug I can see in the engine bay with the colors you mentioned is listed as body wiring. Anyway, it says #18, Throttle Pener Relay - M/T model only. I hope this helps. Check your pm's. Quote Link to comment Share on other sites More sharing options...
Tim240z Posted April 2, 2005 Share Posted April 2, 2005 Sorry, but my 94 FSm has no listing of a plug anything like that. The only thing I can suggest is to trace the wires back and see where they go to. Tim Quote Link to comment Share on other sites More sharing options...
Guest 305240 Posted April 2, 2005 Share Posted April 2, 2005 Sorry, I read it as to the wiring harness of the 240 you needed help with. I can't help with the new one going in Quote Link to comment Share on other sites More sharing options...
wheelman Posted April 2, 2005 Author Share Posted April 2, 2005 Tim, The plug is part of the original 240Z wiring harness not the LT1. Sorry for the confusion. I have identified and/or re-wired all the connectors on the LT1 harness it's the datsun harness I'm having problems with. 305240: I replied to your PM. Thanks the info in the 4 gang plug. It actually looks worse than it really is, most of the Datsun harness is in good shape and identified. Just that one plug and ground wire I can't identify. As a last resort I'll just hook it all back up and see waht doesn't work. Wheelman Quote Link to comment Share on other sites More sharing options...
Guest 305240 Posted April 3, 2005 Share Posted April 3, 2005 Glad I could help. It will be in the mail Monday Quote Link to comment Share on other sites More sharing options...
CruxGNZ Posted April 3, 2005 Share Posted April 3, 2005 The plug is part of the original 240Z wiring harness not the LT1. I also have a '73 and my wiring looks nothing like yours. Your connectors are very different from mine. Just for conversations sake, my Z was built on 5/73, when was yours? !M! Quote Link to comment Share on other sites More sharing options...
wheelman Posted April 3, 2005 Author Share Posted April 3, 2005 !M! Mine was built on 7/73. The wiring has all the tape stripped off and the part that normally passes through the firewall into the passenger foot well has been pulled through into the engine bay. In fact at one point the entire engine bay harness was totally removed, so our harnesses may have been much more similar in the past. Some of the connectors that are visible in the pictures are part of the LT1 harness. The connectors you're refering to that are different. Are they the ones in the passenger foot well? If so what do yours look like? Does your harness have the same 4 gang plug just inside the engine bay on the passenger side? If so what is connected to it? What about a ground wire on the driver's side that Ys and connects to 2 different places? Wheelman Quote Link to comment Share on other sites More sharing options...
COZY Z COLE Posted April 3, 2005 Share Posted April 3, 2005 wheelman Was your car originally an automatic tranny??? Some of those wire colors match for the a/t wiring. LARRY Quote Link to comment Share on other sites More sharing options...
wheelman Posted April 3, 2005 Author Share Posted April 3, 2005 Cozy, As far as I can tell it wasn't. I noticed that myself when trying to determine what the connector was for and comparing the wire colors to the Haynes manual. Of course the Haynes manual combines the auto and manual wiring harness and notes that some are auto only. I'm going to finish integrating the other parts of the harness today and worry about that plug later. Wish me luck. Edit: One thing I failed to mention is that when I bought the car it had the dealer installed AC which I have since removed. Maybe this plug is for the compressor clutch on that. The compressor was already gone when I bought the car. BTW: If anyone is interested in buying the parts I have for that AC let me know. Wheelman Quote Link to comment Share on other sites More sharing options...
CruxGNZ Posted April 3, 2005 Share Posted April 3, 2005 Mine was built on 7/73. The wiring has all the tape stripped off and the part that normally passes through the firewall into the passenger foot well has been pulled through into the engine bay. In fact at one point the entire engine bay harness was totally removed' date=' so our harnesses may have been much more similar in the past. Some of the connectors that are visible in the pictures are part of the LT1 harness.[/quote'] Ah, that's why! I thought you had different connectors, but they are from a different harness. The connectors you're refering to that are different. Are they the ones in the passenger foot well? If so what do yours look like? The ones from your passenger footwell look similar to mine. Does your harness have the same 4 gang plug just inside the engine bay on the passenger side? If so what is connected to it? I checked my engine compartment and I still have a 4 wire plug. Here's a picture of it click here It is a relay for the ignition... I think. It clicks when you turn the ignition key to "start". What about a ground wire on the driver's side that Ys and connects to 2 different places? I can't help you out here. I took out half a paper bag full of wiring I didn't need last year and my memory is horrible. Sorry. !M! Quote Link to comment Share on other sites More sharing options...
wheelman Posted April 4, 2005 Author Share Posted April 4, 2005 !M! That was it. The picture of the relay you linked to! I pulled that relay from my firewall about 1 1/2 years ago when I cut out all the rust around my battery box and threw it in the car for "safe" keeping. I'm still not 100% sure what the circuit is but it is hooked back up, at least the relay is. After I receive the FSM from 305240 I'll figure out what the black/yellow wire is and get it hooked back up if I need it. Unfortunately these wiring issues have delayed me just enough that I'll have to wait until I get back from a business trip to Finland to try and fire her up. I have the engine back in and almost all the wiring connected now so I'm getting close. :) :) I'm going to test the fuel system this week by hooking a battery directly to the pump. I really hope there are no leaks as I might have to pull the engine/tranny back out depending on where they are. Thanks again Matt, that picture really helped answer my question. Wheelman Quote Link to comment Share on other sites More sharing options...
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