Odd Electrical issue

djjoshuad

New Member
Aug 8, 2009
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DFW
OK, so this is my first post but I've read a lot here and I know that this community rocks! :)

My 1993 LX 5.0 5spd Convertible has, like many convertibles, had the cluth position switch bypassed in favor of a kill loop. Essentially a platic clip with a wire loop that fits the clutch position switch connector. This allows the car to be started without depressing the clutch, but also provides an easy way to prevent theft by removing the loop and thus disabling the starter.

Yesterday, my wife and I stopped for gas on the way home and after filling up, the car refused to start. No clicking, no turning over, nothing. On a prior occasion when working on the car, I had kicked this loop loose and the car behaved the same way. Replacing the clip that time allowed it to start. This time I figured I had done it again, but the clip was still in place. Fiddling with it and other connections under the dash did not allow the car to start. Ultimately, we push-started it and got home. Today I'm trying to find out what's going on and fix it.

So far, I've found that the issue appears to be somewhere between the ignition switch and this clip. The wire coming from the ignition switch that feeds the clutch position switch (in my case, this "kill loop") is white/pink (according to my Haynes manual and other wiring diagrams). It has 12v in the "start" position. The clutch position switch wire is red/lt. blue. It has 0v in the start position. *Somewhere* between the ignition switch and the clutch position switch, this wire mysteriously changes color. I need to find this, but have been unsuccessful.

The whole point of this thread is that I'm hoping someone else knows how these wires connect. They don't appear to go to the fuse block, or anywhere else for that matter. It's all tucked up under there where I can't see or feel reliably. Wiring diagrams don't indicate any other connections, but they are notoriously incomplete...

If anyone has any ideas, please advise. I'm pulling my non-existent hair out :)
 
I guess I should have stated that the connector is near the left side of the transmission rather than 'at'. The connector sits on top of the transmission cross-member. The differences between auto and 5sp take place right after this connector. Where the auto has a W/PK that goes in to the Neutral Position Switch and comes out of the switch R/LB, with the 5sp the wire goes from W/PK to R/LB at the connector then stays R/LB the rest of the way to the starter relay.

My diagrams don't seem to want to work correctly with this new Stangnet interface. The thumbnails don't enlarge the way they used to.
 
Maybe this will help...


Typical start circuit...
Diagram courtesy of Tmoss & Stang&2birds
attachment.php
 
so I raised the car, but could not find the connector. I did notice that one connector (that has not been connected to anything since I bought the car) was resting on the new X-pipe I installed, so I removed that section of wire altogether. I have no idea what it's *supposed* to be used for, but it does have a red/lt blu wire in it (along with 3 others) that was exposed.

Could I ask for some more specifics? The connector I removed was about a 14-16 inch section that clipped into another wire which was fed through the same hole in the floorpan(?) as a connector that attached to the speedo cable. No other connectors are near the K-member on the driver's side of the transmission. Is this mystery section of wire related to the clutch position sensor? It has been loose as long as I've owned the car - just like several other connectors that I can't yet identify. With that said though, the car has started just fine for the month I've owned the car.

Maybe if I had a more detailed description of the connector I'm supposed to be looking for I could find it. I hate to be so demanding... but I just can't find it :(. Am I even looking in the right spot? Should this be near the speedo cable?
 
The connector you found should be the one I mentioned. It has a R/LB, W/PK, and two BK/PK wires. Normally there is an extension harness snapped into the connector. The two BK/PK wires go to the backup light switch on the transmission and there is a R/LB loop (shown in the second section of the diagram above) that connects the R/LB to the W/PK wire. Since the wiring no longer follows a stock diagram you're going to have to find where any other modifications have been made.