Thickish Brown & Red bulkhead wire

Help please on identifying a wire.
I am in my 2nd year of rebuilding a 200tdi 90 and have a spare wire
I have a thickish Brown (with Red tracer) coming out of the loom about 3 inch from where the loom comes through the bulkhead into the engine bay. It has a eye termination on the end of the wire and is about 10 inches long.
I have traced it wire back to behind the dash binnicale but loose where it goes. Will try again later when i can remove more of the dash panels.
I have tried to take a photo but its too dark on my phone so will try again when i get home.
Does anyone know where this terminates within the engine bay please?

The only wires I had in the engine bay that had eyes were some grounds and also the wire for the glow plugs.

I can check when I get home, but I don't remember any "live" wires with eyes.

I've almost finished rebuilding my 200tdi - am just finishing off last bits of wiring in the dash and behind the speedo (which has included fitting an alarm) .

I do have a few unconnected or partially connected plugs in the engine bay, so perhaps we can swap notes!

Thanks for the quick reply - I took about 300 photos of the strip down but cant find any that show this cable.
I was assuming that because it was mainly Brown it was live??

Yea...that's what the colour suggests - the only brown wire i've seen with eyes is the one that goes to the battery.....

Unless there's one at the back of the starter? I'm pretty sure there isn't - I think it was just the big thick red wire plus a thin white wire from the ignition

http://www.expeditionlandrover.info/Lucaswirecode.htm

This will help.

Or this

http://www.dimebank.com/LucasColours.html

Or you could look for a more year specific chart.

Will it?

I had a look there and no brown/red trace

Looking at those charts I'd be inclined to follow the wire under the assumption that it might not be factory fitted.

gse1986 said:

Will it?

I had a look there and no brown/red trace

Click to expand...

http://www.dimebank.com/LucasColours.html

Compression ignition starting aid to switch

Main battery feed to double pole ignition switch

Do you have the workshop manual with a wiring diagram?

No workshop manual just the Haynes one. which is 1986-1991 or 1991-1994. mine is a genuine defender 200tdi @ 1991 so could be an overlapping.

http://www.defendersource.com/forum/attachment.php?attachmentid=69640&d=1365256827

According to this the brown/red is glow plug/ignition circuit.

So, i'm wondering if it fits to the glow plug post.
This is also the same stud that the Yellow/Black (If i remember correctly) wire fits to from the Glow Plug Heater Relay (PRC6913)?

If you already have a wire from the relay to the plugs I doubt you need another wire going to the plugs. My guess is its on the ignition side, perhaps for the lamp on the dash?. You really need to find a wiring diagram.

Seems most likely to be the glow plug supply - the colour and length support that. If you could post a picky of your current connections to the glow plug control unit it will help. You probably have a bit of pre TDi and TDi wiring - my 1990 200TDi did. Of course, if you put a meter on it and you are getting 12v when the key is turned to the glow position it will prove it too. A good TDi doesn't need the glow plugs anyway - it will start on compression alone.

Thanks for all the input - apparently its a wire, pre existing from the 2.5 n/a & TD era that went to Glow Plug 4 from the ignition to hold on to warm up. but mine has the Glow Plug Heater Relay (PRC6913). So infact Nobber you were spot on with your findings of "brown/red is glow plug/ignition circuit." and Zeaphod correct about the mix of looms from cross over models. So thanks everyone!

As has been confirmed it is a glow plug feed - the other end of it is behind the dash with a 10mm spade on it that goes into a relay on mine, however, it should be connected up via the ignition switch to operate on the glow plug stage you held it in on the 2.5NA-TD's - mine was a petrol originally so I fitted a relay back there.