I didn't find the old thread on this; it may have been within the lost month.

The wire from my temp sensor, the one aroundt the glow plugs, is not attached to anything. Just a dangling connector coming out of the wire harness near the glow plug relay. Another forum member had similar issues, but his pictures clearly identify the wire coming from the firewall, with green insulation, but I have no such wire!

Yesterday I pulled the instrument cluster, which was basically a waste of time, as the rear of it to that particular set of gauges is a big bundle of wires with black outer covering. I found that bundle coming through the firewall, running down along the driver side fender, splitting off into smaller bundles, routed to lights, relays, fans, all sorts of stuff. I have no single green wires anywhere. I do have two connectors not on anything though.

One is a flat, thin connector into which goes a brown, and blue-green wire. The other has a black or dark grey wire and brown. One of these probably used to go to the aux fan in front. The other is in that vicinity, but I have no idea. Grounding either of the colored ones has no effect on the temp gauge. It is, of course, possible that the gauge is just bad, but since I'm quite certain it's disconnected, that seems like the logical place to start. Does anyone know if there is another wire I should be looking for coming from the firewall side? I'm tempted to slit that bundle to see if it's broken off inside there, but don't want to create more problems than I identify. Anybody know what the temp wire is bundled in?

I suppose I should mention we're talking about an '84 300D, although the engine is an earlier rebuilt non-turbo.

Ben

dont know if this has any thing too do with your problem but on the earley 123s there were two sensors in the head, one for the GPs and one for the temp gauge.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

Yes, this has just the one. There is another sensor over above the thermostat housing. The one I'm concerned with is the one that goes accross from the block in the wire harness to the GP relay. It is green under the protective coating. The wiring diagram for the instrument cluster shows a green wire coming from the temp. sensor, and I've previously seen a picture someone posted with a green wire from a guy that had a broken connector, into which my dangling connector plugged.

What I'm hoping is that someone will take a peek under their hood and see where the wire going to this round single pin connector comes from. Which bundle should it be coming out of from the big bundle that runs along the driver's side and peels off into a lot of smaller bundles in the vicinity of the glow plug relay

Thanks for your response

Ben

The wire coming from the sensor in the head on my 240 (79 body, 80 eng & interior) goes over the top of the brake booster and into the bundle then through that "cow's tits thing" into the cabin..... It doesn't "plug" into another connector. Maybe someone with a "newer" 300 will know, sorry.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

I had another guy nice enough to show me a similar picture, in which his green wire went to a connector on the firewall that 'plugged' in. Not like mine, so far as I can tell.

Anybody else?

Ben