joe1 Posted February 19, 2017 Share Posted February 19, 2017 Just looking at a Def 90 F reg, where someone has disconnected loads of wiring, and trying to put it all back the way it was. This pic shows what I think are the 12v feed to the temp gauge and the blue/green that should go from gauge to the sender (the part of the bulkhead in the pic that these wires come through is just behind the brake m/cylinder). However these wires are not connected to anything at all! And I can't see any obvious points of connection. Also, when I traced the sender unit wiring back it appears to go through a multiplug and enter the bulkhead along with a lot of other multiplug wires in the centre of the bulkhead. Duh! So what should the standard set-up be? Thanks for any light you might be able to shine on this Quote Link to comment Share on other sites More sharing options...
western Posted February 19, 2017 Share Posted February 19, 2017 on pre Tdi engines the coolant temp sender was either on the thermostat housing or at rear of the cylinder head. what colours are the twin wires & single wire ? green/blue trace is coolant temp.as you've noted. Quote Link to comment Share on other sites More sharing options...
joe1 Posted February 19, 2017 Author Share Posted February 19, 2017 The single wire is blue/green, the twin wires are green. I should have said that vehicle originally was an NA diesel and has had 300tdi fitted as a conversion (so could these hanging wires be from the previous set-up? Quote Link to comment Share on other sites More sharing options...
western Posted February 19, 2017 Share Posted February 19, 2017 plain green is a fused ign switched supply. they are spare connections, my '89 110 has got them as well. as the main/dash area loom is common to all 90/110, with changes to some additional wiring for left/right hand drive & petrol or diesel engines. the single wire will be for the original engines temp sender, IIRC it was located at the left rear vetically in to cylinder head. see item 1 in http://www.albrit.de/epc.cfm?PAGE=G02100&CAR=L1&SPRACHE=EN Quote Link to comment Share on other sites More sharing options...
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