[urq] Sender for the in-dash temperature gauge

[Tony Lum]

At 08:12 AM 6/21/2006, Louis-Alain Richard wrote:
>Hi again,
>
>What sender is the one to operate the 120C Coupe gauge that we will
>install in Eric's 1985 dashboard ? I have already a couple of 4000
>elbows, complete with senders, maybe one is the correct unit ? More,
>what modification should I do to the wiring to make this gauge
>functionnal ?
>
>Thanks in advance,
>
>Louis-Alain

Louis-Alain,

That part number is 049 919 501B which is used on 4kq's and coupe GTs.  2 
pin white sensor.  You can either place it in the rear of the head like the 
WX's (where it reads hotter) or up front like on the 4kq ( need to change 
outlet).  Remove the cold start warm up bulb (the blue warning).  This is a 
must, the bulb is attached to the same circuit.  Install the gauge.  The 
BL/BRN wire runs the gauge.  This should be hooked to the sensor that has 
resistance to the engine block.  The other pin that measures open (closes 
at 120C) is connected to the BL/Y wire which runs the overheat light 
flasher in the instrument cluster.  If you place the sender in the back of 
the head its plug and play.

Another safety indicator if you have the old style coolant recovery tank is 
to get the level sensor from a 4000 or 5000 turbo diesel (Type 43).  Cut 
out the plastic on the threaded fitting on the tank and install the level 
sensor.  You hook one pin of this switch to the BL/Y wire and the other pin 
goes to chassis ground so that a low coolant level will flash the coolant 
warning light just like on the '85 and later cars.


HTH,
Tony
'83 urquattro #302


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