Technical Disconnected wires on fuel Sending unit

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Technical Disconnected wires on fuel Sending unit

Pauld4950

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Initially I thought it was a fuel gauge problem. Needle on gauge is at zero and orange warning light flashng. On investigation I found 2 of the 4 wires on the fuel sending unit plug have been chomped through by a mouse. I store my 2014 Fiat Ducato in a storage unit next to a farm.
(a) I need to know how to remove the 4 way plug on the top of sending unit( it has a yellow locking device),
and
(b) the colour codes and order of the wires. I may have to purchase a new plug. Does anyone know where I can purchase fiat electrical spare parts.

Can anyone help withthe above.
Pictures attached
 

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Hi Pauld

The tank unit has 2 wires to the submerged low pressure fuel pump, and 2 thinner wires to the fuel gauge. The colours for 2008 models are as follows, but yours might be different :

Pin 1 Fuel Pump 2.5 square mm Grey
Pin 2 Fuel Pump 2.0 square mm Black/Violet
Pin 3 Fuel Gauge Sender 0.5 square mm Grey/Black
Pin 4 Fuel Gauge Sender 0.5 square mm Grey/Brown

Pin 1 will be at one end of the row, if you are lucky there may be a tiny number on one of the connectors, but if not the wire thickness should tell you which end is which.


It looks to me as though there is just enough wire left in the plug to solder the broken wires back on to, using heatshrink sleeving to insulate. This is probably your cheapest option.


Alternatively a new plug and loom could be joined onto the old loom using a screw type connector block ("chocolate block") insulated with tape afterwards. I very much doubt you will find a connector/loom on the open market, your choice is either a Fiat dealer (£££) or a Breaker
 
Hi Pauld,

My approach would be to follow Anthony489's advice. He seems to have overlooked the fact that his information matches with your photos, as regards pin numbers and colour codes.

If you cannot manage to solder to the short ends of the fuel gauge wires, it may be possible to extract the individual female connector pins. My favourite tool for that operation, is a small jewellers screwdriver.

For information the connector housing appears to be an MTA HP6 4-way, which have two physical coding variations. (See attached file.) This type of connector is not readily available in small quantities, but perhaps HP6 280 inserts could be found.
 

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