Ford Sierra Manual

Trip computer components - removal and refitting
Body electrical system / Trip computer components - removal and refitting


1 Disconnect the battery negative lead Computer module
2 Remove the single screw from the top edge of the facia panel in which the module is housed, then withdraw the facia panel.

3 Remove the four now exposed securing screws, disconnect the wiring plug, and carefully withdraw the module. On later models a retaining lug must be depressed before the wiring plug can be disconnected.

4 Where applicable, the mounting brackets can be removed from the module by unscrewing the securing nuts.

5 If necessary, the illumination bulb can be removed from the module by twisting the bulbholder anti-clockwise using a pair of longnosed pliers. The bulb is a push-fit in the holder.

6 Refitting is a reversal of removal.

Speed sender unit
Models up to 1987
7 The speed sender unit is located in the engine compartment on the right-hand side of the bulkhead.

8 Disconnect the plug from the sender unit.

9 Unscrew the two knurled nuts from the sender unit and disconnect the two speedometer cables.

10 Remove the three securing screws and remove the bracket and sender unit.

11 Unscrew and remove the securing nut and washer, and separate the sender unit from the bracket.

12 Refitting is a reversal of removal.

Models from 1987
13 Detach the wiring, hose retainers and cover panel from the bulkhead to gain access to the sender unit.

14 Proceed as shown in paragraphs 7 to 9.

15 Remove the retaining nut and washer and withdraw the sender unit.

16 Refitting is a reversal of removal.

Fuel flow sensor unit
Carburettor models
17 The fuel flow sensor is located on the lefthand side of the engine compartment (see illustration).

22.17 Trip computer fuel flow sensor unit location - carburettor  models
22.17 Trip computer fuel flow sensor unit location - carburettor  models up to 1987. Bracket retaining screws arrowed

18 Disconnect the wiring plug from the sensor unit.

19 Refer to the УSafety first!Ф Section at the front of the manual, and the precautions in Chapter 4, then disconnect the fuel pipes from the sensor unit. Note that on models up to 1987 there are three fuel pipe connections, and on models from 1987 there are two fuel pipe connections. Be prepared for fuel spillage.

20 Remove the three securing screws and withdraw the bracket and sender unit.

21 Unscrew the four nuts and separate the sender unit from the bracket.

22 Refitting is a reversal of removal, but ensure that the flow direction arrows on the fuel inlet and outlet ports are correctly orientated, and that the arrow on the rear of the unit points to the top.

Fuel injection models
23 The sensor is located on the left-hand side of the engine compartment.

24 Disconnect the wiring plug from the sensor unit.

25 Refer to the УSafety first!Ф Section at the front of the manual, and the precautions in Chapter 4, then unscrew the two union nuts and disconnect the fuel pipes from the sensor unit. Be prepared for fuel spillage.

26 Remove the two securing screws and withdraw the sensor unit.

27 Refitting is a reversal of removal, but ensure that the No 2 injector fuel pipe is fitted to the sensor unit outlet port marked with an arrow, and ensure that the union washers are in place (see illustration). Tighten the fuel pipe unions to the specified torque.

22.27 Trip computer fuel flow sensor unit - fuel injection models
22.27 Trip computer fuel flow sensor unit - fuel injection models

A Wiring plug
B Hollow bolts
C Inlet port banjo connector D Bracket
E Outlet port banjo connector F Sensor unit


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