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a fuse of this size may be the ignition fuse or a fuse that powers high power draw units , fuel pump lights etc. However if it blows immediately then you have a dead short in that system like a failed relay or solenoid or a wire ribbed through or pinched shorting to earth. Carefully check wires from this fuse and look for the same colour coded wire on relays ,ignition switch starter solenoid etc.
The petrol gauge is a voltmeter. Therefore check the continuity of the wire from the sender unit first .Next if this is fine take the sender unit out unplug then check it is not jammed .Next put an ohm meter across the two terminals you should see a change on the readings as you move the float. Do you have 12v at positive to earth from the live wire ? if not check fuse and trace power..Last thing then (and this is the most difficult) get the gauge out and put 6v on the positive terminal and the other to earth. This should move the meter to around half .
This should locate the fault ,bet it is the sender unit in the tank.
fuel pump voltage should be 12 volts or as near to it. relay has a voltage drop, 5-6 volts means there is a bad connection, faulty earth or a connection wire, could even be the relay,, check the earthing wire follows from the pump or make a new earthing connection. clean the earthing points on the shell from the batter, put some grease over the connection when clean and tightened,
didyou replace the manifold heater?
have you checked the relay?have you checked to see if there is actualy power getting to the glow plugs? and also the fuse .
It is very srtange ,if the glow plugs are working ,for it not to fire up straightaway .Does it miss when it does first start?If so, the glow plugs are not all working.Last thing try giving it a squirt of aero start, or starter fluid , if with that ,if it doesn`t start straight away, then you better come back to me as i have another idea what could be a problem but I dont think the glow plugs are working properly so try the aero start first "youdoit"
Ok, here are the wiring colors and functions/destinations. C0030 is the motor connector for the front windscreen. C0030-1 - Black, runs to a Earth C0030-2 - White/Green - Fed from the front wiper relay, via the IDM C0030-3 - Blue/Green - Flick Wipe/Fast Wipe C0030-4 - Green/SlateGrey - Power from Aux Relay C0030-5 - Red/Green - Looks to be a speed control connection.
It's hard to tell to be honest, you'd really need to sit down with RAVE and the electrical circuit diagram and the operation description to make head or tail of it.
should only be a black for earth and red or yellow for power if u already have wired up to a powr source just connect to back of lighter if you dont ground the black wire to the mwal part of the car usually under a screw under the dash will do and run a red wire to 10a fuse in fuse box thats the easiest way
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