Quote: aegir71 wrote in post #24

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could you point me towards a copy of the wiring diagram please, i'm a bit in the dark here! After poking about and following some wired I was thinking that the sensor on the top of the block at the front serviced the relay ECU, is this correct?

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From an electrician point of view I'd be thinking like this....

Is the fuse the correct size for the load...
What is the load on the circuit (use a clip on ammeter to test)...
Is there a bad cable breaking down under load/shorting out to earth?....move wiring away from bodywork/inspect

If glow plugs are staying on then the current draw will be minimum as the current draw decreases as the glow plug temp increases and the resistance drops

hi there,its a 20amp, i've blown a few myself...