Complete electrical power loss

Hello just got a 94 discovery diesel had been sitting a while engine turned over no problem engine running brilliant I tried turning the Lights on engine cut out now no power at all terminals aren’t even spark when I checked with another battery checked the 100a fuse and it’s fine any help would be much appreciated thank you

There were two model year D1s availability in 1994 and having a different electrical system, so which one is yours 200 or 300 ?
Have you checked the engine, chassis, body earth connections to the battery are okay

Is there a seperate main power relay?

It’s. a 300tdi no sparks are nothing from battery checked with multi meter it’s full charged yea check earths was running sweet just soon I turn lights on engine cut out and no dash lights are power thanks for your reply

lynall said:

Is there a seperate main power relay?

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Not sure I check the screwed in fuses in the engine bay all were good

Run a temp earth from battery to chassis/engine

Tryed that not I ran a circuit tester connected to the positive and all the fuses in the engine bay lit the check the one under steering wheels some were lighting and some not when removed fuses were in tact would the ignition switch cause issues like this thanks

mickeytree said:

Tryed that not I ran a circuit tester connected to the positive and all the fuses in the engine bay lit the check the one under steering wheels some were lighting and some not when removed fuses were in tact would the ignition switch cause issues like this thanks

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Sorry, without a wiring diagram I would just be guessing ref the ign switch.
I would say start at the battery and work your way on from there, take nothing for granted, ie its new/looks good, that means nowt you need to confirm it actually works.
Have you load tested the battery?

Wouldn’t be that clued up on the electric side of things I connected an other battery nothing not even spark when connecting terminals which is strange what best way to start checking wires thanks for your reply

I ran a wire till the alternator lights on the lot I checked the continuity it reading -455 and beep could the mean fault in wire are the alternator itself thanks for ur replies

Have you checked the fusible links on early models seven fusible links hidden in loom in engine compartment wrapped in gauze material on later models engine fuse box see attached

I didn’t even know there was one will check after work thank you

mickeytree said:

I didn’t even know there was one will check after work thank you

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Don't bother, that's a bit of mis information, you stated u have checked the fusible links post #5.
Thats the MF fuses 1 to 6 as shown in the diagram.

Am new to car electronics I think I was doing the circuit tester wrong was feeding off the positive and everything was lighting up checked with earth and no power anywhere I ran a live to the alternator and everything came on does this mean the alternator done and maybe the wires thanks you for your reply

mickeytree said:

Am new to car electronics I think I was doing the circuit tester wrong was feeding off the positive and everything was lighting up checked with earth and no power anywhere I ran a live to the alternator and everything came on does this mean the alternator done and maybe the wires thanks you for your reply

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Ok, was the temporary live you ran was directly from the battery pos + to the alternator + ? If so it means there's a fault in the existing wire. If "every thing came on" what ever that is, then did u try and start the engine?

Issue sloved thanks discool and the the rest Of the members I went over wires checking continuity and found the culprit . Replaced it with the one from my other disco prefect thanks again

Well, well who would expect that. The first pic shows the cable without any installation and a bit of corrosion but what else was wrong? The replacement looks good.
In all my time it's a first... so 'Very Well Done' ️️️️️

I'll be looking at my link to the fuse box tomorrow.

Got the pics mixed up curiosity got the better of me so after I replaced it I stripped the old one to figure were it all went wrong

mickeytree said:

Issue sloved thanks discool and the the rest Of the members I went over wires checking continuity and found the culprit . Replaced it with the one from my other disco prefect thanks again

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Good find.