I HATE electrics...(won't turn on)

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IamRobbie

Well-Known Member
Posts
2,800
Location
Derbyshire, j28 M1
Ok so I've just put a discovery 200tdi into my 90, every this has gone well except for the electrics!!!

I have made sure my engine block is earthed to the chassis right next to the engine mount.
when i swapped the engine i kept the old starter motor, the power cable from the starter goes from the batter to the starter and also has 2 brown cables attached to it from the loom..

I then have the little white and i think red wire that goes from the loom onto the little spade connector, if i hold a multimeter on this spade when some1 tries to turn over the engine it only reads 5volts, i thought it needed to be 12..

No blown fuses at all..

When i go to turn it on i get all the lights on the dash except the battery light, I think this is because I have put the thin brown wire on the alternator to the letter W.... :confused:


the two brown wires are together on the alternator and go to B+....

I got a long screw driver and touched the two parts together on the starter and it whizzes around so the starter works..

Any ideas before i set the thing on fire? :violent:


Also before i removed the old 19j engine I must admit that i did undo more than just the loom wires and I haven't got a clue where they all go...

I guess I'm a little screwed.. lol

thanks in advance!
 
for the alt bit :

w is tacho, you need the warning light to go to d+

think it's brown/yellow on your loom
 
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the white/red feeds the solenoid and the other wires come from the battery...is the solenoid earthed as ?

also fit afues to the starter..

i think only the newer ones are mega fused (if you mean bat -> starter)

afaik, you don't need fuses on starters (i'm not on about solenoids) as they should only be on for a few seconds and the wires aren't rated for the current anyway.
 
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the white/red feeds the solenoid and the other wires come from the battery...is the solenoid earthed as ?

also fit afues to the starter..

I thought that the earth was the starter to the block itself?...

Ok so ill swap the W to D.. I guessed that W was for warning lol :)

Can anyone make heads or tails of this lol?...

electrichell.jpg



Ive been searching the net and I've decided that I'm going to take off the earth from the chassis to the side of the engine and clean that up with a wire brush and try it again.

Also i need to see where the earth to the bulkhead should go although i haven't even touched that while swapping the engine.
 
Have i missed an earth on the back of the starter or does its body earth as its attached onto the flywheel housing?...

easy enough to test. go stick a jump lead to neg batt and the other to the starter casing. try cranking
 
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Think ill go have a drive over to it tonight and try it!!

Just the starter casing?

to test the earth yeah.

btw, you know you don't *need* an alt to get it running? if the starter spins but the engine still isn't firing, then also check your fuel solenoid has power
 
Starter earths through the block. You need the ignition wire (white with red trace) connected to the starter solenoid.

Swap your alternator W and D.

Fuel solenoid needs to be connected (can't remember colour, but I'll check if your stuck).

That's all you need to run.

Beyond that, there is the glow plugs, oil pressure switch, oil temp (if you have it), and water temp. Think that's it for the electrics. The rest should be connected anyway.
 
Also, did you bleed the fuel lines? You can bleed upto the lift pump without the solenoid on. When I did mine, I bled the fuel system upto the fuel filter, then I turned over the engine for about 10 secs with the fuel solenoid disconnected. Then when I connected the fuel solenoid she fired first time.
 
Also, can't see your fuel filter housing in the picture - which one are you using the 200 tdi one or the td one? Picture of your connections would be good if it's the td one as they are different for the 200 tdi.
 
That's the prob spook I u did so many without thinking like a real dumbass lol!!

Just been up to it and put the small white n red one back on earthed the starter motor to my earth on the battery for the discovery as it was running. Nothing. Where is the fuel solenoid? The green wire is on the temp, the oil pressure is on near the oil filter the glow plugs are 12v when the switch is on inside.
 
That's the prob spook I u did so many without thinking like a real dumbass lol!!

Just been up to it and put the small white n red one back on earthed the starter motor to my earth on the battery for the discovery as it was running. Nothing. Where is the fuel solenoid? The green wire is on the temp, the oil pressure is on near the oil filter the glow plugs are 12v when the switch is on inside.

just do one thing at a time. I'd start by getting the starter working.

So stick the solenoid wire(red/white) on and the battery cable. then try turning it over (assuming you have a decent battery hooked up)

report back if it even attempts to start, you hear clicking,etc
 
1 click on first ignition 2nd click when it would start firing up, so yes the clicks are there. and this is with the main red battery cable from the positive to starter from the battery, tried 3 batteries, 1 off my disco, 1 that isn't a year old and an old 1 off my disco that still works..
 
1 click on first ignition 2nd click when it would start firing up, so yes the clicks are there. and this is with the main red battery cable from the positive to starter from the battery, tried 3 batteries, 1 off my disco, 1 that isn't a year old and an old 1 off my disco that still works..

i meant the starter solenoid clicking. try shorting the lil spade to the post the battery wire goes to, it should try to start the engine.. be careful!
 
i shorted the + and - together and the starter spun, i know the lil wire makes it stick out into the flywheel gear then spin, i can get the starter to spin but i know that the little wire is only putting out 5volt on the multimeter
 
i shorted the + and - together and the starter spun, i know the lil wire makes it stick out into the flywheel gear then spin, i can get the starter to spin but i know that the little wire is only putting out 5volt on the multimeter

i was just wanting to confirm the solenoid actually works properly (comes out and turnsthe engine) before mucking about with the 5v wire ;)
 
Like trax says, I think you need to rewind a bit and go back to basics.

Test that the starter works. Disconnect everything from the starter. Using jumper leads, battery - lead to engine block, battery positive lead to main + terminal on starter. Nothing should happen at this point. Make double sure the beast is not in gear and use a screwdriver to carefully short the small solenoid terminal to the large + on the starter. At that point the engine should try to fire.
 
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