HI guys finished off replacing my transfer & gearbox, went to fire it up to go the the exhaust shop (modify exhaust to fit around hi cap lt230 sump) 100m, dead....electrical smoke... car dead no reads, no radio/no nothing. seems I've crushed the wires in the process of removal/refitting
pushed it back home pooped the hood rummaged around found that the white wire in the harness that runs through the fire wall on the passenger side (under the glass fuses) has melted along most of the length of the engine side of the harness.
The car is an 83 RR which has had an 86 flapper efi conversion...so my manuals are useless for determining what the wire is.
I've been told that its probably the constant power to the ecu (which is fused). unfortunately i had to go to work so i haven't checked if the fuse was fine.
can some confirm that and/or give me some other ideas on what else to check, probability of the ecu surviving, reason why the auxiliaries would not be working (door lights/ radio etc.)
Plain white is unfused ignition feed in Lucasspeak. Probably the wire to the ignition coil. Anything to do with the flapper EFI will be in its own loom to the ECU so can be easily discounted by looking at that loom.
That wire will go all the way to the ignition switch. The loom runs behind the heater box up the column. You should also check all of the solid green wires as IIRC these are all ignition switched. And only fused at that one fuse where you've melted the white wire.
I did a complete rewire on my 82 after a similar thing happened. Melted my whole loom from the ignition switch to the tail lights
yeah thanks for that. I pulled some of the dash and checked it out.
wire only burnt from the 8 prong plug behind the inlet manifold to the fuse holder I inspected the wires either side of this...no idea why it didn't continue on.
I replaced the wire cleaned it all up and then put it all back together. I manged to pull the wires out of one of the relays, and cause i don't have the wiring diagram I'm not sure how they go back together. there a to relays near each other. the pic show the wire colours not the right location though...
it doesn't start, doesn't even kick over, so got to see if power is going to the starter now.... would this relay have something to do with it?
*anyone know why this was moved to 'Range rover', cause it clearly electrical related, though car specific, others in the electrical thread are car specific, so nfi why this was moved. (makes it hard to work out where it belongs)
The relays look non-stock, but whoever fitted them must be using the original engine harness from the '86 vehicle. So the wire colours on the '86 wiring diagram for EFI should still be traceable. I suspect these relays are the main relay and fuel pump relay, possibly the starter relay although it's hard to see the colours exactly.
First off, get your multi meter and look for +12V at the fat brown (no colour stripe) wires, alternator output terminal, the back of the ignition switch etc. Then work out where the break is and fix it. You may need professional help if you can't trace power flow by following wire colours through the harness.
Most relays are wired so there is a signal in on terminal 85, earth on 86, battery power in on 30, output on 87. There are variations on this involving the earth path, ECU switching is often on the earth path and ignition on the signal side. This is basic 101 electrics and if you don't have this knowledge, either you need to learn it quick or get someone in who does.
got spark, got crank now (not sure how we got crank - it just started working...) and the fuel pump works...and it goes with start ya bastard down the throttle, - so fairly confident the issues is fuel injection related
didn't have a led tester for the injector pulse so that's tonights job + the battery was going flat
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Master
to check the rest of the loom, cause i cant really see the continuation of this loom after the fuse holder.
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