Wizard
Hi, I'm fairly new to using this forum. I have a question about RRC's and burnt out looms.
I have 2X RRC an '86 and I recently purchased an '88 with the intention of making one good one out of the 2. Also I have to look like I'm making an effort to out perform my mates 80 series.
I had to rewire many melted wires behind the dash, particularly from behind the heater unit all the way through to the ignition switch in the '86 Rangie a few years ago. I was frustrated because I never worked out what went wrong. It was obvious there was one small white wire which got hot and melted others around it. I simply replaced the damaged wires and fitted a fuses box to prevent future failures. Which I am happy to say I have experienced none.
I have found the same white wire has gotten hot in the '88 Rangie but before taking out many other wires like in my '86, someone cut the wire. Fortunately for me I can see more directly where this wire goes. It appears to go the fuel pressure regulator. Well it did before it came off and shorted out on the engine. The previous owner then preceded to do a straight gas conversion by the looks of it.
I was wondering as I have experienced a 100% failure rate with Lucus electrics in my Rangies, has anyone else experienced this same failure?
Cheers
AT REST
Plain white in Lucas-speak is for unfused ignition circuits, mainly the feed from the ignition switch to the fuse box and the ignition coil. I can't see how a fuel pressure regulator has a wire connected. You may mean the over-run vacuum cut-off fitted to flapper EFI systems. This cuts the white/black stripe wire feed from the negative (pulse) side of the ignition coil to the ECU (rpm signal) and is white with a black stripe usually.
Wizard
Yes, that sounds like the part I was referring to. A vacuum operated switch at the back of the engine behind the intake plenum. Connected to the fuel rail. The wire might have been white with a black stripe once.
But the wire inside the car after connector is definitely only white. There are 3 white wires which are connected together just to the left of the heater unit. The one that is melted then goes into a white 6 or 8 pin connector under the steering column and out to a single male spade crimp. which looks like it connects to the over-run vacuum cut off you mentioned.
It is definitely not fused as you also mentioned.
I guess I could have more than one melted wire and I have confused the two? But I'm pretty confident it is only the one.
AT REST
I don't have a wiring diagram or vehicle handy to check on, but you are likely right. IMHO the vacuum switch controls a relay adjacent to the ignition coil and shuts off the signal by opening the contacts under high vacuum. So plain unfused white should be there.
Wizard
SupporterThe white wire is the ignition feed, and the ignition load relay output. It'd be worth checking the ignition load relay for starters, it's the only small black relay in the relay bank on the steering column.
Neither of them are fused, so it could be anything causing it, chaffing, or a componant shorting out. Is there anything electrical in the car that doesn't work properly?
Wizard
I'm not really trying to be a smart arse, but we are talking about a Range Rover Classic with Lucas electrics. Is the a rhetorical question?Originally Posted by benji
The rear window wiper motor doesn't work, the rear electric windows don't work, the central locking doesn't work. The starter motor doesn't work. THE HEADLIGHTS DON"T HAVE RELAYS - what is with that? The car has been taken off petrol and converted to straight gas. I actually have a fair bit of work to do before this car is up to standard.
I was actually just curious if anyone else has experience the same issue. I assume others have given the extensive knowledge of the wiring loom and colour codes. I had to look up the circuit in the 2 book Land Rover manuals I have.
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