Classic Classic wiring and leccy japes-a-plenty

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Thanks Pete.

I just meant input as plug from coil and out to dizzy. Who knows for sure, I'm not sure it means much.

I'm off to work on my lawnmower now.
 
An Autofactors near me - Unipart - have a device that can test iggy amps....they charge a fiver if it works OK, or the test is free if you buy a new one cos its fecked.....maybe a local factors to you has a similar service.....
 
Okay, all fixed in and turned the key......no spark.

I traced the white wire back to a join and then it doubles back to a connector and then turns into a blue\white which goes to fuse C3. This is what the ignition switch connects to. So....could it be the ignition switch? What test is there for the switch?

I'm getting max voltage on both the + and the - on the coil with the ignition turned on.
 
I have found some documents about the 3.5 EFI system and fault-finding process - they might help (or at least give you some ideas) though I appreciate yours isn't a 3.5.

Good luck

Pete
 

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  • maint_fuel_injection.pdf
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  • Rover_3.5EFI_System_Information[1].pdf
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  • Rover_3.5EFI_Test_Process[1].pdf
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I had an ignition switch go bad in a 93 rrc. Ended up putting a new key and starter button in the kick panel and leaving the original key in so the steering lock didnt come on
 
Crank position is pos 3......ignition is pos 2....does everything else work when ig is at pos 2? i.e. radio, heater fans, windows, etc etc??

If they do, it may not be the switch, but could be the wiring thereto for the ignition circuit...
 
The battery was tested as fine, but not perfect. Everything works at pos 2..blower. lights, etc. There has to be something going on between the blue white wire and fuse c3 or from the ignition switch onwards. That's the task for today.

Silly question, but is there a relation of the tacho wire to the coil. I assumed earlier models had something, but later models do not.
My tacho comes of the alternator.
 
The battery was tested as fine, but not perfect. Everything works at pos 2..blower. lights, etc. There has to be something going on between the blue white wire and fuse c3 or from the ignition switch onwards. That's the task for today.

Silly question, but is there a relation of the tacho wire to the coil. I assumed earlier models had something, but later models do not.
My tacho comes of the alternator.
Looking at the circuit diagram, it goes through splice S264 which would go to the Diesel components, then connector C108, then another splice at S105 which goes to the coil and the iggy amp.

Have you checked connector C108 for any signs of corrosion?

You could also setup a fly lead with a 10A fuse in-line direct from the battery to the iggy amp and also to the coil to bypass the White/Blue wire from fuse C3 in the dash fuse box.

Have you measured the voltage at Fuse C3 and then also at the end of the wire at the iggy amp or coil and see if there is any variance in the voltage readings as this could indicate issues?

Tacho wire -
Looking at the 1992 wiring diagram it doesn't show the coonection via a resistor to the speed module, the 1993 wiring diagram does show this. It appears to go to the speed trip module (Z164) which is not listed in the circuit operation description - I am not 100% sure what this does or is for....I know the ECU gets an engine running signal from the coil in the later models but not 100% sure!

Have you seen this document - not sure if it is applicable to your setup, but worth a read, you may pick up on something
 

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  • flapperEFI.pdf
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Thanks for the efforts. Much appreciated. Currently I'm looking at all splices and solder joints to see if summit is going on. I'll do the wire bypass when I get back from walking the dog. Some interesting reading in that document. Thanks again.
 
I've got nowt at fuse C3 0.01ma

So....tracing that wire from fuse C3 (big fat white one) , it appears to run straight to the ignition. So, that's for tomorrow if I can find time.
 
To continue: I have 12v on fatty white wire at ignition switch. Said wire runs in to the main loom to the right and I assume it twists back towards the fuse box on the left. Hmm.

Tell me, what is the big pile of black wires that run in to a connector that's bolted to an earth on the side wall at the kick panel? Is it just a bunch of earths?

On the fuse panel, fuse c4 is the fuse for Petrol Injection Unit and Petrol Pump Relay, or so the handbook says. It reads bugger all on the meter.

12v at the EFI relay.....
 
Duff probe on me meter. Got 12v all the way to the coil, ignition checked and good. Still no spark. Suspecting ECU or distributor, but I get no spark after coil lead again?
 
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