Please help me understand

Roverman97

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Jun 2, 2019
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This is out of a 1993 RRC. Please help me figure this out. After spending several hours on my truck trying to diagnosed why it won't start I realized this wire may be the offender. The wire with the black connector and red dot was loose/broken from the end and came right out. Now, this is my question. There is a ring that connects to the chassis, so it is grounded. The wire with the black connector and red dot was connected to another wire with a 12v reading. There was no voltage reading coming out of the other black connector going into the coil? So, what kind of reading was I expected to get at the coil? 12v or simply ground? It does not make any sense to me. If am supposed to get 12v to the coil with this wire why is going to ground? what is the purpose of this design? Thanks.

wire.jpg
 

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Roverman97

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Jun 2, 2019
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Hello Kevin,

Unfortunately it is not. The capacitor is sitting next to the coil. This wire goes to ground, but also has a 12volt feed (black connector with red dot) and no output going out of the other black connector (maybe because the wire is was broken from within). Not really sure. I contacted a couple of vendors already with no luck.
 

logan_gibson

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Dec 20, 2016
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Are those not some sort of spade connector inside the black plastic housings?

Couldn't you remove the heat shrink to see how you need to connect the new wires and make one? Looks fairly simple.
 

p m

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Wiring looms are all different for different years - but can it be the wire used to feed the ignition amplifier output to the ECU? The only way the ECU knows the engine rate of rotation is via this wire - if it doesn't have it, it won't fire the injectors (and even turn off the fuel pump after a few seconds).
 

Roverman97

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Jun 2, 2019
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Maryland
I removed the heat shrink and this is what it looks like 20190611_180938_resized.jpg20190611_180831_resized.jpg Are the 2 white wires connected to something else or just smashed together at this end and is basically one wire? Sorry for the question, I'm just not really good at this................20190611_180606_resized.jpg
 

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Roverman97

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here is another pic.20190611_180633_resized.jpg This is where I'm confused, the metal ring that bolts to the chassis connects to a metal wire going into the little black cylinder and then connects to the other metal piece holding the white wires together. So the wire going to the coil provides 12v or just ground?
 
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p m

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Again, it's been so long since I've owned an 89, so I can't say anything with any confidence.
My guess is that wire should have gone to the switched terminal of the coil.
 

kk88rrc

Well-known member
That's some weird homemade shit. I still think someone added another suppression capacitor.
Where did the two wire connect? If I read correctly one was to the + side of coil but where did the other connect?

Here's the wiring diagram from 1990 but I don't think it changed. #118 is the suppression capacitor.

Screenshot 2019-06-12 10.57.12.png
 

p m

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That's some weird homemade shit. I still think someone added another suppression capacitor.
Where did the two wire connect? If I read correctly one was to the + side of coil but where did the other connect?

Here's the wiring diagram from 1990 but I don't think it changed. #118 is the suppression capacitor.

View attachment 56746
White/black - white/black wire is what goes to the switched side of the coil. Looks like the one shown in original post.
 

Roverman97

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Jun 2, 2019
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Maryland
The black connector with the red dot was connected to a 12v line and the other going to the coil. I was not getting a reading at the coil, so I guess the wire was already broken before I pulled it out. Thank you for the diagram!!! I will take a look at it.
 

Blueboy

Well-known member
Apr 20, 2004
2,021
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Back in the USA; Rockwood, PA
It would be a personal embarrassment to me if rangerovers.net had better and more timely responses. There's nothing difficult about a Classic.
1000% agreed!! There is much more knowledge here regarding Classic Rangies let alone Rovers in general than any other site.

The Search function is awesome for archived info let alone folks answering current threads.

Now if I could only understand my Rangie so well that I could say there is nothing difficult with keeping the beast alive and performing well!! 😁
 
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Roverman97

Member
Jun 2, 2019
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Maryland
Glad you found it..... So what is it?

Well in all honesty, I still don't know exactly what is its exact purpose, but I can tell you is not home made. I got the replacement part out of another 94 RRC. Hopefully, I will be able to start the truck once installed. Thanks to everyone that tried helping out. Really appreciate it!!!!!!!
 

CORover

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Jun 11, 2007
493
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Colorado, USA
It would be a personal embarrassment to me if rangerovers.net had better and more timely responses. There's nothing difficult about a Classic.
I posted this response before he said it was a classic. For 1996 and newer, I stand by my opion that RR.net is better than DWeb for Range Rovers. Sorry, not a slight against the site, I love it and the work you continue to do. I have 2 discos and 2 RR. Especially for the P38, which get no love here, that site has world wide attention and gets responses around the clock. I have asked for RR help here several times and got crickets, over there I got answers.

I will even do a test; I am about to post the 2 P38s for sale and I will do it on both sites. We can see how it goes.
 
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