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Old 1st November 2018, 13:38   #21
Dorchester2
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Thumbs down Lost & desperate

What I've done so far to no avail?

- taken off the the battery & light switch control unit that looks neat, clean & as good as possible. Put it back.
- taken off the bumper.
- taken off the light blocks on each side.
- swapped the dipped beam bulbs just to be sure.
- all the wires looks clean, neat & as good as possible. No cut wire, no bare part, no corrosion & no moisture at all anywhere! (I can post a picture a bit later).

What's the result?
Nothing!
Bulbs look good since the left one is now on the right side, and again lighting on that right side when the left one (with the right bulb) looks desperately dark!

So far I haven't switched off the battery and didn't tested the inside fuses.
The 10 engine bay fuses looks as good as possible.

What could be my next move now?
Where could be hidden the nasty culprit?
Please...
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
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Old 1st November 2018, 14:03   #22
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In the engine compartment fusebox you have 10 fuses and 12 fuselinks. Seems to me that you did not check fuselinks #9 and #11 I mentioned.
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Old 1st November 2018, 14:08   #23
Dorchester2
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Question

Some pictures, first the engine fuse box (@Roverlike all fuses looking as good as possible included #FL9 and #FL11) then 2 pictures of my left light block connector and wires.
I must precise that the inside of both light blocks look neat & clean as well.














What could be wrong so far?
I'm gutted & cross: all is lying on the ground, I fell totally useless without any valuable clue!
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
  • This vehicle was the 7,517th 75 to run off the production line, out of 112,381
  • This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214
  • This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s

Last edited by Dorchester2; 1st November 2018 at 14:42..
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Old 1st November 2018, 15:11   #24
Mike Noc
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The LSM connector for the LH dipped beam is CO937-7 and is a mauve coloured cable. Try unplugging it and checking for continuity and a short to ground.
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Old 1st November 2018, 15:18   #25
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Have you removed and inspected the light control module? Once you've taken it out and disconnected the multiplug, prise off the black slotted cover and look for corrosion on the circuit board.
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Old 1st November 2018, 16:06   #26
Dorchester2
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Quote:
Originally Posted by Tenesmus View Post
Have you removed and inspected the light control module? Once you've taken it out and disconnected the multiplug, prise off the black slotted cover and look for corrosion on the circuit board.

I've removed it and examined it closely. I've already told it is neat, clean & without any damage. All that I can see of the printed circuit is shiny & tidy. Connectors are fine.

No corrosion at all neither inside nor in the engine bay or anywhere else, from what can be obviously seen.
She spent her 13 first years of ownership in one of the sunniest & driest area in France, near Perpignan, close to the Spanish borders.
Since then she didn't move very far North.
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
  • This vehicle was the 7,517th 75 to run off the production line, out of 112,381
  • This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214
  • This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s

Last edited by Dorchester2; 1st November 2018 at 16:16..
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Old 1st November 2018, 16:16   #27
Dorchester2
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Question

Quote:
Originally Posted by Mike Noc View Post
The LSM connector for the LH dipped beam is CO937-7 and is a mauve coloured cable. Try unplugging it and checking for continuity and a short to ground.
LSM? Could you tell me what's that?
I can't find anything with "CO937-7": would you provide me with a link or picture?

I've had a close look inside each light block L & R: all is fine, every brass (or copper) bit looks shiny & without the slightest hint of corrosion.

But I cannot test anything in those plugs: my multimeter cannot show any voltage even when I turn the light button inside and test the good right side.

I should have add that the main beam is fully working on every side left & right.
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
  • This vehicle was the 7,517th 75 to run off the production line, out of 112,381
  • This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214
  • This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s
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Old 1st November 2018, 17:21   #28
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Quote:
Originally Posted by Dorchester2 View Post
I've already told it is neat, clean & without any damage. All that I can see of the printed circuit is shiny & tidy. Connectors are fine.


Je m'excuse de ne pas lire correctement.
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2005 Connoisseur 2.5 auto SE Tourer in BRG with Sandstone Beige and Black piping interior (the 2nd of only 7 Rover 75s produced 5th November 2004, and it’s the 244th of 303 facelift British Racing Green 75 tourers built worldwide). All I've done is add Rover walnut gear knob and handbrake...

2016 Vauxhall Viva SL (Father Jack) "assisted manual" (auto) in purple. Going rusty underneath already...

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Old 1st November 2018, 17:50   #29
Dorchester2
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Quote:
Originally Posted by Tenesmus View Post


Je m'excuse de ne pas lire correctement.

My turn To apologize if you felt offended.
I appreciate very much your kind help and still waiting the solution to my problem.
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Rover 75 V6 2.5 Auto Connie born 1 July 1999, 24 kOhms resistor, 10 kOhms manual starter, full E85, modified airbox, full derestricted SS exhaust line, power & torque remap -> 202 bhp
  • This vehicle was the 7,517th 75 to run off the production line, out of 112,381
  • This vehicle was the 1,190th 75 2.5 V6 Contemporary to be made out of 8,214
  • This vehicle was the 2,032nd 75 in Atlantic Blue Pearlescent (code: JEY) to be made out of 2,572 Atlantic Blue Pearlescent 75s
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Old 1st November 2018, 18:05   #30
Mike Noc
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Quote:
Originally Posted by Dorchester2 View Post
LSM? Could you tell me what's that?
I can't find anything with "CO937-7": would you provide me with a link or picture?
The LSM is the light switch module. If you unplug the connection on the top that is CO937. Wire number 7 on that plug is mauve, and that is the one you should check for continuity and a short to earth.
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