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Thread: Dash Light Dimmer Controls

  1. #11
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    Discovery Series 2 Instrument Light Dimming

    I have just bought a Series 2 SE7. Driving last night on our country road I noticed there's no dimmer for the instrument lights. Just great being blinded by the instruments when your on the lookout for kangaroos!
    Does anyone know of, or has made their own, dimming circuitry?

  2. #12
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    It's very possible that the plug to be there unused beneath the binnacle, see RAVE- Electrical library- connector views - C0201 , if you find it you'll have to buy a dedicated thumbwheel switch AMR2745 and fit it, if the plug isn't there you'll have to wire the switch yourself to header C0759 between pins 11 and 13 , not a killer
    Discovery Td5 (2000), manual, tuned

  3. #13
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    You wont find a connector ready to be used otherwise the lights would not be working at the moment. As stated earlier, some wiring changes are required to remove the direct connection to allow the switch to be spliced in. Find a D2 dimmer switch at a reasonable price first - new switches were way too expensive for me when the vehicles were new.
    MY12 RRV 4.4 TDV8 AB, +LLAMS, +e-diff, +ACC stop/go. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi

  4. #14
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    The wires from the dimmer switch to it's plug are:
    pin 1 = red/brown
    pin 2 = red/orange
    pin 3 = black

    you have to route the wires as follows:
    version 1:
    - red/brown into C0759 -13 (remove/cut the existing red/orange wire which is there !)
    - red/orange into C0759 -11 (this might be empty)
    version 2:
    cut the wire which goes into pin 13 and connect the red/brown wire from the switch to the side which goes into the header and the red/orange to the other

    - black to ground

    as in the attachments
    Attached Images Attached Images
    Discovery Td5 (2000), manual, tuned

  5. #15
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    I hope we can come up with a simple solution for the dash dimmer.
    I think the part number for thumbwheel switch is AMR27445?
    According to this old link anyway
    OEM Land Rover Discovery I II 95-04 Dash Light Dimmer Rheostat Switch AMR27445
    MY16 D4 TDV6 - with a little Cambo magic for towing "The Brick"
    MY95 RRC LSE Vogue Softdash "Bessie" (turning circle comparable to QE II) with MY99 TD5 and 4HP24 transplants. Back home Nov 22 after a magic overhaul by Chivalry
    SADLY SOLD MY04 D2a TD5 auto Classic and MY10 D4 2.7 both with lots of goodies

  6. #16
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    It's AMR2745, and the solutions are above your post
    Discovery Td5 (2000), manual, tuned

  7. #17
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    Thanks for the info. Sounds fairly straightforward. Do you know what the resistance values should be for the dimmer potentiometer? Jaycar has a wide selection.
    Cheers
    Hugh

  8. #18
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    Its not a potentiometer, its a 12v pwm signal generator that varies the duty cycle.
    MY12 RRV 4.4 TDV8 AB, +LLAMS, +e-diff, +ACC stop/go. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi

  9. #19
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    You can use any rheostat/potentiometer there up to 1KOhm, the original one has 1KOhm according to RAVE... and additional 5 Ohm for bypass, i dont see how a PWM signal would affect that simple electric feed for bulbs circuit though
    Quote Originally Posted by Electrical library - Decription and operation - 4.172
    NAS/Japan vehicles only
    The instrument illumination dimmer rheostat receives a supply on an RO wire
    from header C0759. The rheostat supplies a reduced power feed on an RN
    wire to the header C0759. The rheostat is earthed on a B wire to earth header
    C0018, via header C0760.
    IMO it would work OK with something like this too: http://www.ebay.com/itm/1-100W-Wire-...-/271175167011
    Discovery Td5 (2000), manual, tuned

  10. #20
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    I dont think its that techincal Graeme, on the schematics it looks like 2 resistors, one for Bright (1.3 ohms), the other for Dull (5ohms).

    Same thing could be replicated with a switch and a resistor, (looks like 5 ohms on the schematic).

    Untitled.jpg

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