Speedo illumination / rheostat

For all those wiring gremlins we love, this is the place to discuss them.

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fitz
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Model: Excel SE
Colour: Calypso Red
Year: 1987
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Speedo illumination / rheostat

Post by fitz »

Hello all,

Just to tidy up the couple of minor niggles, the speedo is a bit dim and has uneven light so i think a bulb has gone, is this user replaceable? Also, is the rheostat control supposed to be backlit - i have a feeling it was then i turned it to play with it, and it went out?!!?!

has anyone replaced the standard bulbs with led replacements with good / bad results?

Tia
1987 Calypso Red Excel SE
2004 Corsa 1.3 CDTI

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amarshall
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Re: Speedo illumination / rheostat

Post by amarshall »

Dash bulbs are easy - drop the steering wheel to its lowest position.

4 screws hold the veneer trim on
a further 4 under the trim hold the instrument panel in - ease it forward and you can unscrew the speedo cable, after that - it's a piece of cake!
https://www.lotusexcel.co.uk/
SORN - just say NO!

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hodders
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Re: Speedo illumination / rheostat

Post by hodders »

I don't think the rheostat is backlit.
-- hodders

1992 Lotus Excel Celebration, Calypso Red
2021 BMW i3s, Blue Ridge Mountain
2024 BMW i4 eDrive40, Sanremo Green

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amarshall
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Re: Speedo illumination / rheostat

Post by amarshall »

hodders wrote:I don't think the rheostat is backlit.
I think you're right - the parts manual shows the knob attached to the shaft of the rheostat with no bulb, nor space for one.
https://www.lotusexcel.co.uk/
SORN - just say NO!

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Lotus-e-Clan
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Re: Speedo illumination / rheostat

Post by Lotus-e-Clan »

It was probably glowing due to a short circuit somewhere!

I can vaguely remember this happening to mine 6 or 7 years ago...a twiddle of the rheostat to turn up dim backlights was accompanied by a slight whiff of warm electrics and then the instrument lights went out completely. I can't remember how I fixed it ? fuse or ?relay...such a long time ago...but it wasn't due to bulb failure so might be something completely different to your problem.
Peter K

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kent_racer
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Year: 1983

rheostat

Post by kent_racer »

How to dismantle the centre console on a 83 model ? :?
I've no light on it and I'm suspecting the left rheostat to be faulty.
Happy daily driver # 1326

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kent_racer
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Year: 1983

Re: rheostat

Post by kent_racer »

kent_racer wrote:How to dismantle the centre console on a 83 model ? :?
I've no light on it and I'm suspecting the left rheostat to be faulty.
I found the method at the very end og the manual 8)
Happy daily driver # 1326

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