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Dash lights stopped working after replacing all lights with LEDs

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Dash lights stopped working after replacing all lights with LEDs #1
HGB Harry Barkerding New Orleans, LA, USA Sign in to contact 1962 MG MGA MkII 1968 MG MGB	Topic Creator (OP) Feb 11, 2016 08:25 PM Joined 11 years ago 23 Posts

I just finished replacing all exterior lighting with LEDs and headlights with halogen. Also installed relay for headlights and replaced signal flasher. All exterior lights work correctly and big improvement I might add. However, it appears my dash lights have stopped working completely.

Also, my horn does not work which was a pre-existing problem. Interestingly though, pressing the horn button on signal stalk activates the brights on the headlights.

Thoughts?

HGB

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Re: Dash lights stopped working after replacing all lights with LEDs #4
Alpha-1 Len Geiger Jacksonville, FL, USA Sign in to contact 1973 MG MGB "Blaze" 1995 GMC Yukon "Bonnie Blue"	Feb 11, 2016 09:21 PM Joined 8 years ago 758 Posts

I know the flashed brights switch is powered separately from the regular headlights, so that might help explain it a bit.
That said, experts will explain what's really going on.

My MGB is like a former girlfriend:

Beautiful on the outside, a little broken on the inside...

...often topless

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Re: Dash lights stopped working after replacing all lights with LEDs #5
ohlord Rob C A tiny Island off the coast of Washington State, N.W., USA Sign in to contact 1957 Land Rover Series I "EYEYIYI" 1957 Land Rover Series I "OVRLND" 1971 MG MGB 1971 MG MGB "Bedouin 2" & more	Feb 11, 2016 11:48 PM Top Contributor Joined 12 years ago 28,877 Posts

http://www.advanceautowire.com/mgb.pdf
check your wiring
and your LED's will work and dim without negating the dimmer rheostat

LNDRVR4X4.COM
Home of Project "INCARN8'

1957 Series 1 Land Rover electric VEHICLE CONVERSION

FIXITUPCHAP.COM
FIXITUPCHAP INCORPORATED

RD3 Radar/ Electronic Warfare Technician
VIETNAM 1969-1972

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Re: Dash lights stopped working after replacing all lights with LEDs #6
ErnieY Ernie Y Albatera, Alicante, Spain Sign in to contact 1976 MG MGB GT	Feb 12, 2016 12:55 AM Top Contributor Joined 12 years ago 19,528 Posts

Harry, the only way your horn push can operate the main beam on the headlights is if you've somehow cross connected the purple and blue/white wires and bearing in mind what you've been doing that's that's going to have happened at the front where the blue/whites from the headlights connect into the harness.

It also perfectly explains why the horn doesn't work.

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Re: Dash lights stopped working after replacing all lights with LEDs #7
MG Cruiser Keith Delta4 Rockingham, WA, Australia Sign in to contact 1970 MG MGB "Moneypit"	Feb 12, 2016 03:51 AM Joined 15 years ago 2,998 Posts

LED bulbs are somewhat fussy as to orientation. Remove the bulbs and turn them 180 degrees in their sockets.

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Re: Dash lights stopped working after replacing all lights with LEDs #2
Jimmy N. Small village, The actual midwest, USA Sign in to contact 1979 MG Midget MkIV	Feb 11, 2016 08:43 PM Joined 8 years ago 2,645 Posts

Re: Dash lights stopped working after replacing all lights with LEDs #3
arkyrover Clay L Conway, AR, USA Sign in to contact 1973 MG MGB	Feb 11, 2016 09:02 PM Joined 12 years ago 407 Posts

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