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Main harness question

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Main harness question
#1
  This topic is about my 1971 MG MGB GT
ron neal Avatar
Coastal, SC, USA   USA
1962 MG MGA MkII
1968 MG MGC
1969 MG MGC
1969 MG MGC GT    & more
Does anyone have a picture or a description of how the main wiring harness is routed and pinned behind the pillow dash. I want to get that routing correct before installing the dash.
Ron

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bleteaches6 Avatar
bleteaches6 Silver Member Lee Orphan
Bonney Lake, WA, USA   USA
Ron

I hope these pictures help from a 79 help. You will find that the wire position of your loom will be determined a lot by the length of the lead to the various devices.


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black dash.jpg

black dash2.jpg    49.2 KB
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ozieagle Avatar
ozieagle Gold Member Herb Adler
Geelong Victoria, Australia   AUS
1958 Wolseley 1500 "Wooly"
1966 MG MGB "Bl**dy B"
This may help you.

Herb



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Attachments:
MGB78-WiringLayout.PDF    1.95 MB

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polo Mark L
Northern, IN, USA   USA
1960 MG MGA
1972 MG MGB
These are from my 72 B. I have more if needed. Send any questions you may have. Mark


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riley1489 Avatar
riley1489 Gold Member Bruce H
Great White North, QC, Canada   CAN
1953 Jaguar XK120
1959 Riley 1.5 "King George"
1973 MG MGB
Mark L has it thumbs up

The harness just lies there except for the leg at the console P clip.

B



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polo Mark L
Northern, IN, USA   USA
1960 MG MGA
1972 MG MGB
Yes and it also gets support from the tabs on the back of the dash once its installed. Except for maybe a p clip being used in the wiper motor
area, I don't recall anymore p clips being used. Once the dash is installed the harness gets plenty of support from the the tabs on the
back of the dash . And you can use pull ties if necessary to hang them out of the way if necessary. Here is a picture of the lower tabs that will give
the harness some support. Actually a couple of the metal tabs are used to support the under dash cardboard covers that I sure don't use anymore.


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ron neal Avatar
Coastal, SC, USA   USA
1962 MG MGA MkII
1968 MG MGC
1969 MG MGC
1969 MG MGC GT    & more
Appreciate all the info and pictures. I forgot about the tabs on the back of the dash providing the additional support.
Ron

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GMDad Avatar
GMDad Silver Member Don Nicholls
Caledonia, Southern Ontario, Canada   CAN
1963 MG MGB
1970 MG MGB "Mellow Yellow"
Mark your picture in post #6 look like you have the dash laying on the bench and the harness plugged into it. Is your dash harness separate from the main harness ? I would like to make my dash removeable with the harness attached to the cluster an then plug it back into the main harness.



Don Nicholls
Ontario Canada
1970 MGB Roadster "mellow"
1963 MGB SCCA Racecar
1940 Chev Street Rod
1965 Chev Pickup restored

"I get to drive them when the wife says I can"

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melbaver Avatar
melbaver Gold Member Chris Howells
Carrington, NSW, Australia   AUS
1968 MG MGB "Moneypit"
2012 Dodge Journey "Another Shopping Trolley"
Don, see my post in your other thread. I thought long and hard about separating the loom at the cockpit/engine-compartment/underside wiring so that I could install a plug on either end, install the dash, get it all tidy then thread through to the engine compartment and just join them together. Apart from he logistics of buying short lengths of colour coded wiring to do this, plus the tedious amount of work to cut and splice so that the two plugs join nicely - there is no spare length in the loom - it is built to fit, there is so much backwards and forwardsing checking each connection that if you got one wire wrong in the two plugs, you'd end up being there forever.



Chris Howells

1968 MGB Purchased already dis-assembled but which is largely back together so I'm a lot less ignorant.

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