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Wiring... Where do I start?

Here’s where to discuss anything specific about your standard(ish) car or something that applies to the model in general.
Peter Nuss
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Postby Peter Nuss » 30 Jan 2014 19:58

Ahhhhhhhh... no. The early harnesses are pretty much one big piece. There's the engine harness connector(sticking out of the the tranmisson hump in Bean's photo), and the tail light harness ribbon (again in Bean's photo), and the main harness (in all these photo's). Much different than the later harnesses.

Start at the head lights. You want to remove the harness so you end up with all the harness pulled toward the interior of the car. Make notes on how the wires are attached to the main harness connectors on such things as light, a/c, etc. Get the car up in the air in the front. The harness runs above the A/C stuff under the front apron. Then along the passenger's fender, back into the engine compartment and into the interior. It's stiff and heavy so go slow.

You can use a harness out of a convertable or hardtop if you are updating to a newer harness. Both the same. But, you want a harness that comes out of an A/C car since you have A/C. I've changed harnesses a couple of times. It's not that big a deal if you stay organized and take good notes and nowadays I guess pictures also.

TR8

jclay (RIP 2018)
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Postby jclay (RIP 2018) » 30 Jan 2014 22:56

I bow to Peter here!

He has a lot more experience with TR7/8s than I do! I am not joking, true is true!

Clay

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scarface031
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Postby scarface031 » 31 Jan 2014 00:25

I was going to say, its a huge harness!

I actually have everything disconnected, but I can't seem to remove it myself, because I need someone to help feed the headlight part while I pull.

It doesn't help that I have the rear end raised up and back axle dropped. I have the gas tank getting restored. I decided to go and redo electrical while I was waiting :P

Peter Nuss
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Postby Peter Nuss » 31 Jan 2014 02:46

There's not a lot of pulling envolved. You need to cut those hard rubber grommets for the headlight connectors in the engine compartment. Start at the driver's headlight and work across the front. Sometimes they used plastic clips to hold it up, sometimes metal adel clamps, sometimes it's just run between body structure. It's a one man show really. Start pulling and you are going to mess something up. The only tricky part is where it comes out of the fender well and into the fire wall. That's a pretty tight turn and those grommets have to come out with the wiring.

Oh,just remembered some of the early cars have bent metal tabs holding the harness also. All that stuff has to be loose. The car really needs to be high in the front and good lighting to see all the ways it held in there.


TR8

john 215
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Postby john 215 » 31 Jan 2014 05:11

Hi,

Wiring harness on a 7 is not as bad as it sounds, the loom will more or less lay in the right place. Take lots of pictures of clip placements etc. Use an old speedo cable taped to the old loom to pull through the inner wings etc. so the new loom can be pulled back through.

Replaced a BMW E63 645 loom last year, now that was job, the loom itself took some lifting !! Plus they only supply one loom so lots of spare connectors for options not fitted.

Cheers John

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