BJ-7 Fuse block wiring problem

[robert_ellison]

The fuse block on my BJ-7 haas a color coding problem. Looking at the wiring diagram with the headlights at the top and the taillights at the bottom of the diagram the numbering is: lower Right (1)- brown, lower left (2)- purple, upper right (3)- white and upper left (4)- green.

It also shows only 4 terminals.

On mine there are 5 terminals 2 at bottom left, & 1 at the other 3 positions.

I also have no brown wire or purple wire anywhere in the vicinity.

The way I have it hooked up now is lower left(double terminal)- green, lower right-green/black, upper left- white, upper right- black.

1) Am I looking at the diagram upside down?

2) Or was my block installed upside down?

3) Are my colors wrong, or right for this fuse block?

 

[Keoke]

The fuse block on my BJ-7 haas a color coding problem. Looking at the wiring diagram with the headlights at the top and the taillights at the bottom of the diagram the numbering is: lower Right (1)- brown, lower left (2)- purple, upper right (3)- white and upper left (4)- green.

It also shows only 4 terminals.

On mine there are 5 terminals 2 at bottom left, & 1 at the other 3 positions.

I also have no brown wire or purple wire anywhere in the vicinity. ---Then you have no power from Battery

The way I have it hooked up now is lower left(double terminal)- green, lower right-green/black, upper left- white, upper right- black.
BLACK !!--Sumpin mighty wrong here too.

1) Am I looking at the diagram upside down?

2) Or was my block installed upside down?

3) Are my colors wrong, or right for this fuse block?--- :confuse:

Ther be so much wrong I will not risk trying to sort it all out. Me neither just do not hook battery up. Wait on drawings promised---Keoke

 

[GregW]

Whatever you do, don't hook up the battery. The white and black are + and - from your battery. At least with a stock wired harness. White is your switched hot feed. Green wires are hot feeds to components like turn signal, heater. They get wired to the other side of the fuse from the white wire. The brown wires are always hot feeds, purple is opposite the brown from the fuse and that's your horn.

 

[robert_ellison]

Well One thing if the set up you show is green at top the fuse block is installed upside down, although I guess it wouldn't matter if the wires were correctly placed. Unfortunately there are no purple or brown wires in the vicinity. It seems that part of this harness match the wiring diagram, parts don't would that mean I have the harness for another model? If so, I wonder which one?

Which wires go to which sized fuse?

 

[GregW]

Hi Robert,
It's hard to know if you have the wrong harness, or it is routed incorrectly. You've used the phrase "not in the vicinity" in a couple posts so I'm scratching my head a little. Here is a photo of the wiring around the fuse block area if that helps. You should have a long section of harness that goes up front on the driver's left side to the steering column, then across the front and ending at the horn (purple & purple/black wires).

 

[steveg]

I have a few comments, having recently been through this wiring on my BN6:

1) According to the factory manual, the color wiring diagram is correct for the BJ7 and upside down in the manual and in the above posting. Pretend you're peering over the windshield at it. The factory diagrams are all upside down in the manual.

2) Terminal 4 actually consists of the one shown above and the one in the 6-o'clock position (12-o'clock on the diagram), which is joined to 4 by a sheet metal jumper - evidently they needed 2 terminals to hold all those green wires.

3) Fuses: 1-2 is 50 amp Lucas or 25 amp US ; 3-4 is 35 amp Lucas or 17 amp US

Also, GregW your car must be a late BJ8, because according to Anderson Moment's Healey Restoration Guide, that's the only car with a fusebox shown in the position of the above photo - the BJ7 and other models have it next to the hood hinge. The wiring on the BJ8 is a mirror image of the other models. BJ7 and other Healeys have white and brown supply wires entering terminals 1 and 3 per diagram above.

 

[GregW]

Hi Steve,

I have a few comments, having recently been through this wiring on my BN6:

1) According to the factory manual, the color wiring diagram is correct for the BJ7 and upside down in the manual and in the above posting. Pretend you're peering over the windshield at it. The factory diagrams are all upside down in the manual.

The photo of my fuse block is the original wiring. My dad said he never had problems with the electrical system, so he didn't mess with it. (He was the original owner.) If I was to flip the block around, the short brown and purple wires wouldn't reach their proper terminals. Plus the green and white wires would cross the block oddly. Maybe the guy who wired the earlier cars retired in '63? :laugh:

Also note is the volage regulator (at least in a BJ8) doesn't follow the peer over the windshield approach. You have to be looking straight at it to get the brown wires on the right side (terminal B)

Also, GregW your car must be a late BJ8,

With the green'black and the black wires, it sounds like Robert wired his wiper motor directly to the fuse block. Those wires do come out of the harness near the block, but they should have bullet connectors which wouldn't hook directly to the spades on the block. ???

 

[bob hughes]

Just checking, which of the three wiring diagrams are you looking at. My BJ7 complies with the first one under section N of the manual. I am at work now, but from memory there are no purple cables on this diagram.
The purple starts to appear on the BJ8s early and late cars.

 

[Keoke]

Hey Bob, Greg, there is the case where the purple wire is replaced with a Brown/Green wire which routs power to the horns . I do not know which of the Healey cars this print applies to. However, all other wires at the fuse block agree with the BJ8 drawing provided by greg..--Keoke

 

[GregW]

Just checking, which of the three wiring diagrams are you looking at. My BJ7 complies with the first one under section N of the manual. I am at work now, but from memory there are no purple cables on this diagram.
The purple starts to appear on the BJ8s early and late cars.

Hmmm, I'll check when I get home, but I was under the impression the brown/green wire Keoke refers to was on the 100/6s. I thought it changed to a purple horn wire on the 3000s. I could easily be wrong though.

 

[Keoke]

TO All
I'm just thinking out loud now . What if the installer of this harness inadvertently routed that potion of the wire harness that should have gone down the right hand side of the engine bay instead ended up being routed down the Left hand side??--Keoke

 

[steveg]

FWIW - According to the factory manual, which I have in front of me, section N, the two Brown/Green wires coming off position 2 are for the BN4 and 6. However the Anderson Moment book shows two wires in that position in a BJ7 in a photograph. Section NNN shows a single purple wire off position 2 for BN7, BT7, BJ7 & 8.

Sounds like Bob Hughes' BJ7 is per section N and the Anderson Moment book.

I'm sure Greg's BJ8 is stock per the photo, it's just flopped with the input wires on actual right and the outputs on the left. Greg your dashboard layout agrees with the Anderson Moment book. I'd be curious if the numbers on your fusebox are flopped - it is a different design than the others and is supposed to have a black plastic cover.

I keep quoting that book because the authors went to great lengths to authenticate their cars and are careful to state when something in a picture is wrong or non-standard.

 

[Keoke]

Yep Steve Greg's, BJ8 is stock and the only flopping that has occurred is, the driver has flopped out of the drivers seat and is now standing in front of the car looking under the bonnet.The picture and the drawing provided by Greg are correct. I can't vouch for the ones in that book though --Keoke-- :laugh:

P.S. Thanks that was some good information--

 

[Patrick67BJ8]

TO All
I'm just thinking out loud now . What if the installer of this harness inadvertently routed that potion of the wire harness that should have gone down the right hand side of the engine bay instead ended up being routed down the Left hand side??--Keoke

Do you mean Keoke that this car could have been the first one built on a Monday after a long holiday?
Patrick

 

[Keoke]

Patric That's a good thought too and it would not be the first time it happened.---Keoke

 

[GregW]

TO All
I'm just thinking out loud now . What if the installer of this harness inadvertently routed that potion of the wire harness that should have gone down the right hand side of the engine bay instead ended up being routed down the Left hand side??--Keoke

Hi Keoke,
Yeah, I had alluded to that a couple posts ago, but I've re-thunk it. Two clues for me are the green/black wire. If that <span style="font-style: italic">is</span> from the wiper motor, reversing the harness would put that wire too far away from the fuse block. The other clue was in another thread about wiring to the coil. I don't think the harness that ends at the coil would be long enough to reach the coil going 'round the left side. Thoughts?

 

[Keoke]

Well Yeah Greg that makes some sense too, but just suppose those green and black wires were for the blower motor and hooking up the coil had not been gotten around to yet. Keoke :confuse:

 

[GregW]

FWIW - According to the factory manual, which I have in front of me, section N, the two Brown/Green wires coming off position 2 are for the BN4 and 6. However the Anderson Moment book shows two wires in that position in a BJ7 in a photograph. Section NNN shows a single purple wire off position 2 for BN7, BT7, BJ7 & 8.

Sounds like Bob Hughes' BJ7 is per section N and the Anderson Moment book.

That is weird to me that they would revert to an earlier harness two models later. I checked the errata list for Gary and Roger's book and didn't see a mention of that photo for the BJ7. My thought is that photo in the book simply had an extra circuit added by one of the owners.

I'd be curious if the numbers on your fusebox are flopped - it is a different design than the others and is supposed to have a black plastic cover.

I'm not sure about the numbers, this is what my fuse block looks like now. :laugh:

 

[GregW]

Hi Keoke,
What I was keying off of was Robert's first post where he said "lower right-green/black" While the wiper motor wire is listed as black with a green tracer, since it is so close to the fuses, I assumed that was the wire. I don't recall if the fuel sender wire pokes out anywhere between the trunk and under the dash. Probably the best thing would be for Robert to post a couple photos so we can really see what's going on.