• Hi Guest!
    You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

MGB MGB 4-way fuse box question- 1974 MGB

Share this page

wkilleffer

wkilleffer

Jedi Knight
Country flag
Offline
Yet another post about my 74 MGB:

I just bought a new-to-me fuse box and cover for my 74 MGB. It looks to be in good shape, with no tarnishing. It's a far cry from the tarnished and paint-encrusted box that it's replacing. It came out of a Triumph, but is supposed to be the same as what's in a B. The trouble is, with the new box in, the right side tail-lamps don't work. The left ones are fine, and the brake lights work fine on both sides.

I put it into the car where #1 is at the top, just like the old one. My concern is that I might not have plugged everything back in the correct place. What worked on the old box might not work on the new. Multitester says a healthy amount of voltage is coming in, and going out. Now, if I plug both sets of red wires to the top terminals, all the lights work. I thought that one set plugged to the top terminal and the other to the second one.

If anyone could post a photo of what a properly installed fusebox looks like for a late chrome-bumpered car, I'd be most appreciative. I tried a web search, but got nowhere, and neither Haynes nor Bentley show the 4-way box in any detail.

Thank you,
 
A triumph fuse box is NOT the same as an MG fuse box. If you look on the back side of the MG fuse box , you will notice that the MG fuse box has a jumper that splits the power from the headlamp switch to the two top fuses. You can get the same effect by making an external wire that joins the two top terminals.

Alan T
 
If it came out of a Triumph, it doesn't matter how the MG box was hooked up, the Triumph wil be different....were it me, I'd sell it on ebay & buy the correct one....I've got a drawer full (self-serving self advertisement)
 
[ QUOTE ]
If anyone could post a photo of what a properly installed fusebox looks like for a late chrome-bumpered car, I'd be most appreciative. I tried a web search, but got nowhere, and neither Haynes nor Bentley show the 4-way box in any detail.

Thank you,

[/ QUOTE ]

Here's a photo of my (dusty) 73 MGB. I just replaced the fusebox. Probably the same thing you've got - Triple C was having a sale on new Lucas fuseboxes at Carlisle and it was too good to pass up. You need a heavy gauge jumper to bond the top two lugs on the left side (top left in the photo). Yeah, I know, it should be a different color wire, I didn't have any around. I also cut the female spades off and resoldered new ones; you might want to consider doing that too while you're at it.

fuse.jpg
 
[ QUOTE ]
[ QUOTE ]
If anyone could post a photo of what a properly installed fusebox looks like for a late chrome-bumpered car, I'd be most appreciative. I tried a web search, but got nowhere, and neither Haynes nor Bentley show the 4-way box in any detail.

Thank you,

[/ QUOTE ]

Here's a photo of my (dusty) 73 MGB. I just replaced the fusebox. Probably the same thing you've got - Triple C was having a sale on new Lucas fuseboxes at Carlisle and it was too good to pass up. You need a heavy gauge jumper to bond the top two lugs on the left side (top left in the photo). Yeah, I know, it should be a different color wire, I didn't have any around. I also cut the female spades off and resoldered new ones; you might want to consider doing that too while you're at it.

fuse.jpg


[/ QUOTE ]

Don't know why you're upset about dust in the engine compartment. Yours looks much better than mine. Someone painted mine black without removing anything, which is why I'm replacing the fusebox in the first place.

Thanks for posting this. It was a real help.
 
I like the "not so" secret extra key hiding place. /ubbthreads/images/graemlins/wink.gif
 
The factory would do that "back when" Kenny... Just not with that "fancy-schmancy" key. /ubbthreads/images/graemlins/wink.gif
 
[ QUOTE ]
The factory would do that "back when" Kenny... Just not with that "fancy-schmancy" key. /ubbthreads/images/graemlins/wink.gif

[/ QUOTE ]

... and that fancy-schmancy key is just for show. When I had it cut, I told the kid at Sears to just randomize the teeth. I have a duplicate of someone's miscut house key scrwed inside the fender well. /ubbthreads/images/graemlins/laugh.gif
 
Clever Lad.
 
Back
Top